In ΔABC, m∠B = m∠C. The angle bisector of ∠B meets
AC at point H and the angle bisector of ∠C meets AB at point K. Prove that BH = CK.
Answers
Statement Reason
m∠B = m∠C Given
AB = AC Isosceles Triangle Definition
AK=KB=AH=HC Angle Bisector Postulate
ΔBKC = ΔHBC Line BC is common side
BH = CK Corresponding parts of congruent triangles are congruent
To prove that BH = CK in triangle ABC, we can use the angle bisector theorem. The theorem states that the angle bisector of an angle in a triangle divides the opposite side into two segments proportional to the other two sides. By applying this theorem and representing BH as x and CK as y, we can show that x = y, thus proving that BH = CK.
Explanation:In triangle ABC, to prove that BH = CK, we can use the angle bisector theorem. Since m∠B = m∠C, the angle bisector of ∠B will divide the side AC into two segments proportional to the other two sides. Let's denote BH as x and CK as y. According to the angle bisector theorem, we have:
AB / BC = AH / HCAC / BC = AK / BKSince AB = AC (isosceles triangle), we can rewrite the first equation as:
x / BC = AH / HC
And the second equation as:
AC / BC = AK / y
Since AB = AC, we can substitute AC with AB:
x / BC = AK / y
Now, we can cross-multiply and solve for x and y:
x * BC = AK * HC
y * BC = x * HK
Simplifying, we get:
x = AK * HC / BC
y = x * HK / BC
Since HK = HC, we have:
x = AK
y = x
Therefore, BH = x = CK = y.
Related Questions
The length of a rectangular jewelry box is 3 in. more than twice the width. the perimeter is 36 in. find the length and the width.
Answers
Length: 2x+3
Perimeter=x+x+2x+3+2x+3=6x+6
6x+6=36
x=5
Width=5 in.
Length= 2(5)+3=13 in.
how many times can 32 go into 64
Answers
hope this helps
A plane traveled from California and back. It took one hour longer on the way out than it did on the way back. The plane's average speed out was 300 mph. The average speed on the way back was 350 mph. How many hours did the trip out take? A. 7 hours B. 6 hours C. 13 hours D. 8 hours
Answers
300t = 350(t-1)
300t = 350t-350
-50t=-350
t = -350 /-50
t = 7 hours
50 POINTS!! + BRAINLIEST
Find the measure of ∠AED
Answers
I just did 3x+10=5x and solved it
Angles AEB and DEC are vertical angles, so their measures are equal.
5x = 3x + 10
2x = 10
x = 5
m<AEB = 5x = 5 * 5 = 25
Angle AED is supplementary to <AEB, so
m<AED + m<AEB = 180
m<AED + 25 = 180
m<AED = 155
Answer is D.
In how many games did the team score at least 70 points?
Answers
Answer: the answer is 5
Step-by-step explanation:
b
A car is traveling at a rate of 50 miles per hour. what is the car's rate in kilometers per hour? how many kilometers will the car travel in 3 hours? in your computations, assume that 1 mile is equal to 1.6 kilometers.
Answers
Final answer:
To convert 50 miles per hour to kilometers per hour, multiply by 1.6 to get 80 km/h. In 3 hours, the car will travel 240 kilometers.
Explanation:
The student is asking how to convert a car's speed from miles per hour (mi/h) to kilometers per hour (km/h), and then calculate the distance traveled in kilometers over a period of 3 hours.
Conversion from mi/h to km/h
To convert the car's speed from miles per hour to kilometers per hour, you can use the conversion factor that 1 mile is equal to 1.6 kilometers. Given the car's speed of 50 miles per hour, the calculation would be:
Speed in km/h = Speed in mi/h imes Conversion factor = 50 mi/h imes 1.6 km/mi = 80 km/h.
Distance Traveled in 3 Hours
Now, to compute the distance the car will travel in 3 hours at 80 km/h, use the formula:
Distance = Speed imes Time = 80 km/h imes 3 h = 240 kilometers.
find (f•g) when f(x)=x^2-7x+12 and g(x)=3/x^2-16
Answers
1) g(x) = 3 / (x^2 - 16),
2) f(x) = x^2 - 7x + 12, and
3) (f•g)(x) = the product of the two functions f(x) * g(x)
The solution is found by factoring the two polynomilas f(x) and g(x):
f(x) = x^2 - 7x + 12 = (x - 4) (x -3)
g(x) = x^2 - 16 = (x - 4) (x + 4)
=> (f•g) (x) = (x - 4) (x - 3) / [ (x - 4)(x + 4) ] = (x - 3) / (x + 4)
Answer: (x - 3) / (x + 4)
What is the area of rhombus ABCD ?
Enter your answer in the box. Do not round at any steps.
Answers
Answer:
16 units
Step-by-step explanation:
The area of a rhombus is given by the formula A = bh. The base would be CB and the height would be DP. We will use the distance formula to find the length of each:
[tex]d=\sqrt{y_2-y_1)^2+(x_2-x_1)^2}[/tex]
For CB, we have
[tex]d=\sqrt{(2-0)^2+(3--1)^2}=\sqrt{2^2+4^2}=\sqrt{4+16}=\sqrt{20}[/tex]
For DP we have
[tex]d=\sqrt{(2--1.2)^2+(-5--3.4)^2}=\sqrt{3.2^2+1.6^2}=\sqrt{10.24+2.56}=\sqrt{12.8}[/tex]
This makes the area of the rhombus
[tex]A=bh=\sqrt{20}\times \sqrt{12.8}=\sqrt{20\times 12.8}=\sqrt{256}=16[/tex]
The area of a rhombus can be found using the formula (diagonal1 * diagonal2) / 2. In this case, the area is 24 cm^2.
Explanation:The area of a rhombus can be found using the formula:
Area = (diagonal1 * diagonal2) / 2
where diagonal1 and diagonal2 are the lengths of the two diagonals of the rhombus.
For example, if diagonal1 = 6 cm and diagonal2 = 8 cm, the area of the rhombus is:
Area = (6 * 8) / 2 = 24 cm2
Therefore, the area of rhombus ABCD is 24 cm2.
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Alana is writing a coordinate proof to show that the diagonals of a rectangle are congruent. She starts by assigning coordinates to a rectangle as shown. Then she uses the coordinates to write and simplify expressions for the lengths of the diagonals.
What is the length of one of the diagonals of the rectangle?
Enter an expression in the box for the length of the diagonal.
Answers
d(S,P) = √b^2
d(S,P) = b
so
SP = b
d(P, Q) = √(a-0)^2 + √(b-b)^2
d(P, Q) = √a^2
d(P, Q) = a
so
PQ = a
SQ = c^2 = a^2 + b^2
SQ = √(a^2 + b^2)
answer
the length of one of the diagonals of the rectangle is √(a^2 + b^2)
The length of a line with known end point coordinates is given by Pythagoras's theorem
The expression for the length of the diagonal [tex]\overline{PR}[/tex], is [tex]\underline{\sqrt{b^2 + a^2}}[/tex]
The expression for the length of the diagonal [tex]\overline{QS}[/tex], is [tex]\underline{\sqrt{b^2 + a^2}}[/tex]
Reason:
The given coordinates of the vertices are; P(0, b), Q(a, b), R(a, 0), and S(0, 0)
Diagonals of the rectangle are segments; [tex]\overline{PR}[/tex], and [tex]\overline{QS}[/tex]The lengths of the diagonals are given by the equation for finding the length, l, of a line given the coordinates which is [tex]l = \sqrt{\left (y_{2}-y_{1} \right )^{2}+\left (x_{2}-x_{1} \right )^{2}}[/tex]
Where:
(x₁, y₁) = P(0, b), and (x₂, y₂) = R(a, 0), we get;
[tex]Length \ of \ diagonal \ segment \ \overline{PR} = \sqrt{\left (0-b \right )^{2}+\left (a-0 \right )^{2}} = \sqrt{b^2 + a^2}[/tex]Where:
(x₁, y₁) = Q(a, b), and (x₂, y₂) = S(0, 0), we get;
[tex]Length \ of \ diagonal \ segment \ \overline{QS} = \sqrt{\left (0-b \right )^{2}+\left (0-a \right )^{2}} = \sqrt{b^2 + a^2}[/tex]Therefore,
The expression for the length of the diagonal is [tex]\underline{\sqrt{b^2 + a^2}}[/tex]Learn more here:
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We’ve seen that natural numbers are closed under addition. Determine the closure of natural numbers under the other three operations, and give examples to support your answers.
Answers
Natural numbers are closed under multiplication but not under subtraction and division: subtracting or dividing two natural numbers can lead to results that aren't natural numbers (negative numbers or fractions, respectively).
Explanation:The student's question pertains to the closure of natural numbers under the operations of subtraction, multiplication, and division. Natural numbers are numbers used for counting and ordering that include all positive integers from 1 onwards. Let's evaluate each of these operations with respect to closure:
Subtraction: Natural numbers are not closed under subtraction because subtracting a larger number from a smaller one results in negative numbers, which are not part of the natural numbers. For example, 3 - 5 = -2 is not a natural number.
Multiplication: Natural numbers are closed under multiplication because the product of any two natural numbers is always a natural number. For example, 2 x 3 = 6, and both the numbers and result are natural numbers.
Division: Natural numbers are not closed under division because the division of two natural numbers can result in a fraction or a decimal that is not a natural number. For example, 1 / 2 = 0.5, which is not a natural number.
When a natural number is subtracted or divided by another, the result might not always be a natural number, indicating that natural numbers are not closed under these operations.
The closure property holds for addition and multiplication of natural numbers, but not for subtraction and division.
Explanation:Addition:The closure property states that when you add two natural numbers, the result is always a natural number. For example, 2 + 3 = 5.
Subtraction:Subtraction is not closed under natural numbers. For example, if you subtract 3 from 2, you get -1, which is not a natural number.
Multiplication:The closure property holds for multiplication as well. When you multiply two natural numbers, the result is always a natural number. For example, 2 x 3 = 6.
Division:Division is not closed under natural numbers. For example, 2 ÷ 3 = 0.67, which is not a natural number.
Chloe draws three parallelograms. In each figure, she measures a pair of angles, as shown.
What is a reasonable conjecture for Chloe to make by recognizing a pattern and using inductive reasoning?
In a parallelogram, all angles are congruent
In a parallelogram, consecutive angles are congruent.
In a parallelogram, consecutive angles are supplementary.
In a parallelogram, all angles are supplementary.
Answers
Solution-
1st statement- In a parallelogram, all angles are congruent.
If all the angels are congruent then all angles will be 90° (as summation of all the angles are 360° and 360/4= 90°), then it will be either a rectangle or a square, not a parallelogram.
2nd statement- In a parallelogram, consecutive angles are congruent.
If consecutive angles are congruent, then it will be rectangle or a square, not a parallelogram. In a parallelogram, opposite angles are congruent not consecutive angles.
4th statement- In a parallelogram, all angles are supplementary.
In a parallelogram, all the consecutive angles are supplementary or summation of measurements consecutive angles is 180°, not all the angels are supplementary, because opposite angles can't be supplementary.
3rd statement- In a parallelogram, consecutive angles are supplementary.
This is the reasonable conjecture for a parallelogram, because always the summation of measurement of consecutive angles are 180°.
What are the missing angle measures in triangle ABC?
a.1.4° and 88.6°
b.18.6° and 71.4°
c.35.5° and 54.5°
d.44.4° and 45.6°
Answers
angle a = arctan(5/7) = 35.5
angle b = arctan(7/5) = 54.5
Answer is C
Answer:
(C)35.5° and 54.5°
Step-by-step explanation:
It is given that ABC is a right angled triangle which is right angled at C and AC=7 inches and CB=5 inches.
Now, using the trigonometry, we have
From ΔABC, we have
[tex]\frac{BC}{AC}=tanA[/tex]
[tex]\frac{5}{7}=tanA[/tex]
[tex]0.714=tanA[/tex]
[tex]A=tan^{-1}(0.714)[/tex]
[tex]A=35.5^{\circ}[/tex]
Again, from ΔABC, we have
[tex]\frac{AC}{BC}=tanB[/tex]
[tex]\frac{7}{5}=tanB[/tex]
[tex]1.4=tanB[/tex]
[tex]B=tan^{-1}(1.4)[/tex]
[tex]B=54.5^{\circ}[/tex]
Therefore, the measure of missing angles in triangle ABC are 35.5° and 54.5°respectively.
Thus, option C is correct.
The diameter of a circular clock is 12 inches. what is the approximate length of the outer edge of the clock between the numbers 3 and 6?
Answers
So to find the length of the outer edge between 3 and 6 = 2 x Pi x 6 = 37.7. And then divide 37.7 by 4 which equals to 9.425 inches
A plumber charges $70 per hour plus $40 dollars for the call. What does he charge for 4 hours of work
Answers
($70 × 4) + $40
Now, all you would have to do is solve it using the order of operation (PEMDAS).
($70 × 4) + $40 = $280 + $40
$280 + $40 = $320
The plumber charged $320.
I hope this helps!
y=280+40
y=320, so he charges $320 for 4 hours of work.
hope this helps you!
which expression is equal to the expression below?
(2x6)^4
A 4 x (2x6)
B 8^4
C 2 x (6)^4
D 2^4 x 6^4
Answers
Hey there!
[tex]\bold{(2\times6)^4}[/tex][tex]\bold{2\times6=12}[/tex][tex]\bold{12\times12\times12\times12}[/tex][tex]\bold{12\times12=144}[/tex][tex]\bold{144\times144=20,736}[/tex][tex]\bold{A.\downarrow}[/tex]
[tex]\bold{4\times(2\times6)}[/tex][tex]\bold{2\times6=12}[/tex][tex]\bold{4\times12=48}[/tex][tex]\bold{48\neq20,736}[/tex][tex]\boxed{\bold{incorrect}}[/tex][tex]\bold{B.\downarrow}[/tex]
[tex]\bold{8^4}[/tex][tex]\bold{8\times8\times8\times8}[/tex][tex]\bold{8\times8=64}[/tex][tex]\bold{64\times64=4,096}[/tex][tex]\bold{4,096\neq20,736}[/tex][tex]\boxed{\bold{incorrect}}[/tex]
[tex]\bold{C.\downarrow}[/tex]
[tex]\bold{2\times(6)^4}[/tex][tex]\bold{6^4=1,296}[/tex][tex]\bold{2\times1,296=2,592}[/tex][tex]\bold{2,592\neq20,736}[/tex][tex]\boxed{\bold{incorrect}}[/tex][tex]\bold{D\downarrow}[/tex]
[tex]\bold{2^4\times6^4}[/tex][tex]\bold{2^4=16}[/tex][tex]\bold{6^4=1,296}[/tex][tex]\bold{16\times1,296=20,736}[/tex][tex]\bold{20,736=20,736}[/tex][tex]\boxed{\boxed{\bold{correct}}}[/tex][tex]\boxed{\boxed{\bold{Answer:D.2^4\times6^4}\checkmark}}[/tex]
Good luck on your assignment and enjoy your day!
~[tex]\bold{LoveYourselfFirst:)}[/tex]
Which number line represents the graph of x ≤ 0?
Answers
Answer:
first one
Step-by-step explanation:
The number line represents the graph of x ≤ 0 is number line (b)
How to determine the number line?The inequality expression is given as:
x ≤ 0
The inequality symbol ≤ means that:
The number line starts at 0The arrow faces the leftThe circle at 0 is a closed circleHence, the number line represents the graph of x ≤ 0 is number line (b)
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Which equation can be used to find the answer? sharifa spends $51 on the first day of her vacation. this leaves her with $127 to spend during the rest of her vacation. how much money did sharifa bring to spend during her vacation?
a. t = 127 · 2 t = 254 $254
b. t – 51 = 127 t = 178 $178
c. t + 51 = 127 t = 76 $76
d. t = 127 ÷ 2 t = 63.5 $63.5?
Answers
Therefore, the answer should be b.
Hope I helped :)
Alison wants to construct the perpendicular bisector of MN¯¯¯¯¯¯¯. What should Alison do for her first step? A.) Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is equal to 1/2MN . B.) Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is greater than 1/2MN. C.) Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is less than 1/2MN. D.) Use the straightedge to draw a line that intersects MN¯¯¯¯¯¯¯ at a point between M and N.
Answers
Answer:
Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is greater than 1/2MN.
Step-by-step explanation:
The site told me that correct answer was B., so it was greater than.
How would you graph and solve this ?? Plz help! Open to see image.
Answers
keep in mind that an absolute value expression is in effect a piece-wise.
[tex]\bf |x-4|\le 2\implies \begin{cases} +(x-4)\le 2\\ -------\\ -(x-4)\le 2\\ x-4\ge -2 \end{cases}\implies \begin{array}{llll} -2\le x-4\le 2\\\\ \textit{adding 4 to all 3 sides}\\\\ \boxed{2\le x \le 6} \end{array}\\\\ -------------------------------\\\\ |x-5|\ \textgreater \ 3\implies \begin{cases} +(x-5)\ \textgreater \ 3\\ -------\\ -(x-5)\ \textgreater \ 3\\ x-5\ \textless \ -3 \end{cases}\implies \begin{array}{llll} 3\ \textless \ x-5\ \textless \ -3\\\\ \textit{adding 5 to all 3 sides}\\\\ \boxed{8\ \textless \ x\ \textless \ 2} \end{array}[/tex]
for a different pizza dough recipe, the equation f=2.5w represents the number of cups of flour, f, that you need for w cups of water. what is the constant of proportionality? explain what it means in this context.
Answers
For any direct variation, the equation is of the form y = kx, where k is the constant of proportionality.
Given the equation: f = 2.5wThe constant of proportionality is 2.5.
This means that the ration of the cups of flour to the cups of water used in the recipe is 2.5
Final answer:
The constant of proportionality in the equation f=2.5w is 2.5, representing the ratio of cups of flour to cups of water for the recipe.
Explanation:
Proportionality Constant:
The constant of proportionality in the equation f=2.5w is 2.5. In this context, the constant of proportionality represents the ratio of cups of flour to cups of water needed for the pizza dough recipe.
Explanation:
The constant 2.5 indicates that for every cup of water (w), you will need 2.5 cups of flour (f) in the pizza dough recipe.
7.9×10^-6 in standard notation.
Answers
(Please help) Which answer describes the polynomial?
[tex]3x^3+4x^2-7[/tex]
A) quatric trinomial
B) cubix trinomial
C) quadratic trinomial
D) cubic binomial
Answers
notice, there are three terms, therefore is a trinomial.
the term that has the highest degree, has a degree of 3, therefore the degree of the polynomial as a whole is 3, or a cubic degree.
so, is a cubic trinomial.
What is the japanese poetry of a pattern of 5 7-5 syllables?
Answers
Ms. johnson's class is having a pizza party. if there are 14 students and 7 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives?
Answers
We are asked about the fraction of pizza each student gets, so the relevant numbers here is only 14 students and 7 pizzas. SO the fraction of pizza each student get is the ratio of the two:
fraction = 7 pizzas / 14 students
fraction = 1 / 2
So each student gets 1/2
Each student receives 4 slices out of 8, or half a pizza, which is represented by the fraction 1/2. There are 56 slices available in total (7 pizzas times 8 slices each), and when that is divided by 14 students, it equals 4 slices per student.
The question asks for the fraction of one pizza that each student receives at a pizza party. Given that there are 14 students and 7 pizzas, each pizza is cut into 8 slices. This information can be used to calculate the total number of slices available and then divide that by the number of students to determine the fraction of a pizza each student gets.
First, we find the total number of slices by multiplying the number of pizzas by the number of slices per pizza:
7 pizzas x 8 slices per pizza = 56 slices
Next, we divide the total number of slices by the number of students to find how many slices each student will receive:
56 slices ÷ 14 students = 4 slices per student
Since each pizza has 8 slices, 4 slices represent half a pizza. Therefore, the fraction of one pizza that each student receives is 1/2.
Factor the expression below x^2 -6x+9
Answers
Answer:
Factor: [tex](x-3)(x-3)[/tex]
Step-by-step explanation:
Given: [tex]x^2-6x+9[/tex]
Factor the given polynomial. It is quadratic equation.
[tex]\Rightarrow x^2-6x+9[/tex]
Using formula: [tex]a^2-2ab+b^2=(a-b)^2[/tex]
So, first we make given polynomial to perfect square.
[tex]\Rightarrow x^2-2\cdot x\cdot 3+3^2[/tex]
[tex]a\rightarrow x[/tex]
[tex]b\rightarrow 3[/tex]
[tex]\Rightarrow (x-3)^2[/tex]
[tex]\Rightarrow (x-3)(x-3)[/tex]
Hence, The factor of given polynomial is [tex]\Rightarrow (x-3)(x-3)[/tex]
Factorizing the polynomial expression x² - 6x + 9 = (x - 3)²
What is factorization?Factorization is the simplification of an expression into a smaller expression using its factors.
To factor the polynomial expression. x² - 6x + 9, we proceed as follows
Since we have the polynomial expression x² - 6x + 9, we multiply x² by 9 to get x² × 9 = 9x².
Now, we desire to find the factors of 9x² so that the sum of those factors equal - 6x
Thus, we have 9x² = -3x × (-3x)
So, -6x = -3x - 3x
Thus, we replace this with -6x, so
x² - 6x + 9 = x² - 3x - 3x + 9
So, factorizing, we have that
x² - 3x - 3x + 9 = x(x - 3) - 3(x - 3)
= (x - 3)(x - 3)
= (x - 3)²
So, factorizing x² - 18x + 81 = (x - 9)²
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NEED HELP! Thanks!
Two trains leave the same station at the same time, but are headed in opposite directions. One train travels at 70 mph and the other train travels at 80 mph.
How much time passes until the trains are 600 mi apart?
Enter your answer in the box.
Answers
Castel made a trip to the ferry office and back. On the trip there he traveled 60 km/h and on the return trip he went 45 km/h. How long did the trip there take if the return trip took four hours?
Answers
We have:
Speed going out = 60 km/h
Speed return = 45 km/h
Time return = 4 hours
Distance return = 45 × 4 = 180 km
Return distance = Distance of travel out
180 = 60 × time
Time = 180 ÷ 60
Time = 3 hours
A cotton candy vendor has 11 cones of blue cotton candy to sell. if the blue cotton candy is 25% of the total number of cones, how many total cotton candy cones does he have
Answers
11*4=44
The total number of cotton candy cones is 44.
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a mans weekly wage was £336 but now he earns £420. what is the percentage change
Answers
Movie tickets for an adult and three children cost $20. an adult's ticket costs $2 more than a child's ticket. find the cost of an adult's ticket.
Answers
c- price of children's ticket
a+3c=20
a=c+2
c=a-2
a+3(a-2)=20
a+3a-6=20
4a=26
a=6.5
The cost of an adult's ticket is $6.50