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Answer:
Joey must get a score of 94 to have a average test score of 90.
Step-by-step explanation:
Joey wants a average score of 90.
He already scored 91 and 85 on the previous two tests, and wants to know the score to get a 90 as an average.
Set the equation:
Average = (score of known tests + x)/(amount of tests in all).
Note that: x = score of the next test.
First, Plug in the corresponding numbers to the corresponding terms/variables:
90 = (91 + 85 + x)/(3)
Simplify. Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
First, multiply 3 to both sides:
90(3) = (91 + 85 + x)/(3) * 3
270 = 91 + 85 + x
Isolate the variable x. Combine like terms:
270 = (91 + 85) + x
270 = 176 + x
Subtract 176 from both sides:
270 (-176) = 176 (-176) + x
x = 270 - 176
x = 94
Joey must get a score of 94 to have a average test score of 90.
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Answer:
c ≈ 4.2 ft
Step-by-step explanation:
Using the cosine rule with a = 7, b = 8 and C = 32°, then
c² = 7² + 8² - (2 × 7 × 8 × cos32°)
= 49 + 64 - (112 × cos32°)
= 113 - 94.98
c = [tex]\sqrt{113-94.98}[/tex] ≈ 4.2 ft ( to the nearest tenth )
A Situation for y=5x
Find the missing number so that the equation has no solutions x - 7 - 7x = -5x - 12
The equation is simplified to -x = 5, yet a negative x value indicates that the identity is not true. Hence, there is no solution to this equation.
Explanation:To solve this equation, we should first try to simplify both sides of the equation.
On the left side, combine like terms. This gives us -6x - 7.
On the right side, we already have -5x - 12.
Setting these expressions equal to each other yields: -6x - 7 = -5x - 12.
Adding 5x to both sides gives us -x - 7 = -12.
Then adding 7 to both sides gives us -x = 5.
However, a negative x value would indicate that the identity is not true, thus the equation has no solution.
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Which rule represents the translation from the pre-image,
ДАВС, tо thе іmаge, ДАВ'C'?
x x
оооо
x x
(x, y) — (х + 7, y+6)
О (x, y) — (х+7, у– 6)
=(x – 6, y + 7)
о(x, y) — (х+6, y+7)
Answer:(x,y)-(x+7,y+6)
Step-by-step explanation:
Dev has 9 shells. Zoe has 55 shells, Zoe gives some shells to Dev. Now zoe has 3 times as many shells as dev. How many shells does Zoe give to Dev.
Answer:
number of shells zoe gives to dev = 7
number of shells zoe is left with = 55-7= 48
number of shells dev has = 9+7=16
Step-by-step explanation:
let the initial number of shells that dev has be A, and initial number of shells that zoe has be B.
let the number of shells that zoe gives to dev be x.
after giiving x shells zoe is left with 3 times the number of shell as that of dev.
therefore number of shells with zoe = 3×number of shells with dev.
number of shells with zoe = initial shells - x = 55-x
number of shells with dev = initial shells + number of shells he gets
= 9+x
therefore (55-x)=3×(9+x)
55-x = 27+3x
55-27=3x+x
4x = 28
x= 7
therefore number of shells zoe gives to dev = 7
number of shells zoe is left with = 55-7= 48
number of shells dev has = 9+7=16
Answer:
Zoe laverne!!~!!!!!!!~~~!~~!~!~!
Step-by-step explanation:
What is the opposite of the number of 5 and 1/2
Answer:
the answer will be -5 and 1/2
Answer:
5 is a regular number and 1/2 is a fraction
make brainliest
Step-by-step explanation:
62,591 + 7.1 X 10-2 in standard notations
How many real cube roots does
-216 have?
Answer:
-216 has three real cube roots.
Step-by-step explanation:
Please help me! I’m very stuck for hours
Answer:
a. y = 0.012x²
b. 4.80 m
c. 25 m/s
Step-by-step explanation:
a. First, we need to determine what kind of function this is (linear, quadratic, etc.).
Logically, the function must pass through the origin, so we can compare the ratios between points.
Let's look at (5.00, 0.30) and (10.00, 1.20). When we double the speed, the depth quadruples. That tells us this must be a quadratic equation.
y = kx²
Plug in a point to find k:
0.30 = k (5.00)²
k = 0.012
Therefore, the equation is:
y = 0.012x²
We can check our answer by plugging in more points.
1.20 = 0.012 (10.00)²
2.70 = 0.012 (15.00)²
b. Find y when x = 20.00.
y = 0.012 (20.00)²
y = 4.80
c. Find x when y = 7.50.
7.50 = 0.012 x²
x = 25
what is y equals negative five over two times negative two
Answer:
y = - 5/2 * - 2
y = 10/2
y = 5
Step-by-step explanation:
What is the Standard Form of the line with x-intercept of 6 and y-intercept of 5?
keeping in mind that standard form for a linear equation means
• all coefficients must be integers, no fractions
• only the constant on the right-hand-side
• all variables on the left-hand-side, sorted
• "x" must not have a negative coefficient
[tex]\bf \stackrel{\textit{x-intercept}}{(\stackrel{x_1}{6}~,~\stackrel{y_1}{0})}\qquad \stackrel{\textit{y-intercept}}{(\stackrel{x_2}{0}~,~\stackrel{y_2}{5})} ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{5}-\stackrel{y1}{0}}}{\underset{run} {\underset{x_2}{0}-\underset{x_1}{6}}}\implies -\cfrac{5}{6}[/tex]
[tex]\bf \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{0}=\stackrel{m}{-\cfrac{5}{6}}(x-\stackrel{x_1}{6}) \\\\\\ \stackrel{\textit{multiplying both sides by }\stackrel{LCD}{6}}{6(y-0)=6\left(-\cfrac{5}{6}(x-6) \right)}\implies 6y=-5(x-6) \\\\\\ 6y=-5x+30 \implies 5x+6y=30[/tex]
The standard form of the line with an x-intercept of 6 and a y-intercept of 5 is -5x + 6y = 30.
Explanation:The standard form of a linear equation is given by the equation Ax + By = C, where A, B, and C are real numbers and A and B are not both zero. To find the standard form of the line with an x-intercept of 6 and a y-intercept of 5, we can use the slope-intercept form of a line, which is y = mx + b, where m is the slope and b is the y-intercept.
First, let's find the slope using the two intercepts. The slope is (y-intercept - x-intercept) / (0 - 6) = (5 - 0) / -6 = -5/6.
Now, we can substitute the slope and the y-intercept into the standard form equation to get: (-5/6)x + y = 5. Multiplying through by 6, we get -5x + 6y = 30. Therefore, the standard form of the line is -5x + 6y = 30.
If (3, 10) is the endpoint of a line segment, and
(-2, 3) is its midpoint, find the other endpoint.
Answer:
The required points of the given line segment are ( - 7, - 4 ).
Step-by-step explanation:
Given that the line segment AB whose midpoint M is ( - 2, 3 ) and point A is ( 3, 10), then we have to find point B of the line segment AB -
As we know that-
If a line segment AB is with endpoints ( [tex]x_{1}, y_{1}[/tex] ) and ( [tex]x_{2}, y_{2}[/tex] )then the mid points M are-
M = ( [tex]\frac{ x_{1} + x_{2} }{2}[/tex] , [tex]\frac{ y_{1} + y_{2} }{2}[/tex] )
Here,
Let A ( 3, 10 ), B ( x, y ) with midpoint M ( - 2, 3 ) -
then by the midpoint formula M are-
( - 2, 3 ) = ( [tex]\frac{ 3 + x}{2}[/tex] , [tex]\frac{ 10 + y}{2}[/tex] )
On comparing x coordinate and y coordinate -
We get,
( [tex]\frac{ 3 + x}{2}[/tex] = - 2 , [tex]\frac{ 10 + y}{2}[/tex] = 3)
( 3 + x = - 4, 10 + y = 6 )
( x = - 4 - 3, y = 6 - 10 )
( x = - 7, y = -4 )
Hence the required points A are ( - 7, - 4 ).
We can also verify by putting these points into Midpoint formula.
Final answer:
To find the other endpoint of a line segment with a known endpoint (3, 10) and midpoint (-2, 3), use the midpoint formula in reverse to calculate the coordinates, resulting in the other endpoint being (-7, -4).
Explanation:
To find the other endpoint of a line segment when given one endpoint and the midpoint, you can use the midpoint formula in reverse. The midpoint formula in two dimensions is
( (x1+x2)/2, (y1+y2)/2 ), where (x1, y1) and (x2, y2) are the endpoints of the line segment. Given that (3, 10) is one endpoint and (-2, 3) is the midpoint, we can set up equations to find the coordinates of the unknown endpoint (x2, y2).
To find x2, we use the formula for x-coordinate of the midpoint: (-2 + 3)/2 = (x2 + 3)/2. Solving for x2 gives us x2 = -2 - 3 = -7.
To find y2, we use the formula for y-coordinate of the midpoint: (3 + 10)/2 = (y2 + 10)/2. Solving for y2 gives us y2 = 2*3 - 10 = 6 - 10 = -4.
Therefore, the other endpoint of the line segment is (-7, -4).
jody runs the 500 yard dash for his school track team in 1 minute. Find this rate in yards per second
Answer: 8 1/3 yards per second
500 yards/60 seconds=8 1/3 yards per second
Check Work:
8 1/3 yards per second*60 seconds=500 yards per minute.
Hope this helps!
Can you simplify this expression 3/4m + 4/5m=
Answer:
1 11/20m
Step-by-step explanation:
4 times 5 is 20
3/4(5) 4/5(4) =
15/20m + 16/20m =
31/20m = 1 11/20m
A bookstore carries 72 magazines. 50% of the magazines are women's magazines. How many women's magazines does the bookstore carry?
Answer:
36
Step-by-step explanation:
72/2=36 50% of 72 is 36
Answer:
36
Step-by-step explanation:
72 divided by 2 to get a quotient of 36
Complete the equation of the line through ( − 9 , 7 ) and ( − 6 , − 3 ) Use exact numbers. y =
Answer:
Step-by-step explanation:
first we need to find the slope using the slope formula :
slope = (y2 - y1) / (x2 - x1)
(-9,7)...x1 = -9 and y1 = 7
(-6,-3)....x2 = -6 and y2 = -3
now we sub
slope = (-3 - 7) / (-6 - (-9) = -10 / (-6 + 9) = -10 / 3
so our slope is -10/3
now we use y = mx + b....with m representing the slope
slope(m) = -10/3
use either of ur points....I will use (-9,7)...x = -9 and y = 7
we are solving for b, the y intercept
now we sub
7 = -10/3(-9) + b
7 = 30 + b
7 - 30 = b
- 23 = b
so ur equation is : y = -10/3x - 23
Final answer:
To find the equation of the line through (-9, 7) and (-6, -3), calculate the slope, which is -10/3, and then use the point-slope form to derive the equation y = -10/3 x + 23.
Explanation:
To complete the equation of the line through the points (-9, 7) and (-6, -3), we need to find the slope (m) and use one of the points to find the y-intercept (b) in the slope-intercept form y = mx + b.
Step 1: Find the slope (m):
Slope (m) is equal to the rise over run. We calculate it using the formula:m = (y2 - y1) / (x2 - x1)Plugging the given points into the formula:m = (-3 - 7) / (-6 - (-9))m = (-10) / (3)m = -10/3Step 2: Use point-slope form to find equation:
Using the slope and one of the points, say (-9, 7), we plug the values into the point-slope form:y - y1 = m(x - x1)y - 7 = (-10/3)(x - (-9))We then distribute the slope and move the y1 to the other side to solve for y:y - 7 = -10/3 x - 30y = -10/3 x + 23The completed equation of the line is y = -10/3 x + 23.
A carpet squares has sides that are 9inches long. what’s the area of of carpet square
To calculate the area of a carpet square with sides of 9 inches, you multiply the side length by itself, resulting in an area of 81 square inches.
Explanation:The question is asking for the area of a carpet square whose sides are 9 inches long. To find the area of a square, you multiply the length of one side by itself, because the formula for the area of a square is Area = side × side. In this case, each side of the carpet square is 9 inches long.
So, the area of the carpet square would be calculated as follows:
Area = 9 inches × 9 inchesArea = 81 square inchesTherefore, the area of the carpet square is 81 square inches.
Which is the graph of g(x) =[2/3]x -2
Answer:
slope: 2/3
y intercept: - 2
x-0,3
y - 3 0
Answer:
graph C
Step-by-step explanation:
If 3x−y=12, what is the value of
8x
2y
?
If 3x-y=12, what is the value of 8x/2y?
Answer:
[tex]\frac{8x}{2y} =\frac{4x}{3x-12}[/tex]
Step-by-step explanation:
[tex]3x-y=12[/tex]
[tex]-y=12-3x[/tex]
[tex]y=3x-12[/tex]-------------------------(equation 1)
Now,
[tex]\frac{8x}{2y} =\frac{8x}{2(3x-12)}[/tex]---------(from equation 1)
[tex]=\frac{8x}{6x-24}[/tex]
[tex]=\frac{8x}{2(3x-12)}[/tex]
[tex]=\frac{4x}{3x-12}[/tex]
Therefore, the value of [tex]\frac{8x}{2y} =\frac{4x}{3x-12}[/tex]
The first amd third term of an Arithmatic progression are x and y respectively. Find the sixteenth term of x and y
[tex]tn = a + (n - 1)d[/tex]
Answer:
The sixteenth term is (7.5y - 6.5x).
Step-by-step explanation:
The first term of the A.P. is given to be x and the common difference is assumed to be d.
So, the third term = y = x + (3 - 1)d {Given that the third term is y}
Then, 2d = y - x
⇒ [tex]d = \frac{y - x}{2}[/tex]
Therefore, the sixteenth term of the A.P. will be = x + (16 - 1)d
= [tex]x + 15 \times \frac{y - x}{2}[/tex]
= x + 7.5y - 7.5x
= 7.5y - 6.5x (Answer)
Answer:
The sixteenth term is [tex]x+\frac{15(y-x)}{2}[/tex].
Step-by-step explanation:
Given,
[tex]a_1=x[/tex]
[tex]a_3=y[/tex]
And also given, [tex]T_n=a+(n-1)d[/tex]
We have to find out the 16th term of given A.P.
Firstly, we will find out the common difference(d).
Common difference(d) is calculated by given formula.
[tex]T_3=a+(n-1)d[/tex]
On putting the values, we get;
[tex]y=x+(3-1)d\\\\y=x+2d\\\\2d=y-x\\\\d=\frac{y-x}{2}[/tex]
Now the value of 'd' is calculated, so we can find out the 16th term by using the formula.
[tex]T_{16}=x+(16-1)\frac{y-x}{2}\\\\T_{16}=x+15\times\frac{y-x}{2}\\\\ T_{16}=x+\frac{15(y-x)}{2}[/tex]
Hence The sixteenth term is [tex]x+\frac{15(y-x)}{2}[/tex].
Write in slope-intercept form an equation of the line that passes through the given points.
(-2,-2),(4,10)
Express as a fraction or a mixed number: [tex]33\frac{1}{3}[/tex]%
33.3...% = 1/3.
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Answer: 33.3 or 1/3
Step-by-step explanation:
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What is the value of y in the equation 2(3y + 7 + 5) = 196 − 16? (1 point) Group of answer choices 13 14 26 28
Answer:
26
Step-by-step explanation:
2(3y+12)=180
3y+12=90
3y=78
y=26
Answer:
Option c) is correct.
The value of y in the given equation is 26 ie., y=26
Step-by-step explanation:
Given equation is
[tex]2(3y+7+5)=196-16[/tex]
Now to the find the value of y in the above equation.
To find y simplify the above equation
[tex]2(3y+7+5)=196-16[/tex]
[tex]2(3y+12)=180[/tex]
Now apply distributive property
[tex]6y+24=180[/tex]
[tex]6y=180-24[/tex]
[tex]=\frac{156}{6}[/tex]
Therefore y=26
Option c) is correct.
The value of y in the given equation is 26 ie., y=26
Find the variable x.
Answer:
x = 7
Step-by-step explanation:
The inscribed angle (5x - 3) is equal to half the measure of the intercepted arc
5x - 3 = 0.5(9x + 1) ← multiply both sides by 2
10x - 6 = 9x + 1 ( subtract 9x from both sides )
x - 6 = 1 ( add 6 to both sides )
x = 7
help will make brainliest! consider the given function of an arithmetic sequence.
f(n) = 7n - 3
what is the 8th term of the sequence?
Answer:
53
Step-by-step explanation:
f(n) = 7n - 3
f(8) = 7*8 - 3 = 56 - 3 = 53
Final answer:
To find the 8th term of the arithmetic sequence given by f(n) = 7n - 3, substitute n with 8 and calculate the result to get 53.
Explanation:
The question is about finding the 8th term of an arithmetic sequence. The function for the sequence is given as f(n) = 7n - 3. To find the 8th term, we substitute n with 8 in the function. So, f(8) = 7(8) - 3. Calculating the value, we get f(8) = 56 - 3 = 53.
So, the 8th term of the sequence is 53. This result is obtained by applying the formula for the general term of an arithmetic sequence, where f(n) represents the term at position n. In this sequence, each term is obtained by adding 7 to the previous term.
The constant difference between successive terms (7 in this case) is a characteristic feature of an arithmetic sequence. Therefore, the 8th term of the sequence is 53.
Explain how to model represents 5 divided by 1/3 = 15
Answer:
Step-by-step explanation:
5 ÷ 1/3
= 5 × 3/1
= 15
Which ordered pair is a solution of the equation?
-3x+4y=14
A- Only (2,5)
B- Both (2,5) and (4,6)
C-Neither
Final answer:
The ordered pair (2,5) satisfies the equation -3x+4y=14, making it the correct solution, while the ordered pair (4,6) does not satisfy the equation.
Explanation:
To determine which ordered pair is a solution to the given linear equation -3x+4y=14, we need to plug in the x and y values from each pair into the equation and see if the equation holds true.
For the ordered pair (2,5), substituting x with 2 and y with 5 gives us:
-3(2) + 4(5) = -6 + 20 = 14Since the equation is satisfied, (2,5) is a solution to the equation.
For the ordered pair (4,6), substituting x with 4 and y with 6 gives us:
-3(4) + 4(6) = -12 + 24 = 12Since -12 + 24 does not equal 14, the equation is not satisfied, and hence, (4,6) is not a solution to the equation.
Therefore, the correct answer is A- Only (2,5)
Which equation can be use to solve for x in the parallelogram below ?
Answer:
Below.
Step-by-step explanation:
I can't read it very well but one equation might be
2x + 8 = 3x - 12
(because the opposite sides of a parallelogram are congruent.
Explanation:
Opposite angles of a parallelogram are equal.
B. (3x - 12)° = (2x + 8)°
This equation can be used to solve x.
3x - 12 = 2x + 8
3x - 2x = 12 + 8
x = 20°
Verification:
3(20) - 12 = 2(20) + 8
60 - 12 = 40 + 8
48° = 48°
Hence, verified.
please help brainlyest+10 points=0ne big thank u if u cant see sorry
What is the value of the expression shown below?
8
8 and 1 over 6
8 and 1 over 8
79
Evaluate.
Follow PEMDAS.
7+(10-4)²÷4×(1/2)³
parentheses and exponents first
7+36÷4×(1/8)
multiplication next
7+9×(1/8) ----> 7+(9/8)
addition
8 1/8
answer: third choice
help ill give you 20 points
Answer:
The top left graph is the correct one.
Step-by-step explanation:
The graph of y = 1/2x - 4 will rise to the right , have a slope of 1/2 and pass through the point (0, -4) on the y-axis.
Since the inequality sign is 'less than or equal to' the line will be continuous and the shading will be below this line.