Find the area of this regular polygon round to nearest tenth

The perimeter of a triangle is just adding all the sides.

So, (2x)+(4x-2)+(3x-1)= 9x-3

So, the answer is D, 9x-3

Answer:

D.

Step-by-step explanation:

The perimeter = the sum of the 3 sides.

Perimeter = 2x + 4x - 2+ 3x - 1

=  9x - 3.

Answer:

the correct answer is the 3rd one

Answer:

the third option is correct

Step-by-step explanation:

Answer:

  one solution is (0, -2)

Step-by-step explanation:

The line y = -x is the boundary of the solution space of the first inequality. The less-than symbol (<) tells you that the line will be dashed and the shading will be below it. The line has a slope of -1 and goes through the y-intercept point (0, 0).

The line y = x - 2 is the boundary of the solution space for the second inequality. The less-than-or-equal-to symbol (≤) tells you the line will be solid (or equal to) and the shading will be below it (less than). The line has a slope of +1 and goes through the y-intercept point (0, -2).

The area of the graph where the shadings overlap is the solution space for the system of inequalities. Any point in that area will do, including points on the solid line where y < -x. (0, -2) is one such point.

Answer: 1. Common difference= 4 . 2.The sixth term would be -7.

Step-by-step explanation: 1. 13-9=4 and 9-5=4 and 5-1=4. 2. Sixth term: 1-4=-3 And -3-4=-7.

The common difference in Monelle's arithmetic sequence is -4, and the sixth term is -7. For Fin's geometric sequence, the ratio is 1/3, with the sixth term being 2. The formula for the nth term of Fin's sequence is 162 * (1/3)^(n-1).

In mathematical terms, an arithmetic sequence is a number sequence in which the difference between every two successive members is a constant. From the first part of your question, in Monelle's arithmetic sequence: 13, 9, 5, 1,... the common difference can be calculated by subtracting any term from the one that comes after it. In this case, 9 - 13 or 5 - 9 will give us the common difference, which is -4.

Once you've found the common difference, you can calculate the sixth term by taking the first term (13) and adding the common difference (-4) times the number of terms minus 1 (for the sixth term, this would be 5 times). This gives us 13 - 4 * 5 = -7 for the sixth term of Monelle's sequence.

Conversely, a geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the 'ratio'. Looking at Fin's sequence: 162, 54, 18, 6, ..., we can find the ratio by dividing any term by the one before it. So 54 divided by 162, or 18 divided by 54, gives us the common ratio of 1/3. To find the sixth term, we multiply the first term by the ratio raised to the power of (the term's position number minus 1). The sixth term then is 162 * (1/3)^5 = 2.

The expression that represents the ᵗʰ term of Fin's sequence can be written general form as a * r^(n-1), where 'a' is the first term, 'r' is the ratio, and 'n' is the term's position number. In this case, the formula for the nth term of Fin's sequence would be 162 * (1/3)^(n-1).

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Start with the definition of absolute value |x|:

|x| = x  for x>=0

|x| = -x  for x<0

We are given a function f(x) and are asking when is that function = 15.

This means we are asking:

4|x-5| + 3 = 15, or simplified:

|x-5| = 3

but at this point further simplification seems stuck on the absolute value. Time to use the above definition, and we split this into two cases:

|x-5| = 3 -->

Case 1: (x-5) = 3   for (x-5)>=0

Case 2: -(x-5) = 3   for (x-5)<0

and now we can proceed and solve each case separately:

Case 1: x = 8  for x >= 5    

Case 2: x = 2  for x < 5

Give it sharp look and realize that both cases are valid because each case has a solution of an x that is "allowed" by the inequality condition (meaning it is not contradicting it), therefore both solutions

x1 = 2 and x2 = 8

are valid solutions to the equation 4|x-5|+3=15. For both the function f(x) will have the value 15 (and please do verify for yourself!)

The surface area is 104 cm²

The surface area of rectangular prism is given by

A=2 (wl + hl + hw)

by putting the values we get

A =2 ( 2x6 + 5x6 + 5x2)

A = 104

Answer:

EI=6 units

LJ=8 units

ST=9 units

Step-by-step explanation:

step 1

we know that

The triangle ELT is a circumscribed triangle

so

EI=ES

LI=LJ

TS=TJ

EL=EI+LI ------> 14=EI+LI -----> 14=EI+LJ -----> equation A

LT=LJ+TJ----> 17=LJ+TJ ----> 17=LJ+TS ----> equation B

ET=ES+TS ---> 15=ES+TS----> 15=EI+TS ----> equation C  

Subtract equation A from equation C

15=EI+TS

14=EI+LJ

--------------

15-14=TS-LJ

TS=1+LJ ------> equation D

substitute equation D in equation B and solve for LJ

17=LJ+(1+LJ)

17=2LJ+1

2LJ=17-1

LJ=8

Find the value of TS

TS=1+LJ -----> TS=1+8=9

Find the value of EI

14=EI+LJ ------> 14=EI+8 ----> EI=14-8=6

therefore

EI=6 units

LJ=8 units

ST=9 units

Answer:

-1, 4

Step-by-step explanation:

factor out common term 4

4(x^2 - 3x - 4)        find factors of -4      1 (-4)= -4  (c term)  also 1 - 4 = -3  (b term)

4(x+1)(x-4)  = 0

zeros are -1, 4

Answer:

[tex]\large\boxed{x=-1\ or\ x=4}[/tex]

Step-by-step explanation:

[tex]y=4x^2-12x-16\\\\\text{the zeros are for}\ y=0:\\\\4x^2-12x-16=0\qquad\text{divide both sides by 4}\\\\x^2-3x-4=0\\\\x^2+x-4x-4=0\\\\x(x+1)-4(x+1)=0\\\\(x+1)(x-4)=0\iff x+1=0\ \vee\ x-4=0\\\\x+1=0\qquad\text{subtract 1 from both sides}\\\boxed{x=-1}\\\\x-4=0\qquad\text{add 4 to both sides}\\\boxed{x=4}[/tex]

Answer:

y = (5/2)x

Step-by-step explanation:

A proportional relation can be written as ...

y = kx

Solving for k, you divide by x to get ...

y/x = k

The contant of proportionality is the ratio of y to x. Any pair of x and y will do for computing k. The first pair requires no reduction in the fraction that results:

5/2 = k

So, your equation is ...

y = (5/2)x

Answer:

The constant of proportionality is

✔ 2.5

The equation that represents this proportional relationship is

✔ y = 2.5x

Step-by-step explanation:

hope this helps:)

Answer:

A. (x +8) + (-4x+31)/(x^2+2x+1)

Step-by-step explanation:

When you perform long division of polynomials, the first quotient term is the ratio of the highest-degree terms in the numerator and denominator: x^3/x^2 = x.

This fact eliminates all but choices A and C.

The denominator of the remainder term is the denominator of the original expression, so will be x^2 +2x +1, as shown in choice A.

__

So, simply based on a couple of facts about long division (that you learned in the early elementary grades), you can make the correct choice of answer without actually working the problem in detail.

_____

This is a polynomial long division problem. It is worked in virtually the same way that numerical long division problems are worked: first you find a quotient term, then you multiply that by the divisor and subtract the result from the dividend. The difference is the new dividend. These steps are identical to numerical long division.

For polynomial long division, instead of lining up the digits with the same place value, you line up the terms with the same degree of the variable.

As mentioned above, the quotient term is computed only from the highest-degree terms of dividend and divisor, so that part is actually simpler than for numerical long division.

A dividend that is of lower degree than the divisor is considered to be the remainder. As with numerical long division, it can be expressed as a fraction with the divisor as the denominator.

Numerical example: 18/7 = 2 remainder 4 or 2 4/7.

Answer:

B) L ∪ (M ∩ N)={0,10,20,40,80,100}

Step-by-step explanation:

The given sets are;

L = {0, 20, 40, 80, 100}

M = {5, 10, 15, 20, 25}

and

N = {10, 20, 30, 40, 50}

(M ∩ N) are elements in set M and set N

(M ∩ N) ={10,20}

The elements in L ∪ (M ∩ N)  are elements in L or M ∩ N or both

L ∪ (M ∩ N)={0,10,20,40,80,100}

The correct choice is B.

Answer:

B

Step-by-step explanation:

L ∪ (M ∩ N)  means take "common" between M and N and take "sum of that and L".

Let's find (M ∩ N) (common between M and N):

We know

M = {5, 10, 15, 20, 25} , and

N = {10, 20, 30, 40, 50}

Thus, the common elements are 10 & 20, thus (M ∩ N) = {10,20}

Now we have:

L = {0, 20, 40, 80, 100}

(M ∩ N) = {10,20}

So sum of L and (M ∩ N)  are all the unique elements of both the sets. They are 0, 10, 20, 40, 80, 100, or Option B

Answer:

a=216.

Step-by-step explanation:

What you do is you need to get a by itself.

a/6-11=25. You first add 11 to both sides.

a/6=36. Next you will times 6 on both sides to get

a=216 as your answer.

Answer:

1. 42.8 °C

2. Aceves' class: $133.33; Baca's class: $266.67; Canyon's class: $200.

Step-by-step explanation:

1.) The difference between two numbers is found by subtraction. Since we want to report the positive difference, we can subtract the smaller number from the larger:

-21.2 °C - (-64 °C) = (64 -21.2) °C = 42.8 °C

The temperature must drop 42.8 °C more for the antifreeze to solidify.

_____

2.) We want to divide the prize money in the ratio

1200 : 2400 : 1800 = 2 : 4 : 3

There are 2+4+3 = 9 total ratio units, so each one must stand for $600/9 = $66 2/3.

Then the money to Aceves' class is ...

2 × $66 2/3 = $133 1/3 = $133.33

And the money to Baca's class is ...

4 × $66 2/3 = $266 2/3 = $266.67

Finally, the money to Canyon's class is ...

3 × $66 2/3 = $200.00

___

Note on the division:

The 1/3 cent that Aceves' class should have gotten goes to Baca's class in the above scenario. It might make sense for the classes to donate $6 to the school and divide the remaining $594 as $132 : $264 : $198. If they actually want the pennies, they could donate $0.06 to the school and split the result as $133.32 : $266.64 : $199.98.

Answer:

Step-by-step explanation:

Answer:

1. 42.8 °C

2. Aceves' class: $133.33; Baca's class: $266.67; Canyon's class: $200.

Step-by-step explanation:

1.) The difference between two numbers is found by subtraction. Since we want to report the positive difference, we can subtract the smaller number from the larger:

-21.2 °C - (-64 °C) = (64 -21.2) °C = 42.8 °C

The temperature must drop 42.8 °C more for the antifreeze to solidify.

_____

2.) We want to divide the prize money in the ratio

1200 : 2400 : 1800 = 2 : 4 : 3

There are 2+4+3 = 9 total ratio units, so each one must stand for $600/9 = $66 2/3.

Then the money to Aceves' class is ...

2 × $66 2/3 = $133 1/3 = $133.33

And the money to Baca's class is ...

4 × $66 2/3 = $266 2/3 = $266.67

Finally, the money to Canyon's class is ...

3 × $66 2/3 = $200.00

___

Note on the division:

The 1/3 cent that Aceves' class should have gotten goes to Baca's class in the above scenario. It might make sense for the classes to donate $6 to the school and divide the remaining $594 as $132 : $264 : $198. If they actually want the pennies, they could donate $0.06 to the school and split the result as $133.32 : $266.64 : $199.98.

Answer:

A

Step-by-step explanation:

Givens

Find x

x^2 + 3^2 = 5^2

x^2 + 9 = 25                 Subtract 9 from both sides

x^2 = 25 - 9                  Combine

x^2 = 16                         Take the sqrt of both sides

x = 4

Find the height

The ratio of all dimensions involving the 2 ladders and the board is 1 to 2.

So the total height from where the ladders meet to the ground is 2*4 = 8

Answer: The distance from the bucket to the ground is 1/2 * 8 = 4

Answer: A

Answer:

  300 square units

Step-by-step explanation:

Let M be the midpoint of BC. Then AM =20 is the altitude. Let x represent the length BM=MC, and let y represent the length AB=AC. Then the perimeter is ...

  2x +2y = 80

  x +y = 40 . . . . divide by 2 . . . . . [eq A]

The Pythagorean theorem tells us ...

  x^2 + 20^2 = y^2 . . . . . . . y is the hypotenuse of right triangle AMC

Rearranging, we have ...

  y^2 -x^2 = 400

  (y -x)(y +x) = 400

  (y -x)·40 = 400

  y -x = 10. . . . . . . . . [eq B]

Subtracting [eq B] from [eq A], we find ...

  (x +y) -(y -x) = (40) -(10)

  2x = 30

  x = 15

The area of interest is 20x, so is ...

  A = 20·x = 20·15 = 300 . . . . square units

Answer:

  90

Step-by-step explanation:

The total number of "ratio units" is 9+6 = 15, so each one must stand for 225/15 = 15 people. Then 6·15 = 90 people were snowboarders who bought season passes.

The value of x in Problem 1 is 11 degrees. The measures of angles EFO and EFD in Problem 2 are 28 degrees and 84 degrees respectively.

In both problems, we're dealing with geometric principles related to circles and angles.

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1. The value of x is 11

2. angle EFO = 28°

3. angle EFD = 90°

In geometry, the central angle of a circle's arc is equal to the subtended arc's measure.

The relationship is given by

Central Angle = Arc Measure

Central Angle=Arc Measure in degrees. This property is fundamental in circular geometry.

1. Since arc EF = 2x + 10

2x + 10 = 32( angle at the centre equal measure of arc it intercept)

2x = 32 - 10

2x = 22

x = 11

Since FE = 56

EFO = 1/2 × 56 ( angle at the center is 2× angle at the circumference)

EFO = 28°

angle EFD = 90° ( angle substended from the diameter of a circle to the circumference is 90°)

Answer:

see below

Step-by-step explanation:

The figure is completely symmetrical about line RT so ...

ST = UT = 23

RU = RS = 8

SV = UV = 5

SU = SV + UV = 10

Answer:

28 Gallons

Step-by-step explanation:

This one is really easy, so i want you to look at my steps:

1. Gather all given information, container is 3/4, 7 gallons are poured out to make it 1/2 full.

2. Find a common denominator for the fractions 1/2 and 3/4, this would be 4.

3. Make them both the same denominator, 2/4 and 3/4.

4. Subtract the remaining amount from the original amount to see how much 7 gallons made up, 3/4 - 2/4 = 1/4

5. Now that you know that 7 gallons made up 1/4 of the container, you can just multiply 7 by 4 to get the total amount of gallons that can fit in the container.

7 * 4 = 28 gallons is the max that the container can hold.

Answer:

28 gallons

Step-by-step explanation:

Got it right on test

Answer:

The lateral area of the cylinder is [tex]24 \pi\ units^{2}[/tex]

Step-by-step explanation:

we know that

The lateral area of the cylinder is equal to

[tex]LA=2\pi rh[/tex]

step 1

Find the radius of the base of the cylinder

The area of the base is equal to

[tex]A=\pi r^{2}[/tex]

we have

[tex]A=36 \pi\ units^{2}[/tex]

so

substitute and solve for r

[tex]36 \pi=\pi r^{2}[/tex]

Simplify

[tex]r=6\ units[/tex]

step 2

Find the lateral area

we have

[tex]r=6\ units[/tex]

[tex]h=2\ units[/tex]

substitute the values

[tex]LA=2\pi (6)(2)=24 \pi\ units^{2}[/tex]

Answer:

  3.  364

  4.  F  11.45

Step-by-step explanation:

3. 1/18 of the total number of seats in the stadium are found in each section. That number is ...

  1/18 · 6552 = 364 . . . . seats in one section

__

4. The numbers round to tenths as follows:

F — 11.5

G — 11.6

H — 11.3

J — 12.5

Perhaps you can see that the one that rounds to 11.5 is ...

  F  11.45

Answer:

364

Step-by-step explanation:

6552/ 18

-0.7

the quadratic formula is

[tex] \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a} [/tex]

substitute the correct values in

[tex] \frac{ - ( - 5) + - \sqrt{ {( - 5)}^{2} - 4(1)( - 4) } }{2(1)} [/tex]

where it says +- you would type this into your calculator with + AND THEN - to get two separate answers.

when you type + you get the answer of: 5.701562119...

when you type - you get the answer of:

-0.7015621187...

when you round to the nearest tenth you get -0.7

hope this helps! :)

have a great day ~ •lipika•

Answer:

  (2a +b)·(13a^2 -5ab +b^2)

Step-by-step explanation:

The factorization of the difference of cubes is a standard form:

  (p -q)^3 = (p -q)(p^2 +pq +q^2)

Here, you have ...

so the factorization is ...

  (3a -(a -b))·((3a)^2 +(3a)(a -b) +(a -b)^2) . . . . substitute for p and q

  = (2a +b)·(9a^2 +3a^2 -3ab +a^2 -2ab +b^2) . . . . simplify a bit

  = (2a +b)·(13a^2 -5ab +b^2) . . . . . . collect terms

Example:

 a) mutually exclusive

 b) not mutually exclusive

 c) not mutually exclusive

Your Turn:

 a) not mutually exclusive

 b) not mutually exclusive

 c) not mutually exclusive

 d) mutually exclusive

Events are mutually exclusive if they cannot both occur together. Otherwise, they are not mutually exclusive.

Example

 a) the winner cannot be both a junior and a senior — mutually exclusive

 b) the winner could be a female sophomore — not mutually exclusive

 c) the winner could be a male freshman — not mutually exclusive

___

Your Turn

 a) the card could be the ace of clubs — not mutually exclusive

 b) the number could be divisible by both 5 and 10 — not mutually exclusive

 c) the card could be the 5 of hearts — not mutually exclusive

 d) the result cannot be both 6 and 7 — mutually exclusive

Answer:

20

Step-by-step explanation:

30% × ? = 6

? =

6 ÷ 30% =

6 ÷ (30 ÷ 100) =

(100 × 6) ÷ 30 =

600 ÷ 30 =

20

Answer:

No

Step-by-step explanation:

The only consecutive integers that satisfy the Pythagorean theorem are 3, 4, and 5.

___

4^2 ≠ 2^2 + 3^2

16 ≠ 4 + 9 . . . . . . . an attempt at applying the Pythagorean theorem to the given numbers fails.

Final answer:

Using the Pythagorean theorem, a right triangle with legs of 2 inches and 3 inches cannot have a hypotenuse of 4 inches. The correct length of the hypotenuse is the square root of 13, which is approximately 3.61 inches.

Explanation:

To determine whether a right triangle can have sides of 2 inches, 3 inches, and a hypotenuse of 4 inches, we use the Pythagorean theorem. This theorem states that for any right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Mathematically, it's expressed as a² + b² = c².

Let's input the given values into this equation. For the legs measuring 2 inches and 3 inches, the equation would look like this: 2² + 3² = c², which simplifies to 4 + 9 = c². This results in 13 = c². Taking the square root of both sides gives us c = √13. Therefore, the hypotenuse must be the square root of 13, which is approximately 3.61 inches, not 4 inches.

Thus, a right triangle with legs of 2 inches and 3 inches cannot have a hypotenuse of 4 inches. The actual length of the hypotenuse according to the Pythagorean theorem is approximately 3.61 inches.

Answer:

Step-by-step explanation:

The top and the bottom are easiest to find.

Area_top = pi*r^2

r = 1.5

Area_top = 3.14 * 1.5^2

Area_top = 3.14 * 2.25

Area_top = 7.065

But there are 2 of them (top and bottom) which is 14.13

================

Area of the body of the cylinder

Area body = circumference of the circle * height

C = 2*pi*r

r = 1.5

C = 2 * 3.14 * 1.5

C = 9.42

Area body = 9.42 * 5

Area body = 47.1

===================

The sum of both of these is the answer you want

47.1 + 14.13 = 61.23 square inches.

Answer:

  $19,720

Step-by-step explanation:

Put the given numbers into the formula and do the arithmetic.

  P = principal amount, $17,000

  r = interest rate, 8% = 0.08

  t = 2 years

"I" = P + Prt

I = $17000 + $17000·0.08·2 = $17000 +2720

I = $19,720

_____

I put "I" in quotes because the variable capital-I is usually used in this context to refer to the amount of interest paid, not the entire repayment amount. However, that is what your formula is. It works for what you want.

15% answered swimming.

39 people said swimming, so 39 people is 15% of the total people surveyed.

To find the total number of people, divide 39 by 15%:

39 / 0.15 = 260

There were 260 total people surveyed.