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Novay_Z [31]
3 years ago
9

Kat is painting the edge of a triangular stage prop with reflective orange paint. The lengths of the edges of the triangle are (

3x –
4) feet, (x2 - 1) feet, and (2x2 - 15) feet. What is the perimeter of the triangle if x = 4?
Mathematics
1 answer:
Eva8 [605]3 years ago
3 0
Plug 4 in for every x

(3*4)-4=8
(4^2)-1=15 [(4^2) is 4*4]
(2*(4^2))-15= 15 [because of PEMDAS the exponent comes first and then multiply by 2 then subtract]

Perimeter is the sum of the lengths so add up all the sides from above
8+15+15=38
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I will mark you brainlist!
prisoha [69]

Answer:

the answer is b

Step-by-step explanation:

if it is higher the 3 as you stated it would most likely be b because of it being higher than three so prosecss of elimination you would get b

5 0
3 years ago
4 pencils and 3 crayons are 20.9 inches. 5 pencils and 4 crayons are 26.5 inches. Each pencil is the same length as the other pe
erastova [34]

Answer:

The length of the pencils is 4.1 inches and for the crayons 1.5 inches

Step-by-step explanation:

We can solve by means of a 2x2 system of equations, we have to:

let "x" be the length of the pencils

let "y" be the length of the crayons

4 * x + 3 * y = 20.9

5 * x + 4 * y = 26.5 => x = (26.5 - 4 * y) / 5

Replacing:

4 * (26.5 - 4 * y) / 5 + 3 * y = 20.9

21.2 - 3.2 * y + 3 * y = 20.9

-0.2 * y = 20.9 - 21.2

y = -0.3 / -0.2

y = 1.5

now for x:

x = (26.5 - 4 * 1.5) / 5

x = 4.1

This means that the length of the pencils is 4.1 inches and for the crayons 1.5 inches

5 0
3 years ago
A circle has diameter of 8 feet.
grin007 [14]
<h2><u>25.1 feet</u> is the circumference!</h2><h3>(Assuming pi equals 3.14)</h3><h3></h3><h3>8 x 3.14 = 25.12</h3><h3>25.12 rounds to 25.1</h3><h3 /><h3><em>Please let me know if I am wrong.</em></h3>
8 0
3 years ago
What is negative 1 equals 5+x/6?
Annette [7]

Hello there,

The equation that is give to us is as follows:

  • -1 = 5 + \frac{x}{6}

In order to solve for x we would first subtract 5 from both sides and then multiply by 6:

  • -1 -5 = -6 ÷ 6 = -1

This means that x would equal to -1 given the equation above.

Hope I helped,

Amna

5 0
3 years ago
4n - 2n = 4<br><br>what's the answer for this ?
Mademuasel [1]
Hey there!
First, we will do the subtraction with the two like terms on the left. I know they're like terms because although they have different coefficients, they have the same variable.
We have:
2n=4
Divide both sides by 3 to get:
n = 2
Hope this helps!
5 0
3 years ago
Read 2 more answers
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