Ask question

Ask question

All categories

3 years ago

7

Mr. kelly uses an expression to represent the perimeter of a square. Rewrite the expression to represent the length of a side of

the square. P=8x+20

1 answer:

nikklg [1K]3 years ago

3 0

Answer:

Step-by-step explanation:

P = 8x + 20

4*side = 8x + 20

side = (8x + 20)/4

= 8x/4 + 20/4

side = 2x + 5

You might be interested in

A. 812r) and 100

White raven [17]

Answer is C.9(3r-4) and 27r-36

Step-by-step explanation:

5 0

3 years ago

An equilateral triangle has a perimeter of 48 cm. What is the area?

KiRa [710]

Answer:

$A=64\sqrt{3}\ cm^2$

Step-by-step explanation:

we know that

An <u><em>equilateral triangle</em></u> has three equal sides and three equal interior angles (each interior angle measure 60 degrees)

so

The perimeter is equal to

$P=3b$

where

b is the length side of the equilateral triangle

we have

$P=48\ cm$

substitute

$48=3b$

solve for b

$b=48/3\\b=16\ cm$

Find the area

The formula of area applying the law of sines is equal to

$A=\frac{1}{2}b^2sin(60^o)$

substitute the value of b

$A=\frac{1}{2}(16)^2sin(60^o)$

$sin(60^o)=\frac{\sqrt{3}}{2}$

$A=\frac{1}{2}(16)^2(\frac{\sqrt{3}}{2})$

$A=64\sqrt{3}\ cm^2$

6 0

3 years ago

Ken has made a selection of square jam sandwiches for a party, which he arranges in a single layer on the table in a perfect rec

Vesnalui [34]

Perimetre + 4 = area
Each person must have made 24

8 0

4 years ago

Read 2 more answers

Helppppppp hurry!!!!!!!!!

lys-0071 [83]

5 is your amazing answer

3 0

3 years ago

A salesman travelled 2/5 of his journey before lunch and 3/8 of his journey after lunch.

AysviL [449]

2/5+3/8= 31/40 therefore he still has 9/40 to go.
to get this you multiply the two denominators together
5x8=40 which is your denominator
then you cross multiply the two numerators
2x8=16
3x5=15
to get the final
15/40+16/40=31/40
and you are left with 9/40

7 0

3 years ago