$Let \:the\:length\:be \:x\\Perimeter = 42 cm\\Width = x -7\\\\P = 2(l+b)\\\\42 = 2(x+(x-7))\\\\42 = 2(x +x-7)\\42 = 2(2x-7)\\42 = 4x -14\\Collect\:like\:terms\\\\42+14=4x\\56 = 4x\\\\Divide \:both\:sides\:of\:the\:equation\:by \:4\\\frac{56}{4} = \frac{4x}{4} \\\\14 =x\\Length = 14\\Width = x-7\\Width = 14-7\\\\Width = 7$

7 0

3 years ago

Read 2 more answers

X+y =10<br> Y=-x+10<br> System of equations

katovenus [111]

Answer:

Infinite solutions

Step-by-step explanation:

x + y = 10

y = -x + 10

We'll choose one equation to use, x + y = 10

Substitute y with -x + 10

x - x + 10 = 10

x cancels each other out

10 = 10, which would also mean 0 = 0

This means the answer will validate with any number

3 0

3 years ago

Find the number of groups and the number left over. 24 - 5 = with left over 24-5= with left over (Type whole numbers.)

zimovet [89]

Answer: 19 is my answer 19 is left over

7 0

3 years ago

How to put this in an algebraic expression

likoan [24]

8%w-16%z
I think that this is the answer.

3 0

4 years ago