$\frac{y_ 2 - y_ 1 }{x_ 2 -x_ 1 } = \frac{y - y_ 1}{x - x_ 1} \\ \frac{10 - 7}{2 + 1} = \frac{y - 7}{x + 1} \\ \frac{y -7}{x + 1} = 1 \\ y -7 = x + 1 \\ x-y=-8$

6 0

3 years ago

Any know how do these problems?

Ksju [112]

13. (6-9)^-3= -1/27 or -0.04(rounded to nearest hundredth.
15. 4^-1+(5-7)^-2= 1/2 or .5

3 0

3 years ago

Write the following as an algebraic expression. Then simplify.

Romashka [77]

Answer: A. 7x + 3

Concept:

Here, we need to know how to find the perimeter of a triangle

Perimeter (triangle) = s₁ + s₂ + s₃

s₁ = side one

s₂ = side two

s₃ = side three

Solve:

Given information

s₁ = 3x

s₂ = 3x + 3

s₃ = x

Given expression

P = s₁ + s₂ + s₃

Substitute values into the expression

P = (3x) + (3x + 3) + (x)

Combine like terms

P = (3x + 3x + x) + (3)

P = (6x + x) + 3

$\boxed{P_{triangle}=7x+3}$

Hope this helps!! :)

Please let me know if you have any questions

3 0

3 years ago