$2(x + 5) = 3(x - 7) \\ \\ \therefore \: 2x + 10 = 3x - 21 \\ \\ \therefore \: 10 + 21 = 3x -2x \\ \\ \therefore \: 31 = x \\ \\ \huge \red { \boxed{\therefore \: x = 31}}$

Hence the required number is 31.

5 0

3 years ago

Find the nonpermissable replacement for y in this expression y+9/1+7

Ugo [173]

<span>y = -7

You cannot divide by 0. If y = -7, the denominator would be 0.</span>

3 0

3 years ago

What is the value of the negative zero of the function, f, defined by<br> f(x) = x^2 - 16

Lelu [443]

Answer:

x = -4

Step-by-step explanation:

f(x) = x² - 16

This is the difference of squares

which factors as

f(x) = (x - 4)(x + 4)

Therefor the negative zero is

x = -4

8 0

2 years ago

The vertex angle of isosceles triangle is 110 degrees. what are the measures of the base angles

dalvyx [7]

Answer:

35°

Step-by-step explanation:

The base angles of an isosceles triangle are congruent , then

base angles = $\frac{180-110}{2}$ = $\frac{70}{2}$ = 35°

3 0

2 years ago