Find the value of x. a.) 2 b.) 4 c.) 6 d.) 8

Step-by-step explanation:

Given triangle is a right angle triangle

To find out x we use Pythagorean theorem

where c is the hypotenuse

c=square root (20),

Plug in the values in the formula

Subtract 20 on both sides

Divide whole equation by 2

0=x^2-2x-8

factor the right hand side

Set each factor =0 and solve for x

so

so

The length x cannot be negative, so

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)