Asap i need help quickly

x = 15

Step-by-step explanation:

Angles in a triangle add up to equal 180

Hence, 3x + 5x + 4x = 180

( Note that we've just created an equation that we can use to solve for x)

We now solve for x using the equation created

3x + 5x + 4x = 180

Combine like terms

12x = 180

Divide both sides by 12

x = 15

x = 15

Step-by-step explanation:

The sum of the angles of a triangle is 180

3x+4x+5x = 180

Combine like terms

12x = 180

Divide by 12

12x/12 =180/12

x = 15

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)

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation: