A. 12 + 4x = 6x + 10 – 2x
b. 5x + 14 – 4x = 23 + x – 9
c. x + 9 – 0.8x = 5.2x + 17 – 8
d. 4x – 2x = 20
which equation has infinitely many solutions?

An equation has infinitely many solutions if it can be manipulated all the way to an identity (i.e. an equality where the right and left hand side are the same). We have:

A)

which is impossible

B)

which is an equality

C)

which has a unique solution

D)

which has a unique solution

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)