−4x + 5y = −10
20a − 25b = 50

number one is x= 415=3 43 =3.75

number two is a= 45(b+2)

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)

idn

step-by-step explanation: