Question 3 (1 point)
What is the value of x in the equation 2.5х + 10 = X - 0.5?
О а з
Oь 7
О с -7
0 d -3

C

Step-by-step explanation:

Given

2.5x + 10 = x - 0.5 ( subtract x from both sides )

1.5x + 10 = - 0.5 ( subtract 10 from both sides )

1.5x = - 10.5 ( divide both sides by 1.5 )

x = - 7 → C

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

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)