Which equation represents the statement: Three times the sum of a number and 5 is –30? 3n + 5 = -30
3(n+5) = -30
n + 15 = -30
(n + 5) ÷ 3 = -30

Step-by-step explanation:

1. Divide the problem into pieces. The sum of a number and five can be written as , where n is any number.

2. Since the question tells us that this sum is multiplied by 3, we expand the expression to .

3. Finally, the question tells us that this expression is equal to -30. This means we can express the entire statement as the equation .

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a