Which of the following expressions match the translation “nineteen more than the product of 4 and a number”? 4 + 19n 19(n + 4) 4n + 19 4(n + 19)

4n+19

Step-by-step explanation:

4n + 19

Step-by-step explanation:

In these types of exercises it is usually helpful to start with the end or the second part of the expression.

the sentence is: "nineteen more than the product of 4 and a number"

22

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15