What does this expression represent ?
5-n
a. five more than some number
b. five less than some number
c. some number less than five.
d. some number more than five

the answer is the option C

some number less than five

Step-by-step explanation:

Let

n------> some number

case A) Five more than some number

The expression case A) is

case B) five less than some number

The expression case B) is

case C) some number less than five

The expression case C) is

case D) some number more than five

The expression case D) is

therefore

The expression

represent some number less than five

1: -2 3/4, -2 1/2, -14, 0, 3, 8 1/3

2: -4, -3, -2 1/2, -2 1/4, 3 1/4,

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