Question 3
5 pts
Use absolute value to express the distance
between -13 and 17 on the number line. (5
points)
A 1-13 - 171 = -30
B 1-13 - 171 = 30
C 1-13 - 17| = -4
D 1-13 - 170 = 4

                    -30

Step-by-step explanation: -13 subtract 17 = -30

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

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