The graph shows the relationship between the distance a car is driven and the number of gallons of gasoline used. Identify the value of d in the point (1, d). What does that point represent? A. d=25; the unit rate is 25 miles per gallon

B. d=25; the unit rate is 25 gallons per mile

C. d=50; the unit rate is 50 miles per gallon

D. d=50; the unit rate is 50 gallons per mile

B

Step-by-step explanation:

The "x" coordinate goes before the y coordinate. For example, it is (x, y)

To solve:

When the x coordinate, or the gasoline used (In gallons) is 1, then we need to find what d is.

On the graph, d = 25 miles per gallon.

So, the answer is B.

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