Answer:
first one
Step-by-step explanation:
60 miles /2.5 gallons is 24 miles / gallon
Answer:
x = ± 4
y = - 2
Step-by-step explanation:
y = 0.5x² - 10 ------------------------(I)
y = -x² + 14 ------------------------(II)
Substitute the y value in equation (II)
0.5x² - 10 = -x² + 14 {Add x² to both sides}
0.5x² + x² -10 = 14 {combine like terms}
1.5x² - 10 = 14 {Add 10 to both sides}
1.5x² = 14 + 10
1.5x² = 24 {Divide both sides by 1.5}
1.5x²/1.5 = 24/1.5
x² = 16
x = ±4
Substitute x = 4 in (I)
y = 0.5 * 4² - 10
= 0.5*16 - 10
= 8- 10
y = -2
Substitute x = -4 in (I)
y = 0.5 * (-4)² - 10
= 0.5*16 - 10
= 8- 10
y = -2
The answer is (-1,1)
The solution is the point where the two lines cross each other
Hope this helps
Choice B:
The line intersects at both points (0,-3) and (1,0)
(I can not specifically see the number on the grid if there is any but that is what I would put for the answer based on what I see)
If you want me to explain it more I can try to! :)
I hope this helps
