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Answer
42
Step-by-step explanation:
Let x be Chris's age before, x+35 be Chris's age now.
2(x+35) = 35+7x
2x+70 = 35 +7x
35=5x
7=x
7+35=42
You find the slope by using the slope intercept form. y=mx+b and m is the slope. so we simplify it to y-7=8x-112. and y=8x-105. and 8/1 is the slope. which is a.
Answer:
168 miles
Step-by-step explanation:
If he uses 5 gallons to drive 140 miles, that means that he can drive 24 miles for every gallon (140/5=24)
7 times 24 is 168 so he can drive 168 miles on 7 gallons of gas
