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alekssr [168]
4 years ago
10

Solve the following system of equations using substitution.

Mathematics
1 answer:
dolphi86 [110]4 years ago
6 0
It's A. If U=16, 6+10=16
and if you plug in the numbers for the second equation it's 36=2(10)+16
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Step-by-step explanation:

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3 years ago
A car is driving away from a crosswalk. The formula d = t2 + 2t expresses the car's distance from the crosswalk in feet, d, in t
alukav5142 [94]

Answer:

8 feet per second.

Step-by-step explanation:

We have been given that a car is driving away from a crosswalk. The formula d=t^2+2t expresses the car's distance from the crosswalk in feet, d, in terms of the number of seconds, t, since the car started moving.

We will use average change formula to solve our given problem.

\text{Average change}=\frac{f(b)-f(a)}{b-a}

\text{Average change}=\frac{d(5)-d(1)}{5-1}

\text{Average change}=\frac{(5)^2+2(5)-((1)^2+2(1))}{4}

\text{Average change}=\frac{25+10-(1+2)}{4}

\text{Average change}=\frac{35-3}{4}\\\\\text{Average change}=\frac{32}{4}\\\\\text{Average change}=8

Therefore, the the car's average speed over the given interval of time would be 8 feet per second.

8 0
3 years ago
The best or first answer will be marked brainliest
Marysya12 [62]

Answer:

Need more infomation to write the equation.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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