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3 years ago

Alvin’s family used 20.5 gallons of gas to Drive 492 miles. How many miles did they drive on each gallon of gas

Mathematics

2 answers:

Morgarella [4.7K]3 years ago

7 0

Since they use 20.5 gallons in 492 miles you need to divide 492/20.5 which gives you 24

Virty [35]3 years ago

5 0

Answer: 24.0

Step-by-step explanation:

divide 492 and 20.5

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Read 2 more answers

Complete the square than convert to vertex form. y=2x^2+8x-9

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$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

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$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

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