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3 years ago

I need help with #17

Mathematics

1 answer:

Orlov [11]3 years ago

3 0

The van's consumption is 200/10 = 20 miles per gallon

so for 480 miles we need 480 / 20 = 24 gallons

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8(x + 7) - 12 = 0 can you solve the following inverse <br>

vampirchik [111]

Answer:-11/2

Step-by-step explanation:

7 0

2 years ago

a car reduced its speed in a ratio of 2 to 3 if the final speed was 90 km per hour then what was the original speed.

Licemer1 [7]

Answer:

Orginal Speed is 135

Step-by-step explanation:

The ratio of final speed: original speed is

$\frac{2}{3\\}$

We know that 90 km is it final speed so, we set up a proportion

$\frac{2}{3} =90/x$

$2x=270\\x=135$

8 0

2 years ago

A car's velocity changes at a rate of 36 miles per hour in 0.5 hour.

kotegsom [21]

Answer:

Step-by-step explanation:

In order to find the acceleration we need first to defined it, so:

acceleration=((final velocity)-(initial velocity))/time interval

$a=(vf-vi)/dt$

But (vf-vi) actually represents the velocity change, so (vf-vi)/dt represents the velocity change rate. This means that in our case:

$a=(36miles/hour)/(0.5hours)$

$a=72miles/hour^2$

In conclusion the acceleration is $a=72miles/hour^2$ , without units just 72.

7 0

3 years ago

12a - 6 + 7a - 2a ; a = 4<br> Need help please

Novosadov [1.4K]

Answer:

Step-by-step explanation:

Plug in the value of a in the equation:

12(4) - 6 + 7(4) - 2(4)

Solve 12(4) - 6:

12(4) - 6 = 48 - 6 = 42

Solve 7(4) - 2(4):

7(4) - 2(4) = 28 - 8 = 20

Combine both answers (42+20):

42+20 = 62

Complete answer:

12(4) - 6 + 7(4) - 2(4) = 62

3 0

3 years ago

What is an equation of the line that passes through the points (-2,-5) and (-1,1)

alekssr [168]

Answer:

Slope = 6

Step-by-step explanation:

Slope = $\frac{y^{2}-y^{1} }{x^{2}-x^{1} } =\frac{1-(-5)}{-1-(-2)}=\frac{1+5}{-1+2}=\frac{6}{1}=6$

6 0

2 years ago