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Dmitriy789 [7]
3 years ago
14

There are 7 trucks for every 5 cars . If there are 21 trucks, how many cars are there?

Mathematics
2 answers:
GenaCL600 [577]3 years ago
6 0

Answer:

15 cars

Step-by-step explanation:

If there are 7 trucks for every 5 cars, the ratio is 7:5. So if there are 21 trucks, that's 7 x 3, which means we also multiply 5 by 3 = 15

n200080 [17]3 years ago
3 0
I think that there would be 15 cars
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Hey there!

y = -2x + 19
y = x + 7

We gonna solve this system of equation by using the substitution method.

We wanna solve y = -2x + 19 for y

Let start by substitute -2x + 19 for y in y = x + 7

y = x + 7
-2x + 19 = x + 7

Subtract x from both sides

-2x + 19 - x = x + 7 - x

-3x + 19 = 7

Now subtract 19 on both sides

-3x + 19 - 19 = 7 - 19

-3x = -12

Then divide both sides by -3

-3x/-3 = -12/-3

x = 4

We have the value of x. Now we gonna use that same value to find the value for y.

We gonna do that by substitute 4 for x in y = -2x + 19

y = -2x + 19

y = -2(4) + 19

y = -8 + 19

y = 11

Thus,

The answer is: x = 4 and y = 11

Let me know if you have questions about the answer. As always, it is my pleasure to help students like you!
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3 years ago
On a piece of paper, graph this system of inequalities. Then determine which
Daniel [21]
The answer is C, Region A.
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2 years ago
Pls help!!
masha68 [24]

Answer:

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Step-by-step explanation:

From the diagram attached,

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From the question,

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A = [(22/7)×7²×150/360]-[(1/2)×7²×sin150]

A = 64.17-12.25

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3 years ago
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Andrej [43]
M=p=x
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6 0
3 years ago
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Basile [38]

Answer:

Step-by-step explanation:

Switch sides:

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Simplify to give:

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