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2 years ago

I need some help again

Mathematics

1 answer:

Marrrta [24]2 years ago

4 0

A = small box of oranges

B = large box of oranges

3A + 14B = 203

11A + 11B = 220

Take the second equation and divide it by 11 as both A and B have the same coefficient, which will equal:

$\frac{11A+11B}{11}$ = A + B

220 will also have to be divided by 11, giving you 20

A + B = 20

You can cancel out 3A in the first equation by subtracting 3A + 3B = 60 from it.

11B = 143

143/11 = 13

B (large box of oranges) costs $13.

Substitute 13 for B back into one of our equations, in this case 3A + 3B = 60

3A + 3*13 = 60

3A + 39 = 60

3A = 21

A = 7

Thus:

A small box of oranges costs $7, and a large box of oranges costs $13.

Hope this helped! (please brainliest)

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Answer:

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Step-by-step explanation:

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The test statistics that would be used here Two-sample z proportion statistics;

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where, $\hat p_1$ = sample proportion of drivers 16-24 years old who buckle up = 79%

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The value of z test statistics is -2.946.

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