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2 years ago

Calisickleroye9vh also answer this is last one thx

Mathematics

1 answer:

never [62]2 years ago

7 0

Answer:

see below

Step-by-step explanation:

You can add any multiple of one equation to the other without changing the solution to the system.

In the first answer choice the first equation is added to the second, and the first equation is left alone.

In the third answer choice, the first equation is subtracted from the second, and the second equation is left alone.

___

The other answer choices have strange combinations of sums and differences that result in systems of equations with different answers.

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Step-by-step explanation:

Given

$\begin{array}{cccc}{Score\ Interval} & {f} & {Proportion} & {Percentage} & {9-10} & {29} &{0.19} & {19\%} & {7-8} & {53} & {} & {} &{5-6}& {50} & {} & {} &{3-4} & {22} & {0.14} & {14\%} & {1-2} & {1} & {0.01} & {1\%} \ \end{array}$

Required

Fill in the gaps

First, we calculate the total frequency:

$Total = \sum f$

$Total = 29+53+50+22+1$

$Total = 155$

The proportion (p) is calculated by:

$p = \frac{f}{Total}$

The percentage (P) is calculated by:

$P = p * 100\%$

For interval 7 - 8, we have:

$p = \frac{53}{155} = 0.34$

$P = 0.34 * 100\% = 34\%$

For interval 5 - 6, we have:

$p = \frac{50}{155} = 0.32$

$P = 0.32 * 100\% = 32\%$

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2 years ago

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Step-by-step explanation:

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==================

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