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Kruka [31]
3 years ago
5

Please help with this question! i will mark you brainliest!

Mathematics
1 answer:
IrinaK [193]3 years ago
4 0

Step-by-step explanation:

3) y=4x-2

since x is already 3, simply substitute

y= 4(3)-2

y=12-2

y=10

second pair for number 3 is 10

4) y=16+7x

since y is already 37, simply substitute

37=16+7x

37-16=7x

21=7x

x=21/7

x=3

second pair for number 4 is 3

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  1. rational
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Step-by-step explanation:

A <em>rational</em> number is one that can be expressed as the ratio of two integers. All fractions that have integer numerators and (non-zero) denominators are <em>rational</em> numbers. Any finite decimal number, or any repeating decimal number, is a rational number. These can always be expressed as the ratio of two integers. For example, 0.4040... = 40/99, and 0.286 = 286/1000.

To make an irrational sum, at least one of the contributors must be irrational. You want an irrational 2-number sum that has 7/8 as one of the contributors. Since 7/8 is rational, the other contributor must be irrational.

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<u>Step 1</u>. The number 7/8 is <em>rational</em>.

<u>Step 2</u>. The desired sum is <em>irrational</em>.

<u>Step 3</u>. The rule <em>rational + </em><em>irrational</em><em> = irrational</em> applies.

<u>Step 4</u>. An <em>irrational</em> number must be chosen.

Step 5. √7 will produce an irrational sum, because <em>it is irrational</em>.

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A certain drug is made from only two ingredients: compound A and compound B. There are 3 milliliters of compound A used for ever
Sphinxa [80]

Answer:

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If there are 3 milliliters of compound A used for every 4 milliliters of compound B, then we can denote that we use 3x milliliters of compound A and 4x milliliters of compound B to get 533 milliliters of the drug. Thus,

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