3 years ago

Please help me! 10 points

Mathematics

1 answer:

Lerok [7]3 years ago

5 0

the answer is d or the last one

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Answer:

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Step-by-step explanation:

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3 years ago

Which of the following ordered pairs is a solution to the equation 2x+7y=8?

Allisa [31]

Plug the values (x,y) into the equation and check if they satisfy the equation.

$(3,-2) \\
2 \times 3 + 7 \times (-2)=8 \\
6-14=8 \\
-8=8 \\
not \ true \\ \\
(2,-3) \\
2 \times 2+7 \times (-3)=8 \\
4-21=8 \\
-17=8 \\
not \ true$

$(-3,2) \\
2 \times (-3)+7 \times 2=8 \\
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8=8 \\
true \\ \\
(0,4) \\
2 \times 0+7 \times 4=8 \\
0+28=8 \\
28=8 \\
not \ true$

The answer is C.

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3 years ago

Rationalize the denominator and simplify.

Irina18 [472]

Answer:

$\frac{3 \sqrt{2} - 2 \sqrt{3} }{3 \sqrt{2} + 2 \sqrt{3} } \times \frac{3 \sqrt{2} - 2 \sqrt{3} }{3 \sqrt{2} - 2 \sqrt{3} } \\ \\ = \frac{18 + 12 - 12 \sqrt{6} }{18 - 12} \\ \\ = \frac{30 - 12 \sqrt{6} }{6} \\ \\ = 5 - 2 \sqrt{6}$

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3 years ago

What's the difference between a rational number and an irrational number. Give one example of each.

Alenkasestr [34]

Answer: A rational number is any value that can be expressed as a ratio of two integers. An irrational number is any value that cannot be expressed as a ratio of two integers.

Rational 4 and 1/4

Irrational π and √3

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3 years ago

What’s the answer to -x= -14 How do you do it?

denis23 [38]

Step-by-step explanation:

multiply both sides by -1

x = 14

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3 years ago