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3 years ago

70 points for 7 questions answer. math...please and thank you

Mathematics

2 answers:

a_sh-v [17]3 years ago

7 0

Answer:

6. Actual length is 8 mm.

7. 13

8. 4

9. x=12

10. y=4

11. a=-3

12. y=-5

Step-by-step explanation:

miskamm [114]3 years ago

5 0

Answer:

Yeah

Step-by-step explanation:

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Write the percent as a decimal. 13. 47.63%

earnstyle [38]

Answer:

0.4763

Step-by-step explanation:

in order to write percents as decimals, you always move the decimal to places to the left.

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What is -0.75p-2=0.25p

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you move first the number without the variable to the other side with the opposite sign

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-0.75p=2.25

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Which ordered pairs are solutions to the inequality 2x+y>−4?

hichkok12 [17]

we will proceed to resolve each case to determine the solution

we have

$2x+y>-4$

$y>-2x-4$

we know that

If an ordered pair is the solution of the inequality, then it must satisfy the inequality.

case a) $(5,-12)$

Substitute the value of x and y in the inequality

$-12>-2*5-4$

$-12>-14$ ------> is True

therefore

the ordered pair $(5,-12)$ is a solution of the inequality

case b) $(-3,0)$

Substitute the value of x and y in the inequality

$0>-2*-3-4$

$0>2$ ------> is False

therefore

the ordered pair $(-3,0)$ is not a solution of the inequality

case c) $(-1,-1)$

Substitute the value of x and y in the inequality

$-1>-2*-1-4$

$-1>-2$ ------> is True

therefore

the ordered pair $(-1,-1)$ is a solution of the inequality

case d) $(0,1)$

Substitute the value of x and y in the inequality

$1>-2*0-4$

$1>-4$ ------> is True

therefore

the ordered pair $(0,1)$ is a solution of the inequality

case e) $(4,-12)$

Substitute the value of x and y in the inequality

$-12>-2*4-4$

$-12>-12$ ------> is False

therefore

the ordered pair $(4,-12)$ is not a solution of the inequality

Verify

using a graphing tool

see the attached figure

the solution is the shaded area above the line

The points A,C, and D lies on the shaded area, therefore the ordered pairs A,C, and D are solution of the inequality

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