2 years ago

Write in scientific notation 9,870,000,000,000,000

Mathematics

1 answer:

Lynna [10]2 years ago

7 0

In Scientific Notation: 9.87 x 10^15

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What value of r makes –6r + 2(r + 2) – 5 = -20 true?

OlgaM077 [116]

Hello!

To find the answer we need to solve for r. First we undo the parentheses.

-6r+2r+4-5=-20

Now we combine like terms.

-4r-1=-20

We add one to both sides.

-4r=-19

Divide both sides by -4.

r=4.75

I hope this helps!

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3 years ago

If lines m and n are parallel in the illustration below. Which of the following must be true about

qwelly [4]

Answer:

Step-by-step explanation:

Answer C is correct: Angle T is 95°.

Because the two horiz. lines are parallel, the "vertical angle" of angle T is equal to the "corresponding angle" of 95°.

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Alex73 [517]

Answer:

$67.5\ cm^{2}$

Step-by-step explanation:

we know that

The area of the figure is equal to the area of rectangle (figure 1) plus the area of trapezoid (figure 2)

see the attached figure to better understand the problem

The area of the rectangle is

$A=15*3=45\ cm^{2}$

The area of the trapezoid is

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il63 [147K]

-287 A.D (idk though)

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it just be positive 5

Step-by-step explanation:

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