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3 years ago

Twice the sum of x and y decreased by 21

1 answer:

8 0

Answer: 2((x+y)-21)

Calculation/Explanation:

Twice the sum of x and y decreased by 21 means that you must add x and y first before decreasing by 21. The last step is to double the whole equation that we just performed.

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Add or subtract.<br> 7z^2 − 2z^4 − 2z^2 − 5z^4

Maksim231197 [3]

Answer:

5z^2-7z^4

Step-by-step explanation:

3 0

3 years ago

If PN=29cm and MN=13 , then PM=?

HACTEHA [7]

*see attachment for the figure referred to

Answer/Step-by-step explanation:

1. PN = 29

MN = 13

PM = ?

$PN = PM + MN$ (Segment addition postulate)

$PN - MN = PM$ (subtract MN from each side)

$29 - 13 = PM$ (substitute)

$16 = PM$

$PM = 16 cm$

2. PN = 34, MN = 19, PM = ?

$PN = PM + MN$ (sediment addition postulate)

$PN - MN = PM$ (subtract MN from each side)

$34 - 19 = PM$ (substitute)

$15 = PM$

$PM = 15 cm$

3. PM = 19, MN = 23, PN = ?

$PN = PM + MN$ (Segment addition postulate)

$PN = 19 + 23$ (substitute)

$PN = 42 cm$

4. MN = 82, PN = 105, PM = ?

$PN = PM + MN$ (segment addition postulate)

$PN - MN = PM$ (subtract MN from each side)

$105 - 82 = PM$ (substitute)

$23 = PM$

$PM = 23 cm$

5. PM = 100, MN = 100, PN = ?

$PN = PM + MN$ (Segment addition postulate)

$PN = 100 + 100$ (substitute)

$PN = 200 cm$

7 0

3 years ago

Valerie is 64 inches tall about how tall is Valeriein centimeters

AlexFokin [52]

162.56 woulf be ur answer

4 0

3 years ago

Read 2 more answers

Anyone know this? Please help thanks

bonufazy [111]

The answer should be 4. When you add 4 to the y-intercept of f(x), you get y=2. I hope this helps!

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3 years ago

Pls help find the area of the smaller sector.

Lunna [17]

I'm good at math but Idk this sorry

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3 years ago