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Lynna [10]
2 years ago
10

Which expression is equivalent to (3a)-2​

Mathematics
2 answers:
Vera_Pavlovna [14]2 years ago
8 0

Answer:

removing of bracket

Step-by-step explanation:

(3a)-2

3a×(-2)

-6a

mart [117]2 years ago
7 0

Answer:

1/9a2

Step-by-step explanation:

I'm not sure if there's supposed to be a list of answers, but 1/9a2 is one. Hope this helps! Let me know if there was supposed to be a list.

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Find the area of the figure.
givi [52]

these are just two semi-circles, one with a diameter of 22 and the other with a diameter of 30 - 22, or 8, and therefore their radius are 11 and 4 respectively.


\bf \textit{area of a semi-circle}\\\\ A=\cfrac{\pi r^2}{2}~~,~~  \stackrel{r=11}{A=\cfrac{\pi 11^2}{2}}\implies A=\cfrac{121\pi }{2}~~,~~ \stackrel{r=4}{A=\cfrac{\pi 4^2}{2}}\implies A=8\pi \\\\ -------------------------------\\\\ \stackrel{\textit{total area of the figure}}{\cfrac{121\pi }{2}+8\pi }\implies \cfrac{121\pi +16\pi }{2}\implies \cfrac{137\pi }{2}

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2 years ago
kai calculates that he spends 15% of a school day in science class. If he spends 75 minutes in science class, how many minutes d
jasenka [17]
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5 0
3 years ago
Answer correctly and fast please.
Morgarella [4.7K]

Answer:

the answer is 7

Step-by-step explanation:

the right angle is 90°

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5 0
2 years ago
Read 2 more answers
What is the area of angle ABC? Round to the nearest tenth
otez555 [7]
Area formula: L · W · H
Length: 0.5
Width: 5
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Answer: 12.5²

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3 years ago
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Readme [11.4K]

Answer:

The two graphs are perpendicular

Step-by-step explanation:

The slope of the first one is the reciprocal of the second. Also I graphed it.

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