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olasank [31]
3 years ago
14

Which expression is equivalent to 81 + 18?

Mathematics
2 answers:
Dima020 [189]3 years ago
3 0

Answer:

  • A. 9(9 + 2)

Step-by-step explanation:

81 + 18 = 99

  • A. 9(9 + 2) = 99, correct
  • B. 9(9 + 9) = 198 ≠ 99
  • C. 9(9 + 3) = 108 ≠ 99
  • D. 3(27 + 18) = 135 ≠ 99
Marat540 [252]3 years ago
3 0

Answer:

9(9+2)

Step-by-step explanation:

81+18=99

Now

\\ \rm\Rrightarrow 9(9+2)

\\ \rm\Rrightarrow 81+18

\\ \rm\Rrightarrow 99

Hence verified.

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What is the approximate square root of 12 to the nearest integer
Licemer1 [7]

Answer:

3

Step-by-step explanation:

3² =  9, so  √9 = 3

4² = 16, so √16 = 4.

12 is closer to 9 than to 16, so √12 is closer to √9 than to √16.

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4 years ago
A battery is charged. The percentage of the battery’s capacity that is charged as a function of time (in minutes) is graphed.
igor_vitrenko [27]

Answer:

  A- 12 percent

Step-by-step explanation:

You can see on the graph that the charged percentage of capacity changes from 40 to 50 in 5 minutes. Then the increase in 6 minutes will be slightly more than 10 percent.

The linear rate is (10%)/(5 min) = 2%/min, so in 6 minutes it will be

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Every 6 minutes, 12 percent is added to the capacity.

3 0
3 years ago
Please help with this?
Semmy [17]

Answer: Subtract 3 from each side of the equation(A)

Step-by-step explanation:

3n2−15n=3

1:Subtract 3n2 from both sides.

-15n=3-3n2

2:Divide both sides by -15.

-15n/-15=3-3n2/-15

3:Dividing by −15 undoes the multiplication by −15.

n=3-3n2/-15

4:Divide 3−3n 2 ​ by −15

n=n2-1/5

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4 0
3 years ago
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