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serg [7]
2 years ago
9

Please help on this math question. Will be marked as BRAINLEST!

Mathematics
2 answers:
leonid [27]2 years ago
6 0

Answer:

20

Step-by-step explanation:

25 \times 25 - 15 \times 15 = 400

\sqrt{400}  = 20

emmainna [20.7K]2 years ago
3 0

Answer:

b=√400

=20

Step-by-step explanation:

15^2+b^2=25^2

225 + b^2=625

b^2=625-225

b^2=400

b=√400

b=20

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Answer: Randomly assign the 1,200 students to <u>6 equal-sized</u> groups. Then select one of the groups and place their names in the bin. Randomly select the winner from the bin.

Step-by-step explanation:

     First, let us see how many bins we will need in total.

1,200 students / 200 notecards per bin = 6 bins

     Now, the first two options do not give all students a fair chance of winning. They are not our answer.

     The last two have a different number of groups. Looking at the calculation we did earlier, we will need 6 equal-sized groups. This means our answer is the last option.

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2 years ago
What is the answer of a+3−a?(it has to be simplified)
liubo4ka [24]
The ancer is 3 i worked it out

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3 years ago
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Step-by-step explanation:

5 0
2 years ago
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There are 30 students in a classroom. The ratio of boys to girls is 2:3.
Arisa [49]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

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12 / 18 + x = 1/5

Cross multiply:

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Subtract 18 from both sides:

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<h3><u>✽</u></h3>

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2 years ago
Roy has a total of 10 quarters and dimes. The value of the coins is $2.05. He has more quarters then dimes. How many of each coi
Bond [772]

Answer:

Step-by-step explanation:

9 quarters and 8 dimes

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