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andriy [413]
3 years ago
14

How to solve the question

Mathematics
2 answers:
Pani-rosa [81]3 years ago
4 0
It should be 90cm
So it says 20cm multiply that by2 which is 40
Then add all the 10.
That is it!
Norma-Jean [14]3 years ago
4 0
Find area of quadrant with radius 10 cm and subtract the triangle. Multiply that by 2 for area at right corner. Let’s call this K
Find area of quadrant with radius 20 cm and subtract a semicircle and square with area of 100 cm^2. Add K to get answer.
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What the correct answer
Nataliya [291]
  • Answer:

381.51 ft³

  • Step-by-step explanation:

V(sphere) = \frac{4}{3}\pi*r^{3}

V = \frac{4}{3}*3.14*(4.5ft)^{3}

=4*3.14*91.125ft³/3

= 1144.53ft³/3

= 381.51 ft³

8 0
2 years ago
True or false? In an isosceles triangle all sides are unequal.
Bogdan [553]
False, an isosceles triangle has 2 equal sides.
3 0
3 years ago
Read 2 more answers
Express 79.2% as a decimal. <br> A. .792 <br> B. 7.92 <br> C. .79 <br> D. .0792
N76 [4]
The trick to changing percent to decimal and decimal to present is simple

From percent to decimal : move the decimal place two places to the left and remove percent sign.

From decimal to percent: Move the decimal place two places to the right and put a percent sign.

Sooooo....
When you move the decimal - 79.2% - to the left two time - .792 - the answer left would be
A. 0.792

6 0
2 years ago
Read 2 more answers
The sum of two complementary angles is 90° Angle A is represented by 3x - 10, and Angle B is represented by x. Solve for x Hint:
Nataly [62]

Angle A = 3x - 10

Angle B = x

Their angle sum = 90° ( complementary angles form 90° )

This can be written in an equation as =

= 3x - 10 + x = 90

= 3x + × + ( -10 ) = 90

= 4x + (-10) = 90

= 4x = 90 + 10 ( transposing-10 from LHS to RHS changes-10 to +10 )

= 4x = 100

= x = 100 ÷ 4 ( transposing ×4 from LHS to RHS changes ×4 to ÷4 )

= x = 25

Angle A = 3x - 10

= 3 × 25 - 10

= 75 - 10

= Angle A = 65°

Angle B = x = 25°

Their sum = 65 + 25 = 90°

Therefore , the complementary angles , Angle A = 65° and Angle B = 25° .

6 0
3 years ago
Whoever helps me with this I'll give brainliest and extra points! :)
Musya8 [376]

What are the options

6 0
2 years ago
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