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Kitty [74]
3 years ago
12

Megan answered 18 questions correctly on a test. That is 75% of the total number of questions how many questions were on the tes

t?
Mathematics
1 answer:
ivolga24 [154]3 years ago
8 0
Ok so if u know a percent you multiply but you turn your 75 to a decimal so it would be 0.75•18
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PLEASE HELP!<br><br> A) {(7,-3)}<br> B) {(1,2)}<br> C) {(-6, 7)}<br> D) {(2, 1)}
garik1379 [7]

c

c should be the answer to your question. hope that helps

8 0
3 years ago
Find the value of x. Round your answer to the nearest tenth.
natka813 [3]

That's a question about the Pythagorean Theorem.

We use the Pythagorean Theorem to find the value of one side in a right triangle.

This theorem says that:

\boxed{a^2 = b^2 + c^2}

  • <em>a</em> is the hypotenuse (It's the opposite side the right angle).
  • <em>b</em> and <em>c </em>are cathetus (They're the adjacent sides the right angle).

Okay, now, let's go to solve this problem! In our figure, we have two cathetus. Their values are 10 and 7 and we have to find the value of <em>x </em>(the hypotenuse). Let's change this information in that formula.

a^2 = b^2 + c^2\\x^2 = 10^2 + 7^2\\x^2 = 100 + 49\\x^2 = 149\\x = \sqrt{149}

Therefore, the value of <em>x </em>is \sqrt{149}.

I hope I've helped. :D

Enjoy your studies! \o/

5 0
3 years ago
In attempting to calculate the carrying capacity of a cylindrical pipe, Avery measured the outer diameter to be 2 inches, neglec
andreev551 [17]
Volume of the pipe = πr^2l
Wrong measure = π x (2)^2 x l = 4πl
Correct measure = π x (2 - 2(1/8))^2 x l = 49/16πl
error = 4πl - 49/16πl = 15/16πl

% error = ((15/16πl) / 49/16πl) x 100% = 30.6%
4 0
4 years ago
(6+23) x (32-25) + 72<br> I just need to see what the answer is to check my work
Vlad1618 [11]

Answer:

275

Step-by-step explanation:

6+23=29 and 32-25=7

29 x 7 = 203

203 + 72 = 275

The final answer is 275.

Hope this helps!

7 0
3 years ago
URGENT: DUE TONIGHT OR I GET DETENTION!!!!
suter [353]

Answer:

63 weeks

Step-by-step explanation:

252 - 3x = 378 - 5x

       + 5x          +5x

Add 5x to both sides

252 + 2x = 378

-252         - 252

Subtract 252 from both sides

2x = 126

Divide 2 from both sides

x = 63

Check you work by plugging 63 where the x is

252 - 3(63)

252 - 189 = 63

378 - 5(63)

378- 315 = 63

7 0
4 years ago
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