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Charra [1.4K]
3 years ago
7

Helen got an 95% on her math quiz. She had 38 questions right. How many questions were on the quiz?

Mathematics
2 answers:
marshall27 [118]3 years ago
5 0

Answer:

40

Step-by-step explanation:

because 95/100 x 38/1 = 40

Serjik [45]3 years ago
4 0

Answer:

45 is right answer. ..... . .......

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7(x -2) + 3(x + 2) = 5(x - 6)
horsena [70]

Answer: x=  -22/5

Step-by-step explanation:

6 0
3 years ago
The mean of a particular set of 7 numbers is 4. Six of the numbers in the set are known: 1,2,2,5,7,and 8.
Setler [38]
\dfrac{1+2+2+5+7+8+x}{7}=4\\
\dfrac{25+x}{7}=4\\
25+x=28\\
\boxed{x=3}

8 0
3 years ago
Suppose △JMN≅△KQR .
zvonat [6]
The positions of the letters must correspond. Appropriate choices are ...
  ∠M ≅ ∠Q
  QK ≅ MJ
  MN ≅ QR
4 0
3 years ago
A triangle has one leg that measures 12 cm and a hypotenuse 24 cm. Find the length of the other leg to the nearest tenth of cent
Minchanka [31]

9514 1404 393

Answer:

  20.8 cm

Step-by-step explanation:

The term "hypotenuse" suggests this triangle is a right triangle. Then the other leg can be found using the Pythagorean theorem:

  x^2 +12^2 = 24^2

  x^2 = 576 -144 = 432

  x = √432 ≈ 20.8 . . . cm

The other leg is about 20.8 cm.

_____

<em>Additional comment</em>

A right triangle with a short leg that is 1/2 the length of the hypotenuse is the "special" 30°-60°-90° right triangle. The longer leg is √3 times the length of the short leg: 12√3 ≈ 20.8 cm.

7 0
2 years ago
There are three separate, equal-size boxes, and inside each box there are four separate small boxes, and inside each of the smal
katen-ka-za [31]

Answer:

There are 51 boxes all together.

Step-by-step explanation:

Since there are three separate, equal-size boxes, and inside each box there are four separate small boxes, and inside each of the small boxes there are three even smaller boxes, to determine how many boxes are there all together, the following calculation must be done:

3 + 3 x 4 + 3 x 4 x 3 = X

3 + 12 + 36 = X

51 = X

Therefore, there are 51 boxes all together.

6 0
3 years ago
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