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pochemuha
3 years ago
12

You earned a 90% on my science test you answer 18 questions correctly how many questions were on the test

Mathematics
2 answers:
Gre4nikov [31]3 years ago
3 0
90% x 18 = 16.2 

Therefore, you answered about 16 questions correctly out of 18. 
valkas [14]3 years ago
3 0
Divide 18 by the score in decimal form .9 to get 20
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If y varies jointly with x and z and y=40 when x=10 and z=9 find z when x =55 and y=105
Eduardwww [97]

Answer:

  z = 189/44

Step-by-step explanation:

The "varies jointly" relationship can be expressed by ...

  y = kxz

We can find k from the given values.

  40 = k(10)(9)

  40/90 = k = 4/9 . . . divide by the coefficient of k

Now we want to find z for given values of x and y. That can be found from ...

  y = (4/9)xz

  9y/(4x) = z . . . . . multiply by 9/(4x)

Filling in the new numbers, we have ...

  z = 9·105/(4·55)

  z = 4 13/44 = 189/44 ≈ 4.2954...(repeating 54)

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3 years ago
Y=2 + x; use x= 1, and y= 2
torisob [31]
Y=2+1
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3 years ago
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Ierofanga [76]

Answer:

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Where is the graph?

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