3 years ago

(10×2+99×-5)÷(×+10)=

Mathematics

1 answer:

allochka39001 [22]3 years ago

5 0

The answer to (10 x 2+99 x -5) / (x+10) is 11.4

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Solve for u. 20 − (u · 0.9) = 4.7

alina1380 [7]

Answer:

20 - 0.9u = 4.7

-0.9u = 4.7 - 20

-0.9u = -15.3

Divide both sides by - 0.9

u = 17

Hope this helps.

3 0

2 years ago

Juan and Nina are in the Junior High Orchestra. As part of the orchestra they each have to learn two instruments. Juan is learni

larisa86 [58]

Answer:

Nina practiced the viola for 11.25 hours last week.

Step-by-step explanation:

Juan practiced the violin for 9 hours last week. For each 3 hours that he practices the violin, he practices 2.5 hours of cello. So

3h violin - 2.5h cello

9h violin - xh cello

$3x = 9*2.5$

$x = 7.5$

He practiced 7.5 hours of cello, the same as Nina.

For every 3 hours Nina spends practicing the viola she practices the cello for 2 hours. So:

3h viola - 2h cello

xh viola - 7.5h cello

$2x = 3*7.5$

$x = 7.5*1.5$

$x = 11.25$

Nina practiced the viola for 11.25 hours last week.

7 0

2 years ago

Polynormual sum of (x^2+9)+(-3x^2-11x+4)

amid [387]

Answer:

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Step-by-step explanation:

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2 years ago

Hailey received some cash for birthday. She spent $14.48 on a CD and donated $25.00 to charity. She put half of what was left in

DaniilM [7]

Work backwards.

After she put half of what she had left in, she had 17.76.

Multiply by 2:

17.76 * 2 = 35.52

Add 25:

35.52 + 25 = 60.52

Add 14.48:

75

So she received $75 on her birthday.

8 0

2 years ago

Read 2 more answers

The graph of x < 3 or x > 5 would look like:

Nuetrik [128]

Answer:

Solution in photo

Step-by-step explanation:

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2 years ago