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zlopas [31]
3 years ago
15

HELP PLEASE WILL MARK BRAINLIEST!!

Mathematics
1 answer:
lilavasa [31]3 years ago
4 0

Answer:

the picture is blurry sorry can't help cause I can't see the question

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Brooke multiplied 3 and 9 and got 17. Brooke knows her answer is wrong because she knows is should be approximately
34kurt

Answer: 3 times 9 is 27

Step-by-step explanation:

8 0
2 years ago
A swimming pool had 2.5 liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it
djyliett [7]
Hi!

If I have done this correctly, then the answer is:

2 million is 80% of 2.5

That means that 20% of the water evaported.
5 0
3 years ago
A number consists of two digits. The number is 2 more than 8 times the sum of the digits, and if 54 is subtracted from the numbe
Gennadij [26K]

Let the units digit = x

Let the 10s digit = y

Equations

10y + x - 2 = 8 * (x + y)              (1)

10y + x - 54 = 10x + y               (2)

Equation 1

10y + x - 2 = 8 * (x + y)    Remove the brackets on the right

10y + x - 2 = 8x + 8y       Subtract 8y from both sides

10y - 8y + x - 2 = 8x        Subtract 8x from both sides

2y + x - 8x - 2 = 0            Combine

2y - 7x - 2 = 0                  (3)

Equation 2

10y + x - 54 = 10x + y      Subtract 10x

10y - 9x - 54 = y              Subtract y from both sides.

9y - 9x - 54 = 0               Divide by 9

y - x - 6 =  0                     Multiply by 2

2y - 2x - 12 = 0                (4)

Solution

Subtract (3) - (4)

2y - 7x - 2 = 0

2y - 2x - 12 = 0

- 5x + 10 = 0      Subtract 10 from both sides.

- 5x = - 10          Divide by - 5

  x = 2

Use (4) to find y

2y - 2x - 12 = 0         Let x =2

2y - 2(2) - 12 = 0      Remove the brackets

2y - 4 - 12 = 0           Combine

2y - 16 = 0                 Add 16 to both sides.

2y = 16                      Divide by 2

y = 8

Answer 82

I'll leave the check to you, but the answer of 82 is correct.


 



4 0
3 years ago
Your school is sponsoring a pancake dinner to raise money for a field trip. You estimate that 150 adults and 280 children will a
soldi70 [24.7K]

Answer:

150x + 280y = 1310

Step-by-step explanation:

5 0
3 years ago
Hey guys I need help, what is 12-(3)+7?
Basile [38]

Answer:

16

Step-by-step explanation:

12 - 3 = 9

9 + 7 = 16

3 0
3 years ago
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