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NARA [144]
3 years ago
5

I need help with math!!! time is running out!!! will mark brainliest!!!

Mathematics
1 answer:
taurus [48]3 years ago
4 0
1.

Answers A. and B.

2.

Answer C.

3.

Answer A.

4.

Answer B.

5.

Answer D.

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ASAP pleASEEEE you would be helping a girl out
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Step-by-step explanation:

ASAP pleASEEEE you would be helping a girl out

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2 years ago
The formula for the surface area of a right rectangular prism is A  2lw  2hw  2lh, where l, w, and h represent the length, wi
Thepotemich [5.8K]

Answer:

The term 2lw is independent of the height

Step-by-step explanation:

This formula is usually obtained reasoning like this: the rectangular prism has 6 faces, thus the surface area is the sum of the areas of these faces.

2 faces are l×w rectangles, so their area is lw+lw=2lw. Note that we are not using the height to compute the area, then this is the independent term.

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3 years ago
A 40% antifreeze solution is to be mixed with a 70% antifreeze
Alenkasestr [34]

Answer: 160 liters of the

40% solution and 80 liters of the 70% solution will be used.

Step-by-step explanation:

Let x represent the number of liters of 40% antifreeze solution that should be used.

Let y represent the number of liters of 70% antifreeze solution that should be used.

The volume of the mixture to be mixed is 240 liters. It means that

x + y = 240

The 40% antifreeze solution is to be mixed with a 70% antifreeze

solution to get 240 liters of a 50% solution. This means that

0.4x + 0.7y = 0.5(240)

0.4x + 0.7y = 120 - - - - - - - - - - - -1

Substituting x = 240 - y into equation 1, it becomes

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96 - 0.4y + 0.7y = 120

- 0.4y + 0.7y = 120 - 96

0.3y = 24

y = 24/0.3

y = 80

x = 240 - y = 240 - 80

x = 160

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3 years ago
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2 years ago
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