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timama [110]
3 years ago
13

With the equation 2/10=4/a-3 what does a equal?

Mathematics
1 answer:
shusha [124]3 years ago
5 0

Answer:

23

Step-by-step explanation:

Since 2/10 = 4/20, we know that a-3 = 20, so a = 20 + 3 = 23.

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Simplify expression -6x^2+4-x^2+15x
zloy xaker [14]

Combine like terms

-6x² + (-x²) = -6x² - x² = -7x²

-7x² + 15x + 4 is your answer

hope this helps

4 0
3 years ago
A $950 notebook computer is discounted 15%. What is the sale price of the notebook computer?
Amanda [17]

Answer:

$807.5

Step-by-step explanation:

If the cost of the notebook is 15% off, the new total price is 85% of the original. Then:

(85%) x ($950) = $807.5

4 0
3 years ago
A public relations firm found that only 27% of voters in a certain state are satisfied with their U.S. senators. How large a sam
OLga [1]

Answer:

a) 38

Step-by-step explanation:

The normal distribution can be applied if:

np \geq 5 and n(1-p) \geq 5

In this question:

p = 0.27

Then

a) 38

n = 38.

Then

38*0.27 = 10.26

38*0.73 = 27.74

Satisfies. But is this the smallest sample of the options which satisfies.

b) 14

n = 14

Then

14*0.23 = 3.22

14*0.77 = 10.78

Does not satisfy

c) 10

Smaller than 14, which also does not satisfy, so 10 does not satisfy.

d) 48

Greater than 38, which already satisfies. So the answer is a)

8 0
4 years ago
How to divide 48 by 5/8
snow_lady [41]
Use the KCF method, or keep, change, flip.

1 ) Set up your expression: 48 / 5/8
2 ) Change the division symbol into multiplication : 48 x 5/8
3 ) Flip 5/8 : 48 x 8/5
4 ) Solve! If it helps,write 48 as 48/1. Just multiply as you would.

Answer: 384/5, or 76 4/5
4 0
3 years ago
A questionnaire is being designed to determine whether most people are or are not in favor of keeping U.S. troops in Iraq. Give
uranmaximum [27]

Here are the two examples of poorly worded questions that are biased toward each response:

<span>1.       </span>It’s certain that keeping U.S. troops in Iraq is a good decision; we should send more troops there, right?

<span>2.       </span><span>Since keeping U.S. troops should not be kept in Iraq when do you think is the best time to evacuate them?</span>

3 0
4 years ago
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