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Airida [17]
3 years ago
5

Evaluate 7x – y if x = 9 and y = 3

Mathematics
1 answer:
Mila [183]3 years ago
5 0
7x-y

7(9)-(3)

63-3

The answer is 3
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9/4 plus 3/8 (please show work)
Elodia [21]

Answer:

21/8 or 2 5/8

Step-by-step explanation:

9/4 + 3/8

The least common denominator being 8 so you would add the numerators.

18+3/8

Which would be:

21/8 or, as a mixed fraction, 2 5/8

5 0
3 years ago
A company with a fleet of 150 cars found that the emissions systems of only 4 out of the 32 they tested failed to meet pollution
lidiya [134]

Answer:

Yes

Step-by-step explanation:

First, we need to find how many cars out of the entire fleet fail the test

4/32 = x/150

Cross multiply to find x

32x = 150(4)

32x = 600

32x/32 = 600/32

x = 18.75

I'll round it to 19. So 19 out of 150 cars fail the test. Find the percentage of this and compare it to the 30% estimate

19 /150 = 0.127

0.127(100) = 12.7%

12.7% is obviously lower than 30% so yes it is strong evidence the percentage of the fleet out of compliance is different from their initial thought

8 0
4 years ago
Which equation represents the model shown
Alex787 [66]

Answer:

The answer is A.

Step-by-step explanation:

This is quite the odd question to see on homework, but looking at it a certain way helps determine the answer. two fourths are shaded in, and so is one twelfth. Since the other five twelfths are blank, it can be interpreted that the model is showing us A. This can be checked on a scientific calculator.

.5 / (1/12) = 6

Therefore, A is correct.

7 0
3 years ago
How do I show exponents when writing a problem out here
Brums [2.3K]

Answer:

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2. you can also use the symbols option and there is shows little numbers but only gives you the option for the power of 2 and 3

example: 6³

3. click equation option and put the x^2 and then delete the x and put the number or variable and then within the brackets put what the power should be.

Step-by-step explanation:

3 0
3 years ago
The diameter of a circle is 16 inches find it’s circumference
Leona [35]

Answer:

c = 50.27in

Step-by-step explanation:

5 0
3 years ago
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