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eduard
4 years ago
8

Craig grades 9 test every 22 minutes if craig has 63 tests to grade how long will it take him?

Mathematics
2 answers:
zavuch27 [327]4 years ago
8 0
Do tests over minutes. 9/22=63/x and cross multiply to solve. 63 times 22 is 1386. Divide that by 9. That equals 154. It took Craig 154 minutes to grade 63 tests. 
aniked [119]4 years ago
5 0
It will take him 110 minutes.
If he grades 9 tests every 22 minutes, this means that 63 tests/ 9 tests = 7 times
This means that he needs to do it 5 times in order to grade all of the tests.
7 X 22 min (amount of time needed to grade 9 tests)
154 min
or 2 hours 34 min

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Help would be nice thank you!
Helen [10]

Answer:

Option B

Step-by-step explanation:

Given equation gives the information about the temperature in Vancouver over a period of 4 hours.

y = -2x + 43

Here 43 represents the initial temperature and (-2) represents the temperature fall in every one hour.

x = duration or time

Therefore, equation states that initial temperature when measured was 43 °F and it is dropping by 2 degrees per hour.

Option B is the answer. 

4 0
3 years ago
Pls help due soon !!!!!!!!!!!!!!!!!!!!!!!!!
enot [183]
Answer: ( B ) 10
Explanation: I hope this helps you with your stuff
7 0
3 years ago
The demand equation for kitchen ovens is given by the equation
alexandr402 [8]

Answer:

The equilibrium point is (3, 3620)

Step-by-step explanation:

We set the supply and the demand equation equal to each other and solve:

-338q+4634=400q^2+20\\400q^2+338q-4614=0

We can solve by factoring:

2(q-3)(200q+769)=0

Setting each factor equal to zero we get:

q=3\text{ or }q=\displaystyle-\frac{769}{200}

Only a positive quantity makes sense, so q=3 is the equilibrium quantity.

To get the equilibrium price we just plug 3 in place of q in any of the functions. Let us use the demand function which is easier to handle:

D(3)=-338(3)+4634=3620

Therefore the equilibrium price is p=3620

In ordered pair form the equilibrium point is (3, 3620)

3 0
4 years ago
M. Jackson spends $500 per month for rent . His new apartment will cost him 10% more than he is paying now . How much is the ren
solniwko [45]
His new apartment will cost him "10% more" than what he is paying currently.

100% = current rent
10% = the extra amount he will pay for his new apartment
100% + 10% = new rent

100% + 10% = 110%

Now convert the percent into a decimal by moving the % sign two places to the left and make the % sign into a decimal point.

110% = 1.10

500 * 1.10 = 550

So, he will pay a rent of $550 for his new apartment.
3 0
4 years ago
Natalie walked 35 mile in 12 hour. How fast did she walk, in miles per hour?
timofeeve [1]

Answer:

almost 3 mph so I'm guessing (d) is the answer

Step-by-step explanation:

35  ÷ 12 = 2.9 miles per hour

5 0
3 years ago
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