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tigry1 [53]
3 years ago
12

Jimmy spent 45 minutes to finish his homework. There are 20 problems. What is the average amount of time he spends to finish eac

h problem
Mathematics
1 answer:
nexus9112 [7]3 years ago
6 0
The average is (time)/(number of problems)=(45/60)/20=(3/4)/20=3/80  hours per problem. In minutes, the answer would be 3/80*60=9/4 minutes per problem.
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Natasha2012 [34]
144 million chocolate bars made in 9 days :)
6 0
2 years ago
Please explain someone!!!
77julia77 [94]

Answer: 1 and 2

Step-by-step explanation: 1 and 2 because if you are graphing this the formula to find the slope / the line is y = x + some number. In the formula x is how much the line goes from the x axis and the number is how much it is from the y axis. On #2 the problem is 3y = 2x + 4 so to follow the formula you need to divide both sides by 3 to get y = 2/3x + 4. For #3 you do the same thing to get y = -3/2x -5. Finally for #1 the equation is 2x + 3y = 7 so to get the slope / line you need to put x on the other side so now it is 3y = 7-2x then you divide both sides by 3 and get y = -2/3x + 7 and on 1 and 2 there x is 2/3 (the negative doesn't matter and the random number) so they are parallel.

5 0
2 years ago
The sum of two numbers is 2. Their difference is -16. What is the first number?
Helen [10]

Answer: The first number is 4

Explanation: Since the sum of the two numbers is ten, x + y = 10

Also, since the difference of the two numbers is two, then x - y = 2

Since x - y = 2, another way to write that is x = y + 2 and since x is exactly the same as y + 2, we can plug in "y + 2" in place of x in the first equation (x + y = 10) to get (y + 2) + y = 10. Then we solve this equation by combining like-terms.

2y + 2 = 10

2y = 8

y = 4

Since x = y + 2, x = 4 + 2 or x = 6

I hope this helped you!

7 0
2 years ago
Read 2 more answers
Plz look at pic !!!! Plz Help!!! <br> Use proportion to solve
soldi70 [24.7K]

Answer:

It takes 26 2/3 gallons to make a 400 mile trip.

Step-by-step explanation:

This question is simply asking for the number of miles per gallon . In math, <em>per</em> means this is meant to be written as a fraction.

"If a trip of 270 miles required 18 gallons of gas" is actually saying "270 miles per 18 gallons." This can be written as a fraction like so: 270/18.

If we're looking for the amount of gas used for a 400 mile trip, we have the fraction: 400/g, g being the amount of gallons it took to make that trip.

Now we can set up the proportion: \frac{270}{18} =\frac{400}{g}

Cross multiply and solve accordingly.

\frac{270}{18} =\frac{400}{g}

400270g = 400 *18\\ 270g = 7200\\g=26\frac{2}{3}/g

So the answer is:

It takes 26 2/3 gallons to make a 400 mile trip.

6 0
3 years ago
Write a fraction you could multiply by the number 4 and have a product less than 4.
swat32
I think 1/4 is a good answer?
\frac{1}{4}  \times 4 = 1
and
\frac{1}{4}   \times  \frac{1}{4}  =  \frac{1}{16}
7 0
3 years ago
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