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3 years ago

Y=-3x+12 Y=-3

1 answer:

4 0

Well first you substitute -3 for y and then subtract 12 from both sides of the equation and it should look like -15=-3x. Then divide 3 on both sides and you should end up getting 5=x.

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7 x e x f x 8 please can someone explain

ira [324]

Always do the numbers first before dealing with the letters. We move the numbers to one side, and the letters to the other. (7 x 8) x e x f -> I have enclosed the numbers in brackets in order to separate them so that it is clearer. (56) x e x f -> So when we multiply letters, they unite = ef; another example would be: a x b = abTherefore the answer is = 56ef HOPE THIS HELPED

4 0

3 years ago

A university professor asked his class of 42 students when they had studied for his class the previous weekend. There responses

Basile [38]

ANSWERS:

a) 16 students

b) 25 students

c) 2 students

STEP BY STEP:

There are 42 students in total. This question can be solved by "Principal of Inclusion and Exclusion"

Question a)

The students that studied on Sunday in total with overlaps is 30. To figure out the students that ONLY studied on Sunday you need to first minus the overlaps in the combos:

the combos:

3, 10, 6, 2

Since the last combo included all of the other dates, we need to minus it:

1, 8, 4, 2

Now we can use the total of Sunday and minus the combos that includes Sunday:

30 - (4 + 2 + 8) = 16 students

Question b)

To figure out all the students that only studied on ONE day, not 2 not 3, just one day. We need to figure out the students that studied for Saturday and Friday using the same method before for figuring out Sunday:

Friday: 9 - 4 - 1 -2 = 2 students

Saturday: 18 - 1 - 2- 8 = 7 students

and now add them all together: 2 + 7 + 16 = 25 students

That is the total number of students that studied on one day.

Question c)

Now for the numbers of students that didn't study... We can just use the total to minus everything else!

42 - (25 + 1 + 4 + 8 + 2) = 2 students!!!

And thats all done! If you still don't get it, please ask!

7 0

3 years ago

Iris is making hats for the members of the school marching band. She can make 3 hats in 1 1/2 hours. She wants to know how many

likoan [24]

She makes 3 hats per 1 and 1/2 hours. Therefore she makes $\frac{3}{\frac{3}{2}}$ hats per hour. This fraction simplified is 2 hats per hour. This is the solution.

2 hats per hour.

7 0

3 years ago

Is (5.7) a solution for the following system of equations? y=2x-3 y=x+2

alukav5142 [94]

Answer: yes y=2x-3, y=x+2 : y=7, x=5

4 0

2 years ago

Babysitting for 8 hrs and making $72.00 or babysitting for 6 hrs and making $57.00. Which is the better deal?

Sedaia [141]

Babysitting for 8 hours and making $72.00 because of a better/greater amount of money

5 0

3 years ago

Read 2 more answers