Answer:
they got -21 when they were supposted to get +21
and they also got +6x when they were supposted to get -6x
Step-by-step explanation:
that's because -3 and 2x are multiplied together and when you are multiplying negative and positive number you need to get negative result.
when you are multiplying negative with negative number, you will get positive number.
Answer Choice B
Step-by-step explanation:
Answer:
26
Step-by-step explanation:
h represents highschool members
m represents middle school members
42 = h+m
h = 2m-6
Substitute h for 2m-6 in first equation:
42 = (2m-6)+m
Solve for m:
42 =3m-6
48 = 3m
m = 16
Subsitute 16 for m in second equation:
h = 2(16)-6
Solve for h:
h = 32-6
h = 26
Answer:
exact form: 69/8
mixed number form: 8 5/8
Step-by-step explanation:
^
1/4 ÷ 2/5 = 5/8 |
5/8+8 = ______|
Put the ratios into fraction form. Since you do not know how many problems, replace it with an unknown number a.k.a. a variable.
10/30 = x/60
Since you can get 30 to 60 by multiplying by 2, multiply everything on the left side by 2.
Then, you get 20/60, which means 20 = x. So, he can complete 20 minutes an hour.
