1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alinara [238K]
2 years ago
13

(3a) You spend $72 on tapes and CDs. Each tape costs $8 and each CD costs $12.

Mathematics
1 answer:
Makovka662 [10]2 years ago
6 0

Answer:

3a. 8t + 12c = 72

3b. t + c = 7

Step-by-step explanation:

number of tapes is t

number of Cds is c

so 8t + 12c = 72

and t + c = 7

so t = 7 - c

replace t = 7 - c in to the first equation

8(7 - c) + 12c = 72

56 - 8c + 12c = 72

4c = 72 - 56 = 16

c = 4

if c = 4, then t = 7 - c = 7 - 4 = 3

You might be interested in
My grade is a 77%, if i get a 0% on a paper worth 30% of my grade, what will my grade be now??
blsea [12.9K]
Grade=Paper+Other
Grade=(Grade_{paper}\times Value_{paper})+(Grade_{other}\times Value_{other})
Grade=(0 \times 30\%)+(77\% \times (1-30\%))
Grade=(0 \times 30\%)+(77\% \times 70\%)
Grade=0+53.9\%
Grade=53.9\%
6 0
3 years ago
According to the census data, in 2014 about 126 million adults in the United States were women, which is about 51.4% of the tota
jeka57 [31]

Answer:

245.1361868

Step-by-step explanation:

126               51.4

___    =        ____             126x100=12600      12600/51.4=245.1361868

 x                  100

6 0
3 years ago
Match the gig ratio with the approximate decimal number Round to nearest 10
adell [148]

Answer:

sin 30 sin 30 sin 30 sin 30

5 0
2 years ago
Natalie's aunt gave her $47 to spend on clothes at the mall. She bought 4 shirts that cost $4 each and a pair of pants that cost
Murljashka [212]

Answer:$18

Step-by-step explanation:4 * 4 = $16. One pair of pants = $13. 16 + 13 = $29. 47 - 29 = $18

5 0
3 years ago
The current on the Mississippi River is a constant 4 miles per hour. A paddleboat travels 48 miles upstream in the same amount o
Dmitriy789 [7]
Upstream-44
Downstream-68
I think
8 0
3 years ago
Read 2 more answers
Other questions:
  • Scores on a dental anxiety scale range from 0​ (no anxiety) to 20​ (extreme anxiety). The scores are normally distributed with a
    14·1 answer
  • 15 points!!!:
    14·1 answer
  • Solve for r. - 17 +r = 42
    5·2 answers
  • Yo I’m timed so real quick what is the value of (-1/2) to the -4th power.
    15·2 answers
  • Solve the following equation for x to find the total number of people who became members of a social networking site for a certa
    13·2 answers
  • At 8:00 the temperature was 6 degrees celsius (*
    6·1 answer
  • Jimmy worked 6.75 hours at $8.75 per hour. What does Jimmy earn?
    14·1 answer
  • Round to the nearest thousands 609​
    5·2 answers
  • E<br> Homework: 1-7 HW<br> Simplify the expression.<br> 8(5+t) - 2(t+1)<br> 8(5 + t) - 2(t+1)=
    15·1 answer
  • Sceenshot please answer it math problem
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!