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larisa86 [58]
3 years ago
12

Solve: 7x - 2y = -3 14x + y = 14

Mathematics
2 answers:
kumpel [21]3 years ago
7 0


1) rearrange one of the formulas so one of the variables is by itself
2) in the other equation replace the variable you solved for with the rearranged equation
3) distribute the 2
4) distrubute the negative
5) combine like terms
6-7) begin to solve for x
8) plug in the value solved for x in the other equation
9-11) solve for y
Final Answers:
x=5/7 y=4

nikdorinn [45]3 years ago
5 0

Answer: 5/7+x 4=y


Step-by-step explanation:


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3 percent of 420 is what ?
Alenkasestr [34]
Hi there! The answer is 12.6


First we need to change the percentage into a decimal. To convert this percentage, we have to divide it by 100.

3\% = 0.03


Hence, to find 3 percent of 420, we must multiply 420 by 0.03. We get the following:

3\% \times 420 = 0.03 \times 420 = 12.6

~ Hope this helps you!
5 0
3 years ago
Read 2 more answers
Mya had 12 assignments to complete by Friday of this week. So far, she completed 75% percent of her assignments this week. How m
lesya692 [45]

Answer:

3 assignments incomplete.

Step-by-step explanation:

context: 75% can be rewritten as 0.75

12 × 0.75 = 9 assignments completed.

The above equation shows the amount of assignments that have been already completed. In order to find out how many assignments she has yet to have completed, we need to subtract these amounts.

12 - 9 = 3 assignments incomplete.

5 0
3 years ago
What is the perimeter of ABC to the nearest whole number?
kogti [31]

Answer:B

Step-by-step explanation: closes to caclation

8 0
3 years ago
T(n) = 35 - 25n<br> please help :(
Lunna [17]

Answer:       t= 35/n  -25

                       n=35/t+25

Step-by-step explanation:

4 0
4 years ago
Tanya bought three adult tickets and one children's ticket to a movie for 24.60 Li bought five adult tickets and four children's
Arte-miy333 [17]

Answer:

adult tickets  6.9

children tickets  3.9

Step-by-step explanation:

3x + y = 24.60    L1

5x + 4y = 50.10  L2

5L1 - 3L2

15x +  5y = 123

-15x - 12y = -150.3

-7y = -27,3

y = -27,3/-7

y = 3.9

3x + y = 24.60

3x + 3.9 = 24.60

3x = 24.60 - 3.9

3x = 20.7

x = 20.7 / 3

x = 6.9

3 0
3 years ago
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