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scoundrel [369]
3 years ago
7

Which of the following equations represents the total cost, C, for the number of sandwiches, S, where each sandwich costs $7?

Mathematics
2 answers:
vagabundo [1.1K]3 years ago
7 0
I’m thinking a because your not dividing
Greeley [361]3 years ago
3 0
Total cost is C

No of sandwiches is S

Each S costs $7

So equation is number 2 (C = 7S)

Hope this helps
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(no links please and than you! :))
pashok25 [27]

Answer:

Line D represents a proportional relationship.

Step-by-step explanation:

In an easy way to explain what a proportional relationship is, it is basically a line graph that passes through the origin point. When a line graph passes through the origin point (0,0), it is proportional.

Other graphs do not intersect the origin points so they are not proportional.

6 0
3 years ago
Read 2 more answers
Solve the system of linear equations Y+2.3=0.45x -2y=4.2-7.8
Zina [86]
Solve the following system using substitution:
{y + 2.3 = 0.45 x
{-2 y = -3.6

In the second equation, look to solve for y:
{y + 2.3 = 0.45 x
{-2 y = -3.6

-3.6 = -18/5:
-2 y = -18/5

Divide both sides by -2:
{y + 2.3 = 0.45 x
{y = 9/5

Substitute y = 9/5 into the first equation:
{4.1 = 0.45 x
{y = 9/5

In the first equation, look to solve for x:
{4.1 = 0.45 x
{y = 9/5

4.1 = 41/10 and 0.45 x = (9 x)/20:
41/10 = (9 x)/20

41/10 = (9 x)/20 is equivalent to (9 x)/20 = 41/10:
{(9 x)/20 = 41/10
{y = 9/5
Multiply both sides by 20/9:
Answer:  {x = 82/9
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3 0
3 years ago
Read 2 more answers
10 points
enyata [817]

Answer:

$175.45

Step-by-step explanation:

8.25 / 0.75 = 11

15.95 x 11 = 175.45

4 0
2 years ago
Use the subway train schedule below to answer the question.
Aliun [14]

Answer:

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Step-by-step explanation:

The least common multiple of 8 minutes and 10 minutes is ...

  LCM(8, 10) = 8·10/GCD(8, 10) = 80/2 = 40

The red and blue trains will arrive together again in 40 minutes.

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3 years ago
Answer the question<br> 10 points
lubasha [3.4K]
The slope is 9 and the y intercept is 4.
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3 years ago
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