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Digiron [165]
3 years ago
5

Tomas bought 3 software apps and 2 e-books for a total of $21. The two e-books cost $12. If s represents the cost of each app, t

he total cost of all 5 items is represented by mc021-1.jpg. Which statement about verifying the solution for s is true?
Mathematics
2 answers:
ser-zykov [4K]3 years ago
9 0
The soulation is given by s=3 because it makes the value of 3s+12 equal to 21 
vagabundo [1.1K]3 years ago
7 0

Answer:

s=3

Step-by-step explanation:

You might be interested in
17x - 6 + 3x - 5 = x + 11 + 4x
notka56 [123]

Answer:

x = 22/15

Step-by-step explanation:

17x - 6 + 3x - 5 = x + 11 + 4x

Combine like terms on each side.

20x - 11 = 5x + 11

Add 11 to both sides. Subtract 5x from both sides.

15x = 22

Divide both sides by 15.

x = 22/15

4 0
3 years ago
Read 2 more answers
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
adell [148]

Answer:

option D

2x − 7(−3x − 17) = 4

Step-by-step explanation:

Given in the question two equations

<h3>Equation 1</h3>

2x - 7y = 4

<h3>Equation 2</h3>

3x + y = -17

Rearranging equation 2 in terms of y

3x + y = -17

y = -17 - 3x

Put this value of y in Equation 1

2x - 7y = 4

2x - 7(-17 - 3x) = 4

So,

If you use the substitution method to solve the following system, new equation will be

<h3>2x - 7(- 3x - 17) = 4 </h3>

3 0
3 years ago
Solve the system using the substituion method<br> -4x+y=8<br> x-3y=9
lions [1.4K]
Hi there!

x - 3y = 9
x = 9 + 3y
 
-4x + y = 8
-4(9+3y) + y = 8
-36 - 12y + y = 8
-36 - 11y = 8
-11y = 44
-y = 4
y = -4

x - 3y = 9
x - 3(-4) = 9
x + 12 = 9
x = 21

So, your answers are y = -4 and x = 21.

Hope this helps!
3 0
3 years ago
At Best Buy they have a stereo system that sells for $2200 and is on sale for 15% and sales tax is 7% what is the final cost
vlada-n [284]

The sales price is 85% of the original $2,200, which can be calculated as follows: .85(2,200) = 1870 Assuming you meant 15% discount price..

Now we need to find a 7% sales tax, which can be calculated as follows:

.07(1870) = 130.90

Now we add the sale price and the sales tax: 1870 + 130,90 = $2000.90 for the total cost.

6 0
2 years ago
Estimate 726 times 5
Rom4ik [11]

700 times 5 = 3500 or 726 times 5 estimated =4000 hope this helps

6 0
3 years ago
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