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igomit [66]
3 years ago
15

Select the correct answer.

Mathematics
2 answers:
Likurg_2 [28]3 years ago
5 0

Answer:The answer is C

Step-by-step explanation:

When you plug it in 7*2 is 14+ 5*3 is 15 you add 14+15 you get 29 and then for the other equation you do 12-5 which gives you the x value of 7. Hope this helps.

Rudik [331]3 years ago
4 0
The answer is C hope this helps..let me know
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 is the difference between a positive like fraction and a negative like fraction always, sometimes, or never positive?
Inga [223]

Answer:

Step-by-step explanation:

7 0
3 years ago
What is 2/5x-4=8-3/5x
lesya692 [45]

Answer:

x = 12

Step-by-step explanation:

Solve for x:

(2 x)/5 - 4 = 8 - (3 x)/5

Put each term in (2 x)/5 - 4 over the common denominator 5: (2 x)/5 - 4 = (2 x)/5 - 20/5:

(2 x)/5 - 20/5 = 8 - (3 x)/5

(2 x)/5 - 20/5 = (2 x - 20)/5:

(2 x - 20)/5 = 8 - (3 x)/5

Put each term in 8 - (3 x)/5 over the common denominator 5: 8 - (3 x)/5 = 40/5 - (3 x)/5:

(2 x - 20)/5 = 40/5 - (3 x)/5

40/5 - (3 x)/5 = (40 - 3 x)/5:

(2 x - 20)/5 = (40 - 3 x)/5

Multiply both sides by 5:

2 x - 20 = 40 - 3 x

Add 3 x to both sides:

3 x + 2 x - 20 = (3 x - 3 x) + 40

3 x - 3 x = 0:

3 x + 2 x - 20 = 40

2 x + 3 x = 5 x:

5 x - 20 = 40

Add 20 to both sides:

5 x + (20 - 20) = 20 + 40

20 - 20 = 0:

5 x = 40 + 20

40 + 20 = 60:

5 x = 60

Divide both sides of 5 x = 60 by 5:

(5 x)/5 = 60/5

5/5 = 1:

x = 60/5

The gcd of 60 and 5 is 5, so 60/5 = (5×12)/(5×1) = 5/5×12 = 12:

Answer:  x = 12

6 0
3 years ago
what is the percentage of change for the cost of cheeseburger if in the year of 2000 it was $5.00 and in 2015 is $6.50.​
snow_lady [41]

Answer:

$2.50

2015: $2.00

2000: $7.50

2000: $5.00

2000: $2.00

2015: $9.00

2015: $6.50

2015: $4.50

2010

1. what is the percent of change in the cost of a pizza? _ a

x 150

100 1.50 p1500 750 1155oo.

150 isg

pi

2. what is the percent of change in the cost of a cheeseburger?

175

6.50

1.50

Step-by-step explanation:

4 0
3 years ago
A certain number is added to 9 the result is 5 - the same number what is the number​
attashe74 [19]

Answer:

the answer to the question is -2

Step-by-step explanation:

a certain number=x

therefore,x+9=5-x

x+x=5-9

2x= -4

you the divide both sides by2 to gain x

8 0
3 years ago
2(x+3)=2x+6 name the property
maria [59]
Distributive property. You distribute the 2 to the X and get 2x, then distribute the 2 and the 3. 2X3=6. This gets you 2x+6.
8 0
4 years ago
Read 2 more answers
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