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Mashcka [7]
3 years ago
11

3a+8b-5c 6a- 9b+4c -7a+b+2chow do I solve this by solving using addition operation

Mathematics
1 answer:
jeyben [28]3 years ago
3 0

Answer: 2a+c


Step-by-step explanation: You add all variables that are positive then you subtract by negatives or vice versa. Add 3a+6a-7a yes subtract the 7a which gets you 2a. Add 8b+b-9b, you get 9b-9b which is 0 so you don’t need b in the problem anymore. -5a+4c+2c then you get c, because it is 1 c. So your answer is 2a+c. :P Hope this helped.


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George weighs 60 pounds less than his older brother. Together they weigh 240 pounds. How many pounds does George weigh?
lyudmila [28]

Easy Algebra question!

Let's use "x" as a variable.

The equation would be x+x+60 = 240 with "x" being George's weight.

Subtract 60 from both sides and you get 2x = 180.

From there you divide both sides by 2, getting x=90.

"x" is George's weight, so he weighs 90 pounds.

ANSWER: 90 POUNDS

7 0
3 years ago
Please i need help for all of them!!​
lianna [129]

Answer:

1) x=65

2) x= 70

3) x= 40

4) x= 131

5) x= 75

6) x= 49

7) x= -12

8) x= 42

3 0
3 years ago
During a promotional event a sporting good store gave a free t-shirt every eighth customer and a free water bottle every 10th cu
liq [111]

Answer:

40th customer

Step-by-step explanation:

Given that there is a promotional event

A sporting good store gave t shirt and free water bottle.

T shirt was given to 8th customer and water bottle to every 10th customer.

For the first person who should get both, he should have number as least common multiple of 8 and 10

8 = 2x2x2

10 = 2x5

Hence least common denominator = 2x2x2x5 = 40

Thus 40th customer will be the first to get both.


5 0
3 years ago
What is the slope-intercept equation of the line below ?
son4ous [18]

Answer:

y = -5/4x + 3

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
25x^2+20x+4=0 solve by factoring pls show work (50points)
Inessa [10]
X= -2/5

SOLUTION
25x^2 + 20x + 4 = 0
(5x + 2)^2 = 0
5x + 2 = 0
x= -2/5

Hope this helps! :))
6 0
2 years ago
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