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marissa [1.9K]
3 years ago
14

Simplify each expression 3x+5+7x

Mathematics
2 answers:
Vadim26 [7]3 years ago
7 0

Answer:

10x+5

Step-by-step explanation:

Combine 3x+7x = 10x

5 doesn’t have a variable so u can’t add it with anything so it’s 10x+5

stepan [7]3 years ago
6 0

Answer:

10x+5

Step-by-step explanation:

You would add 3x and 7x

you would leave 5 alone because it has no x thus it can not be added to the 3x and 7x

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How many liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16%
Naily [24]

1.143 liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin.

For given question,

Let x be the quantity ( in liters ) of glycerin added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin,

Thus,

Quantity of glycerin in 12 liters + Quantity of glycerin in x

= Quantity of glycerin in resultant mixture.

⇒ 8% of 12 + 100% of x = 16% of (12 + x )

⇒ 0.08 × 12 + x = 0.16 × ( 12 + x )

⇒ 0.96 + x = 0.16 × 12 + 0.16x

⇒ 0.96 + x = 1.92 + 0.16x

⇒ x - 0.16x = 1.92 - 0.96

⇒ 0.84x = 0.96

⇒ x = 1.143 liters

Therefore, 1.143 liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin.

Learn more about the resulting solution here:

brainly.com/question/12051765

#SPJ4

7 0
2 years ago
What is the value of this expression when x= -6 and y= -1/2? 4(x2+3)-2y
Ostrovityanka [42]

Answer:y=-10

Step-by-step explanation:

y=-1/2 4(6(2)+3)-2y

+2y       6(2)            +2y

3y=-1/2 4(12+3)

multiplie 4 times 12 and 4 times 3

3y=-1/2 48+12

add 48 and 12

3y=-1/2 60

divide -1/2 and 60

3y/3=-30/3

y=-10

3 0
3 years ago
There are 150 children at summer camp. Using the table below, what is the percentage, to the nearest whole percent, of children
lora16 [44]

Answer:

I would say around 41.3% I'm sorry if I am wrong :/

Step-by-step explanation:

62/150 around 0.413

6 0
3 years ago
Solve for b and simplify your answer. 10=2/3 b​
MrMuchimi

Answer:

b=15

Step-by-step explanation:

2/3b=10

3×2/3b=10×3

2b=30

÷2. ÷2

b=15

7 0
3 years ago
Hi:) how to do this?
musickatia [10]

Answer:

a) 127m (3 s.f.)

b) 271m (3 s.f.)

Step-by-step explanation:

Please see the attached pictures for full solution.

Method 1 is written in black and method 2 is written in pink.

4 0
3 years ago
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