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HACTEHA [7]
3 years ago
9

How do I solve 11x - 2 = -13

Mathematics
1 answer:
Nadya [2.5K]3 years ago
3 0
Add 2 to -13 and get -11 so then the problem looks like this. 11x=-11 and divide -11 and 11 and the answer is -1.
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What is 6÷2(2+1)? explain how did you get the answer
denis-greek [22]

Answer:

6 \div 2(2 + 1) \\ 6 \div 2(3) \\ 3 \times 3 \\  = 9

8 0
3 years ago
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Mark spent 135$ on his comic book collection. he just sold it online for 310$. approximately what is the profit as a percent of
V125BC [204]

Answer:

It would be B

Step-by-step explanation:

310-135=175

175/135

7 0
2 years ago
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A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution. How many of each should be used ?
schepotkina [342]

Answer:

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

Step-by-step explanation:

Let us represent:

The number of liters of 25% acid solution = x

The number of liters of 40% acid solution = y

Our system of Equations =

x + y = 240 liters....... Equation 1

x = 240 - y

A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution.

25% × x + 40% × y = 240 liters × 30%

0.25x+ 0.4y = 72...... Equation 2

We substitute 240 - y for x in Equation 2

0.25(240 - y)+ 0.4y = 72

60 - 0.25y + 0.4y = 72

Collect like terms

- 0.25y + 0.4y = 72 - 60

0.15y = 12

y = 12/0.15

y = 80 Liters

Solving for x

x = 240 - y

x = 240 liters - 80 Liters

x = 160 liters

Therefore,

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

5 0
3 years ago
This is 7th grade math, I really need to know this thanks!
Fynjy0 [20]

Answer:

Step-by-step explanation:

30*15%=9/2=4.5

so 4.5 would be travelling outside of New York

this gives 30-4.5=25.5 that are not traveling

5 0
3 years ago
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artcher [175]

Answer:

M= 1/2(x)+7

Step-by-step explanation:

Let M = Martha.

Let X = Number of Lucy's blocks.

Martha has half the amount as Lucy  - 1/2(x)

Then 7 more than that - 1/2 (x) + 7

3 0
2 years ago
Read 2 more answers
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