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Sauron [17]
4 years ago
7

3 + x - 7x = -15 + 3x

Mathematics
1 answer:
asambeis [7]4 years ago
6 0
X=2
To check it you plug in 2 for x. Which then gives you:

3+(2-14)=-15+6 which then gives you:
3+-12=-15+6 which the gives you:
-9=-9

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A family has two cars. The first car has a fuel efficiency of 35 miles per gallon of gas and the second has a fuel efficiency of
cestrela7 [59]

The amount of gas consumed by first and second car were 20 gallons and 15 gallons respectively.

<em><u>Explanation</u></em>

Suppose,  x gallons of gas were consumed by the first car.

As the total gas consumption in one week is 35 gallons, so the amount of gas consumed by second car will be:  (35-x) gallons.

The first car has a fuel efficiency of 35 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas.

So, the <u>distance traveled by the first car</u> in x gallons of gas =35x miles and the <u>distance traveled by the second car</u> in (35-x) gallons of gas =15(35-x) miles.

Given that, the two cars went a <u>combined total of 925 miles</u>. So, the equation will be.....

35x+15(35-x)=925\\ \\ 35x+525-15x=925\\ \\ 20x=925-525=400\\ \\ x=\frac{400}{20}=20

So, the amount of gas consumed by the first car is 20 gallons and the amount of gas consumed by the second car is: (35 - 20) = 15 gallons.

3 0
4 years ago
what are the missing variables?
Julli [10]

Answer:Missing data (or missing values) is defined as the data value that is not stored for a variable in the observation of interest. The problem of missing data is relatively common in almost all research and can have a significant effect on the conclusions that can be drawn from the data [1].

4 0
3 years ago
Read 2 more answers
If f(x) = 6x-4 what is the value of f(8)
Vinvika [58]

Answer:

f(8) = 44

Step-by-step explanation:

f(x) = 6x-4

Let x = 8

f(8) = 6(8) - 4

Multiply

     = 48 -4

    = 44

8 0
3 years ago
Read 2 more answers
Help help math math math
adelina 88 [10]

Answer:

113

Step-by-step explanation:

The supplement of angle 3 is congruent to 67, because they are corresponding angles. After you subtract the supplement from 180, you should get angle 3

180-67=113

8 0
3 years ago
Read 2 more answers
In the 1990s, Brazil had a deforestation rate of about 0.48% per year.1 (This is the rate at which land covered by forests is sh
CaHeK987 [17]

Answer:

the answer is 1.453

Step-by-step explanation:

i am not sure about the answer but here are my steps. first he says in the 1990s  there was a deforestation rate of about 0.48%per year. and 1 is the rate of land that is shrinking. this means that if Brazil had a forest of area x then

x(0.48%)=1 therefore x=2.083

lets use that in this equation

the area left (the final answer) 2.083(0.48)^35= 1.453

(i asked about the unit its measured with because if it is measured by thousands of squared meters or kilometers just big unit measured to be exact my answer would be correct)

5 0
3 years ago
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