How do I solve 10x-3(7-2x)+18

Mathematics

2 answers:

kiruha [24]3 years ago

8 0

10x-(3x7-3x2x)+18
10x-(21-3x2x)+18
10x-(21-6x)+18
10x-21+6x+18
16x-21+18
16x-3

ra1l [238]3 years ago

8 0

First, we need to reduce the equation. To do this, we need to get rid of the parentheses. I'll start with that.

Remember that subtracting 10X-3 is the same as adding a negative number. 10X+(-3) Thus, we change the equation.

10X+(-3)(7-2X)+18

Now we multiply -3 and 7-2X. We must distribute because of the parentheses around 7-2X.

10X+[(-3)(7)+(-3)(-2X)]+18

10X+(-21)+(6X)+18

Now, we add like terms.

10X+6X+(-21)+18

16X+(-3)

16X-3

Now, if you only needed to reduce the equation, then you can stop here.

However, if the equation is equal to zero, and you need to solve for X, then you need to add 3 to both sides so that X is by itself.

16X-3+3=0+3

16X=3

Now decide both signs by 16 to solve for X.

16X/16=3/16

X=3/16

X=0.1875

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3 0

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inysia [295]

Answer:

Neighborhood Q appears to have a bigger family size

Step-by-step explanation:

Mean = the sum of all data values divided by the total number of data values

Number of families in Neighborhood Q = 9

Mean family size of Neighborhood Q:

= (2 + 5 + 4 + 3 + 2 + 5 + 3 + 6 + 5) ÷ 9

= 35 ÷ 9

= 3.888888...

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Mean family size of Neighborhood S:

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= 27 ÷ 9

= 3

The mean family size of Neighborhood Q is 3.88.. and the mean family size of Neighborhood S is 3. Therefore, Neighborhood Q appears to have a bigger family size as it's average family size is bigger than that of Neighborhood S.

6 0

2 years ago

You deposit $5000 in an account earning 8% interest compounded monthly. How much will you have in the account in 15 years?

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