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Temka [501]
3 years ago
11

Solve 5x – 1 = 3x – 15. Explain each step, and include the Properties of Equality that you used.

Mathematics
1 answer:
artcher [175]3 years ago
7 0

5x – 1 = 3x – 15

Subtraction Property of Equality  (Subtract 3x from both sides)

2x - 1 = -15

Addition Property of Equality   (Add 1 to both sides)

2x = - 14

Division Property of Equality   (Divide both sides by 2)

x = -7

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Find x and round it to the nearest tenth is necessary, help please and thank you so much
Blizzard [7]

Answer:

111

Step-by-step explanation:

360 - 65 - 106 - 78 = 111

4 0
3 years ago
If f(x) = 3x - 12, what is f(2)?<br> -6<br> -18<br> 18<br> 6
dusya [7]

Answer: -6

Explanation: In this problem, we're given the function f(x) = 3x - 12 and we're asked to find f(2).

To find f(2) or the value of the function when <em>x </em>equals 0, we simply substitute 2 in for <em>x</em> in our function. So we have f(x) = 3(2) - 12 or 6 - 12 which equals -6.

So f(2) or the value of the function when <em>x </em>equals 2 is -6.

4 0
3 years ago
Read 2 more answers
The price of some houses in a neighborhood are shown below: House Price A $120,000 B $130,000 C $140,000 D $150,000 E $1,110,000
LenaWriter [7]

Answer:

To infer a price for the houses in that neighborhood, it is better to use the median.

Step-by-step explanation:

We have the following prices:

$ 120,000

$ 130,000

$ 140,000

$ 150,000

$ 1,110,000

Now, if we do it for the median, it is the best option, because there is a very distant value and the median is not much affected. The value that is inferred through the average is $ 140,000, a value close to the first 4 houses.

If we do it by the mean, the value would be:

(120,000 + 130,000 + 140,000 + 150,000 + 1,110,000) / 5 = $ 330000

a value very far from all the prices of the houses, this is due to the value so far from the last house.

In other words, to infer a price for the houses in that neighborhood, it is better to use the median.

4 0
4 years ago
The sum<br> of two numbers is 72. The difference is<br> 22. Find the two numbers.
kotegsom [21]

Answer:

b= 25

Step-by-step explanation:

a+b =72

a-b = 22

2a = 94

DBS(Divide Both Side) by 2

a = 47

=47 +b =72

and:

47 -b =22

subtract 47 from both sides:

b=25

and

-b = -25 MBS(Multiply Both Side) by-1 ....>b=25

5 0
3 years ago
Study the equation.<br> y = x2 - 4x - 77<br> Write the equation in graphing form (vertex form).
Julli [10]

Answer:

y=(x-2)^2-81

Step-by-step explanation:

4 0
3 years ago
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