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klemol [59]
3 years ago
13

If you can multiply a number by 3 and then subtract 5,you will get 40.What is the number?

Mathematics
2 answers:
Tema [17]3 years ago
7 0

Let "a number" = x

3x - 5 = 40 is the equation you will use.

Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, add 5 to both sides

3x - 5 (+5) = 40 (+5)

3x = 40 + 5

3x = 45

Next, to isolate the x, divide 3 from both sides

(3x)/3 = (45)/3

x = 45/3

x = 15

15 is your answer

~

mylen [45]3 years ago
6 0

The number is 15.

40+5 = 45

45/3 = 15


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Answer:

The  equation for a line that is parallel to y + 5 = 3(x - 1) and goes through the point (3,-4) will be:

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Step-by-step explanation:

Given the equation

y + 5 = 3(x - 1)

Writing in the slope-intercept form

y=mx+b

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y = 3(x-1) -5

y  = 3x-3-5

y = 3x - 8

Thus, the slope = m = 3

We know that the parallel lines have equal slopes.

So, the slope of a parallel line is also 3

Using the point-slope form of the line equation

y-y_1=m\left(x-x_1\right)

substituting the values m = 3 and the point (3, -4)

y-(-4)=3(x-3)

y+4 = 3x-9

y = 3x-9-4

y = 3x-13

Thus, the  equation for a line that is parallel to y + 5 = 3(x - 1) and goes through the point (3,-4) will be:

  • y = 3x-13
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(See image attached for better comprehension)

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