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Juliette [100K]
3 years ago
15

If you blank or blank by a number you must blank the equality sign

Mathematics
1 answer:
LenaWriter [7]3 years ago
5 0
If you add or subtract by a number you must add the equality sign
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HELP HELP HELP <br> HELP HELP HELP<br> HELP HELP HELP
alisha [4.7K]

Using proportions, the lengths of the unknown sides are given as follows:

  • 2x = 10.
  • x - 3 = 2.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

In this problem, the triangles are similar, hence the lengths of it's sides follow the proportion given next:

\frac{2x}{4} = \frac{5}{x - 3}

Applying cross multiplication:

2x(x - 3) = 20

2x² - 6x - 20 = 0

x² - 3x - 10 = 0

(x - 5)(x + 2) = 0.

Then the positive solution is:

x - 5 = 0 -> x = 5.

And the lenghts are:

  • 2x = 10.
  • x - 3 = 2.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

8 0
2 years ago
10 points and brainliest. solve by elimination
evablogger [386]

Answer:

(3,-7) I think.

Step-by-step explanation:

3 0
3 years ago
Which of the following correctly expresses the number below in scientific
Sindrei [870]

Answer:

D.) 5.19×10^{-5}

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Since we moved to right 5 places, the exponent is -5.

4 0
4 years ago
I need to graph -0.2x- 0.6y = 0.12
olga2289 [7]
This is under point slope intercept. so Ax+Bx=Cx. you can always change this to slope intercept which will be -.6y=.2x+.12 then give 1 a variable like 1 or 2 or something. then solve it, -.6y=.2+.12, -.6y=.32, y=-.53 so when x is 1, y is -.53. then make x 2 so -.6y=.52 so then when x is 2 y is -.86
6 0
3 years ago
Read 2 more answers
What does 5.94 mean in inches
andriy [413]
It means about 15 centimeters
3 0
3 years ago
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