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Kitty [74]
3 years ago
10

What property justifies step? 5(x-3)=20 x-3=4

Mathematics
2 answers:
prohojiy [21]3 years ago
7 0
The property of division.
Both sides are divided by 5.
“The division property of equality states that when we divide both sides of an equation by the same non-zero number, the two sides remain equal.”
Ymorist [56]3 years ago
7 0

Answer:

5X-15=20

5x=35

x=7

Step-by-step explanation:

5x-15=20

5x=35

=7

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If a sum invested gains 10% each year how long will it be before it has doubled its<br> value?
Anika [276]

Using an exponential equation, it is found that it will be 7.3 years before the value is doubled.

The equation for an increasing <u>exponential function</u> is given by:

A(t) = A(0)(1 + r)^t

In which:

  • A(0) is the initial amount.
  • r is the growth rate, as a decimal.

In this problem:

  • Gains 10% each year, thus r = 0.1.

The doubling time is t for which A(t) = 2A(0), then:

A(t) = A(0)(1.1)^t

2A(0) = A(0)(1.1)^t

(1.1)^t = 2

\log{(1.1)^t} = \log{2}

t\log{1.1} = \log{2}

t = \frac{\log{2}}{\log{1.1}}

t = 7.3

It will be 7.3 years before the value is doubled.

A similar problem is given at brainly.com/question/23008760

4 0
2 years ago
Given that ABCD is a rectangle, find the perimeter of the figure below. Round your answer to the nearest tenth. *
BARSIC [14]

Answer:

<em><u>ANSWER</u></em><em><u> </u></em><em><u>IS</u></em><em><u> </u></em><em><u>OPTION</u></em><em><u> </u></em><em><u>B</u></em><em><u> </u></em>

<em><u>19.7FT</u></em>

PERIMETER OF FIG.=2 (L+B)-B + PI*R

=2 (6+3)-3 + 3.14*1.5

=18-3+4.71

=15+4.71

=19.71

=19.7 ft

6 0
3 years ago
2. Gabby spent $3.60 for stamps to mail packages. Some were 30C/stamps and the rest
lesya [120]
8 of 30c and 6 of 20c.
7 0
3 years ago
A regular hexagon has a perimeter of 18x - 30. What is the length of each side?
Ksenya-84 [330]
The answer would be 3x - 5 
Hope this helps!!!

4 0
3 years ago
What is the greatest common factor for 20y^9+5y^6
kompoz [17]

Answer:

Your answer would be 5y=6

Hope this helps!

3 0
3 years ago
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