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masha68 [24]
2 years ago
11

Darien could swim 30 laps an

Mathematics
2 answers:
fredd [130]2 years ago
8 0

Answer:

D

Step-by-step explanation:

If the percent change is 30 to 36 you can already see that it is an increase

here is the work

36 - 30

30

x 100% = 20%

kondaur [170]2 years ago
6 0

Answer:

20% increase, which corresponds to the light

Step-by-step explanation:

(y - x)/x * 100

(36 - 30)/30 * 100

(6 * 100)/30

600/30

20% increase

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2m+(m-15)=90 solve for m
Ronch [10]

Answer:

m = 35

Step-by-step explanation:

2m + m -15 = 90

3m -15 = 90

     +15  +15

3m = 105

/3     /3

m = 35

To check the work just insert 35 for m:

2(35) + 35 -15 = 90

70 + 35 -15 = 90

105 - 15 = 90

90 = 90

5 0
2 years ago
An 18-foot board is leaning against a wall. It is set 6 feet from the base of the wall. How far up the wall does the board reach
pav-90 [236]

Answer: 19

Step-by-step explanation:

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2 years ago
Given the following parallelograms find...
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step by step explanation:
3 0
3 years ago
Can you help me please?
morpeh [17]

\bf 3\sqrt{2}-\sqrt{50}+3-\sqrt{8}+\sqrt{288}-\sqrt{9}~~ \begin{cases} 50=2\cdot 5\cdot 5\\ \qquad 2\cdot 5^2\\ 8=2\cdot 2\cdot 2\\ \qquad 2^2\cdot 2\\ 288=2\cdot 2\cdot 2\cdot 2\cdot 2\cdot 3\cdot 3\\ \qquad 2^4\cdot 2\cdot 3^2\\ \qquad 2 (2^2)^2 3^2\\ \qquad 2(2^2 3)^2\\ \qquad 2(12)^2\\ 9=3^2 \end{cases}


\bf 3\sqrt{2}-\sqrt{2\cdot 5^2}+3-\sqrt{2^2\cdot 2}+\sqrt{2\cdot 12^2}-\sqrt{3^2} \\\\\\ 3\sqrt{2}-5\sqrt{2}+3-2\sqrt{2}+12\sqrt{2}-3 \\\\\\ 3\sqrt{2}-5\sqrt{2}-2\sqrt{2}+12\sqrt{2}+3-3\implies \stackrel{\textit{adding like-terms}}{8\sqrt{2}}

7 0
3 years ago
Solve for X plz plz plz plz
Sliva [168]

Answer:

Step-by-step explanation:

B/c they are similar triangles we can set the sides ratio's equal to each other again

7x + 6 / 56  = 78 /91

does it kind of makes sense why I'm able to set those two ratio's equal?

it's the tough part of these problems... understanding why that works

the rest is just algebra.. My calc II professor always told us our algebra sucks. :D he was funny,

anyway, use your mad algebra skilz on the above equation

7x + 6 = 56(78/91)

7x + 6 = 4368 / 91

7x + 6 = 48

7x = 48 - 6

7x = 42

x = 6

:)

6 0
3 years ago
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