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3 years ago

Is the percent increase for 50 to 70 = to the percent decrease from 70 to 50

Mathematics

1 answer:

Arisa [49]3 years ago

6 0

Answer:

no it is not equal.

Step-by-step explanation:

when you calculate the percentages, you will find that the increase has 40% while the decrease has about 28.6%

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This is algebra 1 math problem <br>f (×)=2/5x+10

Alina [70]

To find the inverse, interchange the variables and solve for y.

f^−1(x)=−25+5x/2

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3 years ago

8=1/3(a+5)<br><br> Please help and thank you :)

s344n2d4d5 [400]

Answer:

a=19

Step-by-step explanation:

First we have to distribute the parenthesis; multiply (a+5) by 1/3

8=1/3*a+1/3*5

Now we just solve the equation regularly

8=1/3a+5/3

8-5/3=1/3a

6 1/3=1/3a

a=19

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3 years ago

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The sum of the diagonals of a rhombus is 5√2.

Alex

Greetings!
Let ABCD be a rhombus
AC + BD = 5√2 cm

Area of ABCD = Ar△ABD + Ar △BCD
$= \frac{1}{2} \times BD \times AO + \frac{1}{2} \times BD \times OC$
$= \frac{1}{2} BD (AO + OC)$
$\frac{1}{2} BD \times AC$

$So, \frac{ BD \times AC}{2} = 4 \: cm {}^{2}$
$BD \times AC = 8$
$Now, AC + \: BD = 5 \sqrt{2}$

Squaring both sides, we get
$AC {}^{2} + BD {}^{2} + 2 AC.BD =50$
$AC {}^{2} + BD {}^{2} + 2 \times 8 = 50$
$AC {}^{2} + BD {}^{2} = 50 - 16$
$AC {}^{2} + BD {}^{2} = 34$

In △AOB, we have
$OA {}^{2} + OB {}^{2} =AB {}^{2}$
$( \frac{ AC }{2} ) {}^{2} + ( \frac{ BD}{2} ) {}^{2} = AB {}^{2}$
$\frac{ AC {}^{2} } {4} + \frac{ BD {}^{2} }{4} = AB {}^{2}$
$AC {}^{2} + BD {}^{2} = 4 AB {}^{2}$
$34 = 4 AB {}^{2}$

Square rooting both sides
$\sqrt{34} = 2 AB$
$Perimeter = 4 \: AB \\ = 2 \times 2 \: AB \\ = 2 \: \times \sqrt{34 } \\ = 2 \sqrt{34 \: } units$ .

Hope it helps!

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3 years ago

Which number produces a rational number when multipled by 0.5 ?

Sonbull [250]

Your answer should be 2.22

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3 years ago

It takes 6 hours to clean and detail a luxury car. During the morning of

levacccp [35]

The correct answer is hours

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2 years ago

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