1:X = X:81 what number can replace X?

Mathematics

1 answer:

anygoal [31]3 years ago

7 0

Multiply 1/x = x/81 by 81x and you get

... 81 = x²

Taking the square root gives

... x = ±9

Either 9 or -9 can replace X to make the proportion statement true.

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3 years ago

Can you solve: 6/5=n+2/2n-3

OverLord2011 [107]

solving $\frac{6}{5}=\frac{n+2}{2n-3}$ we get value of n: $n=4$

Step-by-step explanation:

Solving the expression:

$\frac{6}{5}=\frac{n+2}{2n-3}$

Solving:

$\frac{6}{5}=\frac{n+2}{2n-3}\\Cross\,\,multiply:\\6(2n-3)=5(n+2)\\Simplifying:\\12n-18=5n+10\\Combining\,\,like\,\,terms:\\12n-5n=10+18\\7n=28\\n=\frac{28}{7}\\n=4$

So, solving $\frac{6}{5}=\frac{n+2}{2n-3}$ we get value of n: $n=4$

Keywords: Solving Expressions

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3 years ago

Can someone like an ace or very good at math help me

eimsori [14]

Supplementary angles , when added, = 180
complimentary angles, when added, = 90

< AQC + < GQC = 180.....supplementary
< BQD + < DQE = 90.......complimentary
< CQE + < EQF = 90.......complimentary
< GQF , < FQE.....neither
< BQC + < DQC = 90....complimentary

< W and < X are supplementary...
if < W = 37, then < X = (180 - 37) = 143

< S and < T are complimentary
if < S = 64, then < T = (90 - 64) = 26

< C and < D are supplementary
if < C = 83, the < D = (180 - 83) = 97

cant read all of the last one.....but if they are complimentary, and
< U = 41, then the other angle is : (90 - 41) = 49

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the length of a rectangle is 4 more than 3 times the width. If the perimeter of the rectangle is 18.4cm, what is the area of the

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