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3 years ago

Whats the inverse if 2 5/8

Mathematics

1 answer:

enot [183]3 years ago

8 0

Answer:

$\frac{8}{21}$

Step-by-step explanation:

Given:

$2\frac{5}{8}=\frac{8*2+5}{8}$

Mutliply :

$2\frac{5}{8} =\frac{16+5}{8}$

Add:

$2\frac{5}{8} =\frac{21}{8}$

Multiplicative inverse:

$2\frac{5}{8} =\frac{8}{21}$

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If y varies directly as x and y = 144 when x = 12, what is the value of y when x = 17?

olasank [31]

Direct variation:
$y=kx$

y=144 when x=12.
$144=12k \\ k=\frac{144}{12} \\ k=12$

y=? when x=17.
$y=12 \times 17 \\
y=204$

y=204 when x=17.

6 0

3 years ago

Either table a or table b shows a proportional relationship.

Nostrana [21]

table A because they are the fame proportion

7 0

3 years ago

What is negative three, times 4x plus 2

alexgriva [62]

-10 or X=1.25

hope this helps

4 0

3 years ago

I have to find slope-intercept equation

adoni [48]

Answer:

y = 4x - 9

Step-by-step explanation:

y = mx + b

m = slope

b = y-intercept

the y-intercept is when the line crosses the y axis, and in this case we can see it at "-9"

The slope we can do rise over run "r/r" ot "y/x"

r/r = 4/1 = 4

The line is positive since its going up

y = 4x - 9

Hope this helped!

Have a supercalifragilisticexpialidocious day!

7 0

3 years ago

Solve for x<br><img src="https://tex.z-dn.net/?f=0%20%3D%20%20-%20%7B%20e%20%7D%5E%7B%20-%20x%7D%20%20%2B%203%20%7Be%7D%5E%7B3x%

Brilliant_brown [7]

$\bf \textit{Logarithm Cancellation Rules} \\\\ \stackrel{\stackrel{\textit{we'll use this one}}{\downarrow }}{log_a a^x = x}\qquad \qquad a^{log_a x}=x~\hfill\stackrel{recall}{ln=log_e}\qquad log_e(e^z)=z \\\\[-0.35em] \rule{34em}{0.25pt}$

$\bf 0=-e^{-x}+3e^{3x}\implies e^{-x}=3e^{3x}\implies \cfrac{1}{e^x}=3e^{3x}\implies 1=e^x\cdot 3e^{3x} \\\\\\ 1=3e^xe^{3x}\implies \cfrac{1}{3}=e^{x+3x}\implies \cfrac{1}{3}=e^{4x}\implies ln\left( \cfrac{1}{3} \right)=ln\left( e^{4x} \right) \\\\\\ ln\left( \cfrac{1}{3} \right)=4x\implies \cfrac{ln\left( \frac{1}{3} \right)}{4}=x$

and you plug that in your calculator to get about -0.27465307216702742285.

8 0

3 years ago