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Ilia_Sergeevich [38]
3 years ago
15

Which expression is equivalent to 4/5 divided by 8

Mathematics
1 answer:
notsponge [240]3 years ago
6 0
4/5 divided by 8 is 0.1 other than that I don’t know that question is kind of vague
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TanA/secA-1-sinA/1+cosA =2 cotA​
Harlamova29_29 [7]
I don’t not know what this I’m only in the 5th gradensns
5 0
3 years ago
(8x - 6) - (7x - 9)<br><br> I hope you're open to me asking more questions in the reply &lt;3
Gekata [30.6K]

Answer:

x + 3

Step-by-step explanation:

Given

(8x - 6) - (7x - 9)

Distribute the first parenthesis by 1 and the second by - 1

= 8x - 6 - 7x + 9 ← collect like terms

= x + 3

5 0
2 years ago
Find the amount of time. I=$237.90, P=$1525, r=2.6%<br><br> think I=PRT
egoroff_w [7]
AWNER is 6

Hope it helps u
7 0
3 years ago
How much pure acid should be mixed with 6 gallons of a 20% acid solution in order to get a 90% acid solution?
beks73 [17]
So, how much acid is there in 6 gallons?  well is 20% acid or (20/100), so the amount of acid in it just (20/100) * 6 or 1.2, the rest is say water.

now, if we want a 90% solution, and say we add "y" gallons, how much acid is in it?  well (90/100) * y, or 0.9y.

now let's add "x" gallons of pure acid, now, pure acid is just pure acid, so is 100% acid, how much acid is there in it?  (100/100) * x, or 1x or just x.

we know whatever "x" and "y" amounts are, they -> x + 6 = y

and we also know that x + 1.2 = 0.9y

\bf \begin{array}{lccclll}&#10;&\stackrel{gallons}{acid}&\stackrel{acid~\%}{quantity}&\stackrel{acid~gallons}{quantity}\\&#10;&------&------&------\\&#10;\textit{pure acid}&x&1.00&x\\&#10;\textit{20\% sol'n}&6&0.20&1.2\\&#10;------&------&------&------\\\&#10;mixture&y&0.90&0.9y&#10;\end{array}&#10;\\\\\\&#10;\begin{cases}&#10;x+6=\boxed{y}\\&#10;x+1.2=0.9y\\&#10;----------\\&#10;x+1.2=0.9\left( \boxed{x+6} \right)&#10;\end{cases}&#10;\\\\\\&#10;x+1.2=0.9x+5.4\implies x-0.9x=5.4-1.2\implies 0.1x=4.2&#10;\\\\\\&#10;x=\cfrac{4.2}{0.1}\implies x=\stackrel{gallons}{42}
3 0
3 years ago
Help me please , number 3 !
Triss [41]
D.) y= 0.3x

This is because slope is change in y over change in x, so we get 3/10 which is equivalent to 0.3
3 0
2 years ago
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