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pantera1 [17]
3 years ago
13

Saul earned $25 for painting his neighbor's fence. He spent $11 at the store and put the rest into his bank account.

Mathematics
2 answers:
castortr0y [4]3 years ago
8 0
Saul put $14 in the bank
rjkz [21]3 years ago
6 0

Answer:

He put 14$ in the bank

Step-by-step explanation:

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Use the binomial theorem to write the binomial expansion of (x+3)4 but the 4 is Square
Vladimir [108]
(x+3)^4=(x+3)^2)^2=(x^2+6x+9)^2=x^4+36x^2+81+12x^3+108x
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2 years ago
URGENT
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Answer:

the last statement is true

Step-by-step explanation:

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8 0
3 years ago
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Find the values for each dot plot.
Reika [66]
For range it’s highest number minus lowest number so:
28 - 21 = 7

For median it’s the middle number:
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7 0
3 years ago
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irga5000 [103]
Is this question asking for descriptions?
3 0
2 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}
&\stackrel{gallons}{acid}&\stackrel{acid~\%}{quantity}&\stackrel{acid~gallons}{quantity}\\
&------&------&------\\
\textit{pure acid}&x&1.00&x\\
\textit{20\% sol'n}&6&0.20&1.2\\
------&------&------&------\\\
mixture&y&0.90&0.9y
\end{array}
\\\\\\
\begin{cases}
x+6=\boxed{y}\\
x+1.2=0.9y\\
----------\\
x+1.2=0.9\left( \boxed{x+6} \right)
\end{cases}
\\\\\\
x+1.2=0.9x+5.4\implies x-0.9x=5.4-1.2\implies 0.1x=4.2
\\\\\\
x=\cfrac{4.2}{0.1}\implies x=\stackrel{gallons}{42}
3 0
3 years ago
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