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Katen [24]
3 years ago
10

Simplify -3y(y + 2)^2 - 5 + 6y

Mathematics
2 answers:
ser-zykov [4K]3 years ago
7 0

Answer:

That'll help a lot of people in the future ^.^

Step-by-step explanation:

tigry1 [53]3 years ago
5 0

Answer:

-3y^3 - 12y^2 - 6y - 5.

Step-by-step explanation:

-3y(y + 2)^2 - 5 + 6y

= -3y(y^2 + 4y + 4) - 5 + 6y

= -3y^3 - 12y^2 - 12y - 5 + 6y

= -3y^3 - 12y^2 - 6y - 5.

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3 years ago
Find the interest due on $600 at 9.5% for 120 days.
KATRIN_1 [288]

Answer:

Interest= $ 18.73

Step-by-step explanation:

Given : $600 at 9.5% for 120 days

To find : Find the interest due

Solution :

Simple interest formula  I=P\times r\times t

Principle(P)=$600 , rate(r)=9.5%=0.095 , time (t)= 120 days

In years, 1 year = 365 days

1 day = \frac{1}{365} year

120 days = \frac{120}{365} year

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5 0
3 years ago
Read 2 more answers
A metallurgist has an alloy with 5% titanium and an alloy with 30% titanium. He needs 100 grams of an alloy with 15% titanium. H
andrey2020 [161]
Let us convert the percentages to decimal format first.. so 5% is just 5/100 or 0.05 and 15% is just 15/100 or 0.15

so hmmm, so, let's say it needs "x" amount and "y" amount of each respectively, so, whatever "x" and "y" are, they must add up to 100, and whatever their concentration is, must add up to what the mixture yields

thus

\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentrated\\
amount
\end{array}\\
&-----&-------&-------\\
\textit{5\% alloy}&x&0.05&0.05x\\
\textit{30\% alloy}&y&0.30&0.3y\\
-----&-----&-------&-------\\
mixture&100&0.15&15
\end{array}
\\\\\\
\begin{cases}
x+y=100\implies \boxed{y}=100-x\\
0.05x+0.3y=15\\
----------\\
0.5x+0.3\left( \boxed{100-x} \right)=15
\end{cases}

solve for "x"

what's "y"? well, y = 100 - x
4 0
3 years ago
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