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garri49 [273]
2 years ago
13

Find each missing value on the trapezoids below

Mathematics
1 answer:
Lostsunrise [7]2 years ago
5 0

Answer:

Step-by-step explanation:

Nov 2, 2018 — And each missing value on the trapezoids below. ... Find. UR. (12x + 3). (7x - 13). (Gr + 6. 5448x+6 =180. 8x=120 x=157. 124+3+ 7x-13= 180.

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Name:
baherus [9]

Step-by-step explanation:

(Explanation is above)

7 0
3 years ago
A pharmacist has 40% and 80% iodine solutions on hand .How many liters of each iodine solutions will be required to produce 6 li
svetoff [14.1K]
So... let's change the concentration percentage to decimal format. .. so 40% is just 4/100 or 0.4  and so on.

\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentration\\
amount
\end{array}\\
&-----&-------&-------\\
\textit{40\% sol'n}&x&0.4&0.4x\\
\textit{80\% sol'n}&y&0.8&0.8y\\
-----&-----&-------&-------\\
mixture&6&0.5&3
\end{array}

so... whatever "x" and "y" may be, we know the must add up to 6 liters.

and whatever 0.4x and 0.8y are, we also know, they must add up to a 3 of concentrated amount.

thus    \bf \begin{cases}
x+y=6\implies \boxed{y}=6-x\\
0.4x+0.8y=3\\
----------\\
0.4x+0.8\left( \boxed{6-x} \right)=3
\end{cases}

solve for "x", to see how much of the 40% solution will be needed.

what about "y"?  well, y = 6 - x.
8 0
4 years ago
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You are the manager of a local charity. You expect 63 donors to begin donating electronically next year. This figure
cluponka [151]

Answer:

237

Step-by-step explanation:

63 / .21 = 300

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300 x .79 = 237

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Answer:14 cubic units

Step-by-step explanation:

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3 years ago
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