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jasenka [17]
2 years ago
8

Finding the Relationship between Two Quantities

Mathematics
1 answer:
natulia [17]2 years ago
5 0
Next time do you mind sending it in a phot because this is a lot of information
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A construction company is building a fence that is 2/3 mile long. They can build 1/6 mile of fence every hour. How many hours wi
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It will take them 4 hours because if you take 2/3, it is = to 4/6 and 1/6 times 4 is 4/6
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3 years ago
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What two numbers will -2.5 be in between? <br> -2 and 1 <br><br> or<br><br> -3 and 2
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It would be between -3 and 2

Step-by-step explanation:

cause -2.5 is greater than -3 and its less than 2

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3 years ago
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in 2009 a total of R36 000 was invested in two accounts. One account earned 7% annual interest and the other earned 9% .The tota
Akimi4 [234]

a = amount invested at 7%

b = amount invested at 9%

we know the amount invested was ₹36000, thus we know that whatever "a" and "b" are, a + b = 36000.  We can also say that

\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{7\% of a}}{\left( \cfrac{7}{100} \right)a}\implies 0.07a~\hfill \stackrel{\textit{9\% of b}}{\left( \cfrac{7}{100} \right)b}\implies 0.09b

since we know the interest earned from the invested was ₹2920, then we say that 0.07a + 0.09b = 2920.

\begin{cases} a + b = 36000\\\\ 0.07a+0.09b=2920 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{using the 1st equation}}{a + b = 36000\implies \underline{b = 36000-a}}~\hfill \stackrel{\textit{substituting on the 2nd equation}}{0.07a~~ + ~~0.09(\underline{36000-a})~~ = ~~2920} \\\\\\ 0.07a+3240-0.09a=2920\implies 3240-0.02a=2920\implies -0.02a=-320 \\\\\\ a=\cfrac{-320}{-0.02}\implies \boxed{a=16000}~\hfill \boxed{\stackrel{36000~~ - ~~16000}{20000=b}}

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2 years ago
Factor the expression -8x 2+ 22x - 15
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The  answer is: 3(2x-5)

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3 years ago
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What is the measure of the exterior angle?
Nastasia [14]

Answer:

the measure of the exterior angle is 87 degrees.

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3 years ago
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