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GuDViN [60]
3 years ago
14

Eleven members of the Middle School Math Club each paid the same amount for a guest speaker to talk about problem solving at the

ir math club meeting. They paid their guest speaker $1−A−2−. What is the missing digit A of this 3-digit number?
Mathematics
1 answer:
RSB [31]3 years ago
4 0
So what we know is that there is a number 1?2 that is divisible by 11.

what was 11 multiplied by to get this number?  it must start with "1" since 1*1=1 and end with "2" since 1*2=2 and there is 2 at the end of the product .

so let's try: what is 11*12? 132? yes, that sounds good!

so the missing number is 3 and they each paid 12 dollars.
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Which of the following best describes perpendicular lines
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B.

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Perpendicular lines always intercept at a right angle (90 degrees).

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The ratio of surface areas of two similar polyhedra is equal to the cube of the
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3 years ago
How tall is a tree which is 15 feet shorter than a pole that is 3 times as tall as the tree?
Citrus2011 [14]
<h2>Height of tree is 7.5 feet</h2>

Step-by-step explanation:

Let t be the height of pole.

Given that the tree is 5 feet shorter than a pole.

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Also given that the pole is 3 times as tall as the tree.

Height of pole = 3t

So we have

              t + 15 = 3t

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7 0
3 years ago
How do you simplify this expression step by step?
nataly862011 [7]

\bf \textit{Pythagorean Identities} \\\\ sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{csc(\theta )-sin(\theta )}{cos(\theta )}\implies \cfrac{~~\frac{1}{sin(\theta )}-sin(\theta )~~}{cos(\theta )}\implies \cfrac{~~\frac{1-sin^2(\theta )}{sin(\theta )}~~}{cos(\theta )}

\bf \cfrac{1-sin^2(\theta )}{sin(\theta )}\cdot \cfrac{1}{cos(\theta )}\implies \cfrac{\stackrel{cos(\theta )}{\begin{matrix} cos^2(\theta ) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}} }{sin(\theta )}\cdot \cfrac{1}{\begin{matrix} cos(\theta ) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} }\implies \cfrac{cos(\theta )}{sin(\theta )}\implies cot(\theta )

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3 years ago
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