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otez555 [7]
3 years ago
9

What is the slope of the line that passes through the points -10,9 and -12,7

Mathematics
1 answer:
xeze [42]3 years ago
3 0

Answer:

slope 1

Step-by-step explanation:

change in y over cahnge in x

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Which expression is equivalent to x + x + x + 5 + 5, no matter what value is substituted in for x?
Novosadov [1.4K]
D)3x + 10

Because you add up the x's and the 2 5's
4 0
3 years ago
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John bought a rectangle door mat that was 1/2 meter long and 3/10 meter wide. What is the area of the door mat
baherus [9]
Hello there!

To start, the area of a rectangle is found by multiplying together its length and width.

In this case, the length is 1/2 and the width is 3/10, so you can represent the area using this expression:
\frac{1}{2}×\frac{3}{10}

Now, multiply straight across, the numerator times the numerator over the denominator times the denominator.

This would result in your final answer, \frac{3}{20}.

Therefore, the area of the rectangular door mat would be \frac{3}{20} meters squared.
3 0
4 years ago
How much of a 14% iodine solution should be added to 89 ounces of a 47% iodine solution to get a 29% solution
Elza [17]
Whatever% of anything is just (whatever/100) * anything.

x = ounces of 14% iodine.

y = ounces of 29% iodine.

we know that in a 14% iodine solution, 14% is iodine and the rest is something else, we also know that "x" ounces of the solution have 14% of iodine, how much is that?  (14/100) * x, or 0.14x.

likewise, in the 89 ounces of 47% solution there is (47/100) * 89 of iodine.

and likewise as well, in "y" ounces of 29% iodine there is (29/100) * y, or 0.29y of iodine.

bearing in mind that, whatever "x" and "y" may be, x + 89 = y, and that the sum of the iodine amounts also will equate 0.29y.

\bf \begin{array}{lccclll}
&\stackrel{ounces}{amount}&\stackrel{\%~of~iodine}{quantity}&\stackrel{iodine~oz}{amount}\\
&------&------&------\\
\textit{14\% solution}&x&0.14&0.14x\\
\textit{47\% solution}&89&0.47&41.83\\
------&------&------&------\\
mixture&y&0.29&0.29y
\end{array}
\\\\\\
\begin{cases}
x+89=\boxed{y}\\
0.14x+41.83=0.29y\\
--------------\\
0.14x+41.83=0.29\left( \boxed{x+89} \right)
\end{cases}
\\\\\\
0.14x+41.83=0.29x+25.81\implies 16.02=0.15x
\\\\\\
\cfrac{16.02}{0.15}=x\implies 106.8=x
6 0
3 years ago
Find the sum of A and B: A=5+7i, B=7+4i
ale4655 [162]

Answer:

add real numbers together and imaginary numbers together

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Step-by-step explanation:

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the median is the middle number find the middle number of these and there's your answer

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