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belka [17]
3 years ago
5

Anita Read 24 Pages Of Her Book In 12 Minutes . How Long Will It Take Her To Read 34 Pages ?

Mathematics
1 answer:
Digiron [165]3 years ago
7 0
17 minutes In order to solve this you make a porportion: 24/12=34/x You do (34×12)÷24 34×12=408 408÷24= 17 ~JZ Hope IT helps you
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(3x-7)+(-4x-8)........ what is the sum of this pls
yarga [219]

Answer:

(3x-7)+(-4x-8)

3x-7-4x-8

3x-4x-7-8

-x-15

6 0
2 years ago
A chemistry teacher needs to mix a 20% salt solution with an 80% salt solution to make 20 qt of a 40% salt solution. How many qu
Svetlanka [38]

Answer:

  • 6 2/3 qt 80%
  • 13 1/3 qt 20%

Step-by-step explanation:

It is often convenient to solve a mixture problem by letting a variable represent the quantity of the higher-concentration contributor to the mix.

__

We can let x represent the number of quarts of 80% solution needed. Then (20-x) is the number of quarts of 20% solution needed. The amount of salt in the final mix is ...

  0.80x +0.20(20-x) = 0.40(20)

  0.60x = 0.20(20) . . . . . . . . subtract 0.20(20) and simplify

  x = 20/3 = 6 2/3 . . . . . . . . . divide by 0.60; quarts of 80% solution

  (20 -x) = 13 1/3 . . . . . . . . . . amount of 20% solution needed

The teacher should mix 6 2/3 quarts of 80% solution with 13 1/3 quarts of 20% solution.

3 0
2 years ago
Given: M(-4,-1), B(-5,-3) find the midpoint
Dmitry [639]
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
M&({{ -4}}\quad ,&{{ -1}})\quad 
%  (c,d)
B&({{ -5}}\quad ,&{{ -3}})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left(\cfrac{{{ -5}}-4}{2}\quad ,\quad \cfrac{-3-1}{2} \right)
4 0
3 years ago
Read 2 more answers
Find the lengths of side BC.<br> Give your answer to 3 significant figures.
Alinara [238K]

Step-by-step explanation:

since we are required to find side |BC| and the value of side |AB| is given as 6.3 cm

hence we find the cosine of the given angle...

cos71 = adjacent ÷ hypotenuse

cos71 = |AB| ÷ |BC|

cos 71 = 6.3 ÷ |BC|

|BC| = 6.3 ÷ 0.325

|BC| = 19.4 cm

4 0
3 years ago
selena drove at an average speed of 50.55 miles per hour for 1.75 hours. she stopped at a rest stop and then drove at an average
zalisa [80]
She cover more distance after rest 101.7-88.4625=13.2375
6 0
2 years ago
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