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3 years ago

Please help and explain if so thank you

Mathematics

1 answer:

AVprozaik [17]3 years ago

7 0

How many days are in a year? 365. it started out as 88 inches subtracted that by 115 then add the 3.

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Solve the algebraic expression , is it equivalent?

Vladimir [108]

Answer:

Step-by-step explanation:

When you distribute the -2 you get 6x -2x+2. When you simplify it you get 4x+2 which is different than 4x-2.

6 0

2 years ago

A chemist wishes to mix a solution that is 6% acid. She has on hand 14 liters of a 4% acid solution and wishes to add some 10% a

jonny [76]

she should add 7 liters of 10% acid solution

Explanation

Step 1

set the equation:

a) let X represents the amount os solution that is 4% acid

let Y represents the amount os solution that is 10% acid

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(x+y) \\ \end{gathered}$

if he has 14 liters of 4% acid solution

$x=14$

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ \frac{4}{100}*14+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ 0.56+0.1Y=0.06(14+Y) \\ 0.56+0.1Y=0.84+0.06Y \\ \end{gathered}$

Step 2

solve the equation :

$\begin{gathered} 0.56+0.1Y=0.84+0.06Y \\ subtract\text{ 0.06Y in both sides} \\ 0.56+0.1Y-0.06Y=0.84+0.06Y-0.06Y \\ 0.56+0.04Y=0.84 \\ subtract\text{ 0.56 in both sides} \\ 0.56+0.04Y-0.56=0.84-0.56 \\ 0.04Y=0.28 \\ divide\text{ both sides by 0.04} \\ \frac{0.04Y}{0.04}=\frac{0.28}{0.04} \\ Y=7 \end{gathered}$

therefore,

she should add 7 liters of 10% acid solution

I hope this helps you

8 0

1 year ago

What is the answer to 4m+7=-3m+49

solong [7]

4m + 7 = -3m + 49
4m + 3m = 49 - 7
7m = 42
m = 42/7
m = 6

So, your final answer is 6

Hope this helps!

8 0

2 years ago

The shoe store has twice as many black shoes as it does brown shoes. The total number of shoes is 66. How many brown shoes are t

fredd [130]

<span>x=number of brown shoes
2x=number of black shoes (twice as many black shoes as brown shoes)
so x+2x=66
add like terms 3x=66
solve for x by dividing 3; x=22
so there are 22 brown shoes and 44 black shoes (2 x 22= 44)</span>

5 0

3 years ago

4. Sebastian's lemonade recipe uses 4 cups

san4es73 [151]

4 + 1 = 5

1/5 = 0.2

0.2 = 20%

3 0

1 year ago