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3 years ago

2x/7 divides by 4y/14?

1 answer:

7 0

Remember that $\frac{\frac{a}{b}}{\frac{c}{d}}=(\frac{a}{b})(\frac{d}{c})=\frac{ad}{bc}$

try and simpliy each first
4y/14=(2/2)(2y/7)=2y/7

so 2x/7 divided by 2y/7
$\frac{\frac{2x}{7}}{\frac{2y}{7}}=(\frac{2x}{7})(\frac{7}{2y})=\frac{(2x)(7)}{(2y)(7)}$ = $\frac{14x}{14y}=\frac{x}{y}$

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PLEASE HELP 25 POINTSS I WILL GIVE BRAILIEST

kykrilka [37]

The solution to the system of equation is (1, 4).

In order to find this, we can first just see where the graphs intersect each other. This will give us the solution set.

As for what it represents, the x value in the increase in temperature and the y value is the increase in customers.

Therefore, we know that we want the temperature to go up by 1 (although we don't know the units) and that would result in the amount of people coming, and staying longer by 4 (again, we don't know the units of measure).

6 0

4 years ago

A pharmacist has 40% and 60% iodine solutions on hand. How many liters of each item solution will be required to produce 8 L of

jok3333 [9.3K]

Answer:

The quantity of 40 % solution is 4 liters and

The quantity of 60 % solution is 4 liters .

Step-by-step explanation:

Given as

A pharmacist has 40% and 60% iodine solutions on hand.

Let the quantity of 40 % iodine solutions = x liter

And The quantity of 60 % iodine solutions = y liter

The total quantity of iodine mixture = 8 liter

I.e The quantity of 40 % iodine solutions + the quantity of 60 % iodine solutions = 8 Liter

or x + y = 8

The The percentage of mixture solution = 50 %

∴ 40 % of x + 60 % of y = 50 % of 8

I.e 40 x + 60 y = 400 ..........A

And x + y = 8

Or, 40× ( x + y ) = 40× 8

or, 40 x + 40 y = 320 ...........B

Now , solving equations A and B

I.e ( 40 x + 60 y ) - ( 40 x + 40 y ) = 400 - 320

Or, ( 40 x - 40 x ) + ( 60 y - 40 y ) = 80

Or, 0 + 20 y = 80

∴ y = $\frac{80}{20}$

I.e y = 4 liters

So, The quantity of 60 % iodine solution = y = 4 liters

Put The value of y in Eq A

So , 40 x + 60 × 4 = 400

Or, 40 x = 400 - 240

or, 40 x = 160

∴ x = $\frac{160}{40}$

I.e x = 4 liter

So, The quantity of 40 % iodine solution = x = 4 liters

Hence The quantity of 40 % solution is 4 liters and the quantity of 60 % solution is 4 liters . Answer

3 0

3 years ago

What is the exact volume of the cylinder?

devlian [24]

Answer:A cylinder is a simple geometric shape with two equally-sized and parallel circular bases. Calculating the volume of a cylinder is simple once you know the formula.

Step-by-step explanation:

6 0

3 years ago

(8+4i)-(5-2i) simplify

Marrrta [24]

Answer:

$\displaystyle \boxed{6i + 3}$

Step-by-step explanation:

To avoid confusion, distribute that negative.

I am joyous to assist you anytime.

8 0

4 years ago

Which number should each side of the equation 4/5x=8 be multiplied by to produce he equivalent equation of x=10?

gulaghasi [49]

<< Add $.\frac{-4}{5}$ to the left and right of the equation, multiple and make ''opposite multiplation'' to find x.

A) $\frac{4}{5x}. \frac{-4}{5} = 8. \frac{-4}{5} 
$
$\frac{16}{25x} = \frac{-32}{5}$
25x.(-32)= (-16).5
-800x= -80

**to leave x alone and positive, you must divide to -800.
$x= \frac{-80}{-800}$
$x= \frac{1}{10}$
= INCORRECT

B) $\frac{4}{5x} . \frac{1}{5} = 8. \frac{1}{5} 
$
$\frac{4}{25x} = \frac{8}{5}$
$25x.8= 4.5$
$200x=20
$
$x= \frac{20}{200} = \frac{1}{10}$

C) $\frac{4}{5x} . \frac{5}{4}= \frac{8.5}{4}$
$\frac{1}{x} = \frac{40}{4}$
$\frac{1}{x} =10$
10x=1
$x= \frac{1}{10}$

D) $\frac{4.5}{5x} = 8.5$
$\frac{4}{x} = 40$
40x= 4
x= $\frac{4}{40}$ = 1/10

I think there is a problem with the options :D

5 0

4 years ago