Question

A solution of salt and water contains 50 grams of water per 100 milliliters of the solution. If 1 mole of water weighs 16 grams, _____ moles of water would be present in 25 milliliters of the solution. [Round off your answer to two decimal places]

Answer 1

use ratio and proportion

Answer 2

I honestly don't know the answer to this and I'm trying to finish two module tests before I get withdrawn.. :(

Answer 3

And I need help with a few more :/

Answer 4

\[\frac{ 50 }{ 100 } = \frac{ x }{ 25 }\]

Answer 5

now solve for x. x is the number of grams of water

Answer 6

12.5?

Answer 7

\[\frac{ 1 }{ 16 } = \frac{ y }{ 12.5 }\]

Answer 8

I'm lost now

Answer 9

since you have 12.5 as your answer, you try substitute it for another ratio & proportion that will indicate the number of moles..

Answer 10

try to reread the problem and understand the ratio & proportion i'm talking about

Answer 11

I'm so confused.

Answer 12

I'm sorry, algebra is my worst subject.

Answer 13

50gms of water per 100 mil
so how much grm of water wud 1 mil contain

Answer 14

0.78125?

Answer 15

in finding the number of grams of water for a 25mL solution, we'll refer it to the given data that 50 grams does have 100 mL using ratio & proportion

Answer 16

1 gram water per 2 ml solution

Answer 17

50/100=0.5(per mil)

Answer 18

yep but you're asked to have it rounded to two decimal places

Answer 19

12.5 grams water per 25 ml solution

Answer 20

1mole= 16gms

Answer 21

1 16
x 12.5

Answer 22

12.5/16 =?

Answer 23

That equals 0.78125 right?

Answer 24

I don't get the two decimal part..

Answer 25

the ans wud be 0.78

Answer 26

the answer would be 0.78

Answer 27

Can you help with a few more?

Answer 28

the two decimal places as it is asked in the problem indicates that you're to round it off such that there are only two numbers after the decimal point

Answer 29

or to the right of the decimal point

Answer 30

Okay!

The regular price of a child's entry ticket to a water park is $6 less than that for an adult's. The park offers half off all entry tickets during the off-peak season. The Jordans paid a total of $69 for 2 adult tickets and 1 child's ticket to the water park during the off-peak season. The following equation represents this situation, where x represents the regular price of an adult ticket. :

69 = x + one-half(x - 6)

What is the regular price of a child's ticket?

$38

$42

$48

$66

Answer 31

the ans is 42

Answer 32

Thank you!




The radius of a cone-shaped tank is 4 feet less than its height. If the height of the tank is (x - 3) feet, the expression below shows the volume of the tank:

1 over 3π (x - 7)2 (x - 3)

What does the factor π(x - 7)2 (x - 3) represent?

The area of the base of the tank

The area of the curved sides of the tank

The volume of 3 of the same cone-shaped tanks

The volume of 6 of the same cone-shaped tanks

Answer 33

the question mark things are the pi sign

Answer 34

sorry mate geometry is not my thing

Answer 35

Simplify the following expression
x - 4y + 5z - 3x - y + 2z = ?.

2x - 5y + 7z

-2x - 5y - 7z

-2x - 5y + 7z

-2x -5y + 3z

Answer 36

-2x-5y+7z

Answer 37

Yay got it right haha.



Evaluate: -3 - (-6).

-3

-18

-9

3

Answer 38

-3+6=3

Answer 39

Which table best represents the steps to solve the equation x over 8 - 5 = -1?

Step Justification
Step 1: x over 8 = -1 + 5 The same number + 5 can be added to both sides of the equation
Step 2: x over 8 = 4 Adding -1 and 5 on the right hand side
Step 3: x = 4 • 8 The same number 8 can be multiplied on both sides of the equation
Step 4: x = 32 Multiplying 4 and 8 on the right hand side

Step Justification
Step 1: x over 8 = -1 - 5 The same number - 5 can be added to both sides of the equation
Step 2: x over 8 = -6 Adding -1 and -5 on the right hand side
Step 3: x = -6 • 8 The same number 8 can be multiplied on both sides of the equation
Step 4: x = -48 Multiplying -6 and 8 on the right hand side

Step Justification
Step 1: x over 8 = -1 + 5 The same number - 5 can be added to both sides of the equation
Step 2: x over 8 = 4 Adding -1 and 5 on the right hand side
Step 3: x = 4 - 8 The same number 8 can be subtracted on both sides of the equation
Step 4: x = -4 Subtracting 8 from 4 on the right hand side

Step Justification
Step 1: x over 8 = -1 + 5 The same number + 5 can be added to both sides of the equation
Step 2: x over 8 = 4 Adding -1 and 5 on the right hand side
Step 3: x = 8 ÷ 4 The same number 8 can be divided on both sides of the equation
Step 4: x = 2 Subtracting 8 from 4 on the right hand side

Answer 40

the volume of 3 of the same cone-shaped tanks

Answer 41

u mean x/8 -5=-1

Answer 42

the 1st one is the correct method

Answer 43

Okay, thank you so much!!

Answer 44

np mate c:

Answer 45

Rita's company reimburses her expenses on food, lodging, and conveyance during business trips. The company pays $55 a day for food and lodging and $0.45 for each mile traveled. Rita drove 300 miles and was reimbursed $2,335.

Part A: Create an equation that will determine the number of days x on the trip (3 points)

Part B: Solve this equation justifying each step with an algebraic property of equality. (6 points)

Part C: How many days did Rita spend on this trip? (1 points)