A chemist needs 40 liters of a solution that is 20% acid for a certain experiment, but she has
only a solution that is 15% acid and a solution that is 40% acid. How many liters of the 15% and
the 40% solutions should she mix to get what she needs?

Answers

Answer 1
10 L total x= 5% 10-x equals 40%Amount of ingredients= Final amount.05x . 40(10- X)=.20(10) solve for ‘x’ The amount Of 5% then 10-x= 40% amount

Related Questions

Please help! Find the value of X. Round to the nearest tenth. acellus

Answers

9514 1404 393

Answer:

  38.2°

Step-by-step explanation:

The law of sines tells you ...

  sin(x)/15 = sin(27°)/11

  sin(x) = (15/11)sin(27°) . . . . . multiply by 15

  x = arcsin((15/11)sin(27°)) ≈ arcsin(0.619078) ≈ 38.2488°

  x ≈ 38.2°

_____

Additional comment

In "law of sines" problems, you need to identify a side and opposite angle that you know both values of. Then, you need to identify whether you're looking for an angle or a side, and whether its opposite side or angle is known. If two angles are known, you can always figure the third from the sum of angles in a triangle.

Here, we have angle 27° opposite side 11. We are looking for an angle, and we know its opposite side. This lets us use the ratio formula directly. Since the angle is the unknown, it is useful to write the equation with sines on top and sides on the bottom.

The given angle is opposite the shorter of the given sides, so this triangle has two solutions. We assume that we want the solution that is an acute angle  (141.8° is the other solution). That assumption is based on the drawing. Usually, you're cautioned not to take the drawings at face value.

The table shows the fees to park in a parking lot.
first hour = $1
second hour = $1.50
each additional hour or part of an hour = $2.
How much does it cost to park for 4 1/2 hours?

Answers

Answer:

$7.50

Step-by-step explanation:

4 1/2 hours total

1st hour = $1.00 ;  3 1/2 hrs remaining

2nd hour = $1.50 ;  2 1/2 hrs remaining

after 2 hours you pay $2 per hour so 2.5 x 2 = $5.00

The product of 3 and q increased by 7 is equal to the
sum of q and 3. Find q.

Answers

Answer:

-2

Step-by-step explanation:

3q + 7 = q +3

Bring the variables to one side and the numbers to the other

3q - q = 3 -7

2q = -4

q = -2

Hope this helps!

Jeremy used 5/6 slices of bread throughout the week. If there was 24 slices of bread, how many slices did Jeremy use?

Answers

18

18

18

18 dude the answer is 18

Answer:

18

Step-by-step explanation:

PLZZZZZ HELP IT IS DUE IN 5 MINUTES

Answers

i’m pretty sure it’s D

ASAP I WILL GIVE BRAINLIEST

Which statements apply to the expression 5 ?

The answers/options r in the pic​

Answers

Answer:

ok so in my math class I just learned this so sry if I am wrong but so

Answer:

Options 1, 3, 4, 7

Step-by-step explanation:

I'm guessing you meant the expression 3/5^3.

The base would be 3/5 because that is the number that the exponent is raising.

The exponent is 3 because that's the small number above and to the right of 3/5.

The expanded form is 3/5 × 3/5 × 3/5 because there's an exponent of 3. An exponent means you multiply the number by itself, the number of times it's being raised to. The exponent is 3 and 3/5 is being multiplied 3 times.

The solution would be 27/125 because when you multiply fractions, you just multiply straight across. 3 × 3 × 3 is 27 and 5 × 5 × 5 is 125.

I hope this makes sense, it's kinda hard to make it understandable without being able to actually talk to you.

A line and a point ____ intersect

Answers

Answer: does

Step-by-step explanation:

Does...............................

Need help with math points and brainlest

Answers

Answer:

22.5 cm

Step-by-step explanation:

Answer:

22.5

Step-by-step explanation:

13.5 / 9 = x / 15

A_________is a set that is contained in a larger set.

Answers

A subset is a set that is contained in a larger set.

A rectangle has the dimensions 2.3 x 2.1. If I want a rectangle that has the area 16 times the size of the original rectangle, what will be my new dimensions?

Answers

Answer:

Either 36,8 × 2,1 or 2,3 × 33,6

-7z-2=12.
can u please show the work also

Answers

Answer:

z = -2

Step-by-step explanation:

-7z -2 = 12

-7z = 14 (add 2 on both sides)

z = -2 (divide -7 on boths sides)

z = -2

-7z = 12 + 2

-7z = 14

z = -14/7

z = -2

In slope-intercept form, the equation of the line with a slope of 7 and a y-intercept of (0, -8) is ________
. Do not include spaces in your answer.

Answers

Answer:

y = 7x - 8

General Formulas and Concepts:

Algebra I

Slope-Intercept Form: y = mx + b

m - slope b - y-intercept

Step-by-step explanation:

Step 1: Define

Slope m = 7

y-intercept b = -8

Step 2: Write Function

Substitute in parts.

y = 7x - 8

what is 12 more than m

Answers

What? You’ve got a picture or something?

The price of lunch in the school cafeteria was 2.50$ last year this year the price is 2.70$. What is the percent increase

Answers

Answer:

8 percent

Step-by-step explanation:

There is an 8 percent increase, because if you do 20 cents divided by 250 cents, you get 0.08, which is 8 percent. Also to double check, you can do 250 * 1.08. By the way, that is some rip off lunch.

please help using elimination !

7x+2y=24 8x+2y=30

Answers

Answer:

-x=-6

x=6

7(6)+2y=24

42+2y=24

2y=24-42

2y=-18

y=-9

Step-by-step explanation:

If I have 41 red mechanical pencils and each pencil has 3 pieces of lead in it. How many pieces of lead are there in all

Answers

Answer: There are 123 pieces in total.

Step-by-step explanation: If you have forty-one pencils, and each has three pieces of lead, you multiple forty-one by three.

Total lead = 41 * 3

Total lead = 123 pieces

how can equations help you model the relationship between two quantities

Answers

Answer:

I dosent show anything that I should solve

Step-by-step explanation:

   

pattie spent 3/4 of her allowance on a backpack. If her allowance is $24, how much of her allowance is left after she purchased the backpack?

Answers

Answer:

she has 6 dollars left

Step-by-step explanation:

she spent $18 on the backpack

helpppp it’s dueee rnnnn

Answers

Answer:d and a

Step-by-step explanation:

Skye needs 50 g of sugar to make 30 biscuits.
She also needs
three times as much flour as sugar
two times as much butter as sugar
Skye is going to make 120 biscuits.
(a) Work out the amount of flour she needs.​

Answers

Answer:600g

Step-by-step explanation: 50x3=150 150x4=600 since 30x4=120

Omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. The company has 21 total cards in inventory. 14 of those cards are birthday cards. What is P(not a birthday card)​

Answers

Answer:

P = 7

Step-by-step explanation:

We have 21 total cards and out of those 21 cards, 14 of those are birthday cards. So that means that the amount of cards that are not birthday cards is the number of cards subtracted by the number of birthday cards, also shown as 21 - 14. So 21 - 14 = P, so now we solve what 21 - 14 is which is 7, so that means P = 7.

Let me know if you have any questions.

3(x-2)+7=2(x+5)
What is the answer to this please

Answers

Answer:

x=9

Step-by-step explanation:

distribute: 3x-6+7=2x+10

add like terms: 3x+1=2x+10

add the x's and the integers: x=9

Determine the measure of side d in the following diagram. Make sure that your answer is rounded to the nearest tenth.

Answers

Yo bro bro I’m going back on the road right after my car I’m down to

A team has won 51 out of 68 games. Explain how to
use the bar diagram to find the percent of games the
team has won

Answers

Answer:

you would divide -> 51/68  and you would get .75. move the 2 first numbers after the dot to the front and you get 75%

Step-by-step explanation:

Answer:Divide  51/68  and you would get .75. move the 2 first numbers after the dot to the front and you get 75%

Step-by-step explanation:

help me out
14 < n - 22​

Answers

Answer:

14+22=36

36 is less than n

Step-by-step explanation:

The answer is you n = 8

What is the total surface area of a cube with an edge on 4 1/2 feet

Answers

Answer:

What is the total surface area of a cube with an edge on 4 1/2 feet... 121.5 feet

Step-by-step explanation:

Surface area = 6 × 4 1/2 × 4 1/2

Surface area = 121.5

Point B, located at (-5, -8), is rotated 360°. What are the coordinates of point B?
O(-5, -8)
(5,8)
O (5,-8)
0 (-5,8)

Answers

(-5,-8)
The coordinates are still the same because a rotation of 360° is a complete circle, therefore the points remain in the same spot.
Number 1, or A. 360°

Susan reads a book at a rate of 1 page every 3 minutes. If her reading rate remains the same, which method could be used to determine the number of minutes for her to read 18 pages?

Answers

Multiply 3 by 18 and that is... 54 so it would take her 54 minutes to finish 18 pages, so basically the method that could be used is multiplying

Help! Will give brainliest!

Answers

Answer:

6 or 5

Step-by-step explanation:

The answer is 6 your welcome

Help ASAP!! I’m confised and need help. What is angle 1 in the picture called?? Thanks!!

Answers

Answer:

obtuse angle

Step-by-step explanation:

as it is angle 1 is greater than 90

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