HELP!!! A scientist needs 10 litters of 20% acid solution for an experiment, but she has only a 5% solution and a 40% solution. To the nearest tenth of a liter, about how many liters of the 5% and the 40% solutions should she mix to get the solution she needs

Answers

Answer 1

Answer:10 liter * 20%= x liter*40% + (10- x) liter*5%

10l * 20%= x liter * 35% + 10 liter*5%

x liter *35 = 10l * 20 - 10l *5= 10l*15

x liter = 10l *15/35= 4.28 L= 4.3L

The volume of 40% solution= 4.3L

The volume of 5% solution= 10L- 4.3L= 5.7L

Step-by-step explanation:

In this question, you want to make 10 liters 20% concentration solution by mixing 5% and 40% concentration. There should be multiple answers to this question. Assuming that the total volume of 5% and 40% solution equal to 10L(no solution wasted), then you can determine the volume of solution needed. The formula should be:


Related Questions

Solve each equation: -5(7-8x)-7x=-(3x+1)

Answers

Answer:

Step-by-step explanation:

1.5 times 3 in a decimal

Answers

Answer:

4.5

Step-by-step explanation:

4x - 7y = -40
3x - 2y = -4

Answers

Heres your answer: x=4,y=8

8 because it makes the most sense for the particular question

Coach Rivas can spend up to $750 on 30 swimsuits for the swim team. The inequality shown can be used to find the maximum amount in dollars she can spend on each swimsuit. 30p≤750 which inequality represents all the possible values of p,the amount of money in dollars coach Rivas can spend on each swimsuit​

Answers

Answer:

$0 < p ≤ $25

Step-by-step explanation:

We know that coach Rivas can spend up to $750 on 30 swimsuits.

This means that the maximum cost that the coach can afford to pay is $750, then if the cost for the 30 swimsuits is C, we have the inequality:

C ≤ $750

Now, if each swimsuit costs p, then 30 of them costs 30 times p, then the cost of the swimsuits is:

C = 30*p

Then we have the inequality:

30*p ≤ $750.

To find the possible values of p, we just need to isolate p in one side of the inequality.

So we can divide both sides by 30 to get:

(30*p)/30 ≤ $750/30

p ≤ $25

And we also should add the restriction:

$0 < p ≤ $25

Because a swimsuit can not cost 0 dollars or less than that.

Then the inequality that represents the possible values of p is:

$0 < p ≤ $25

hi please help i’ll give brainliest

Answers

Distributive property
(7 * 4y) + (7*9) = 28y + 63
The correct answer is 28y+63

A pack of 8 batteries costs £4.99.
How much does each battery cost?
Give your answer to the nearest penny.

Answers

Answer:

0.62

Step-by-step explanation:

4.99/8=0.62

Kala deposits $7000 into an account that pays simple Interest at a rate of 4% per year How much interest will she be paid in the first 4 years?

Answers

Kala want get paid $1120 in the four years

A tank contains 550 gallons of water. When the valve is opened, the tank drains at a rate of 12 gallons per minute. Which function shows the relationship between the time t the valve is opened and the amount of water in the tank?

Answers

Answer:

y= 550-12x

Step-by-step explanation:

Given data

Content of tank= 550 gallons

Rate of drain= 12gallon per minute

let the time it will take to drain all 550 gallons be x minutes

Hence the expression for amount of water in the tank after x minutes will be

y= 550-12x

Can someone help me find the mistake!!!!!

Answers

Answer:

She supposedly multiplies 4*4*16*-3y but distributes it correctly as if she put (16*4)+(4*-3y) which equals 64-12y.

The work shown is a mistake, the answer of y=5 isn't.

what’s the slope for this graph ??

Answers

Answer:

M = 0

Step-by-step explanation:

Straight line is always slope of 0

Answer:

Step-by-step explanation:

Slope is defined as

m=(y2-y1)/(x2-x1) in this case

m=(5-5)/(5- -5)

m=0/10

m=0

This is a horizontal line, y=5, with a slope of zero.

Find the percent of change. Round to the nearest tenth of a percent if necessary.

Answers

Answer:

What’s the percent Lol

Step-by-step explanation:

How do i get my grade up in algebra 1 honors? i am in middle school taking the class early and i dont wanna fail​

Answers

Answer:

just do the assignments get help when neccesary ask the teacers if they have any extra credit materials

Step-by-step explanation:

if they have tutoring there you should totally go to it. Redo bad assignments for better grades and pay attention. Also if you take notes make sure you add stuff to help you remember

Which of the following is equivalent to the addition problem below?

46.61 + 51.52
A.
(40 + 50) + (6 + 1) + (0.6 + 0.5) + (0.01 + 0.02)
B.
(40 + 50) + (6 + 5) + (0.6 + 0.1) + (0.01 + 0.02)
C.
(40 + 10) + (6 + 5) + (0.6 + 0.5) + (0.01 + 0.02)
D.
(40 + 50) + (6 + 1) + (0.6 + 0.1) + (0.05 + 0.02)

Answers

Ok I am fine I am now in

Answer:

A) (40 + 50) + (6 + 1) + (0.6 + 0.5) + (0.01 + 0.02)

Step-by-step explanation:

In this case, you are breaking each term down to it's non-zero digits, and adding them:

46.61 = 40 + 6 + 0.6 + 0.01

51.52 = 50 + 1 + 0.5 + 0.02

Note however, that the answer choices add each individual non-zero terms together:

(40 + 50) + (6 + 1) + (0.6 + 0.5) + (0.01 + 0.02), or A)

A) (40 + 50) + (6 + 1) + (0.6 + 0.5) + (0.01 + 0.02) is your answer.

~

What's the value of
[tex] \sqrt{3 \times 3} [/tex]

Answers

Answer:

3.

Step-by-step explanation:

Square root is the opposite of power. Simplify:

[tex]\sqrt{3 * 3 } = \sqrt{3^2} = 3[/tex]

3 is your answer.

~

Answer:

√{3×3}=√3²=±3 is your answer

Nicole makes $6.25 an hour babysitting. How much money will Nicole earn if she works 12 hours?

Answers

Answer:

$75

Step-by-step explanation:

Nicole makes $75 in 12 hours.

I hope this helped, if you have any other questions you may ask me.

HELP ASAP WILL MARK BRAINLIEST

Answers

Answer:

1.

A- about 43.98

B- about 17.59

C- 32.99

Step-by-step explanation:

Answer:

1) 43.98

2) 17.59

3) 32.99

Step-by-step explanation:

hopefully they’re all right

if jaylee's snow cone maker can make 800 cubic inches of ice, how many snow cones can she make with the dimensions show below?

Answers

What dimensions shown below?

A quadrilateral must be a parallelogram if two the opposite sides are 1. Congruent only 2. Parallel only 3. Congruent and parallel 4 parallel and the other two sides are congruent

Answers

Answer:

what’s the question

Step-by-step explanation:

1. Opposite Sides Theorem Converse: If both pairs of opposite sides of a quadrilateral are congruent, then the figure is a parallelogram. 2. Opposite Angles Theorem Converse: If both pairs of opposite angles of a quadrilateral are congruent, then the figure is a parallelogram.

Will give brainliest to whoever figures this out :(

Answers

Step-by-step explanation:

I think it's 8.9932×10⁶

Answer:

8,993,200

Step-by-step explanation:

10^3 is 1000

8993.2 * 1000

=

8,993,200

Which ratios correctly compare bananas to apples, as shown in the picture ( 6 apples in a circle and 1 banana in the center ) check all that apply.... Pls help

Answers

Answer:

6:1

Step-by-step explanation:

There are 6 apples t o1 banana

(This is all i can do would have been easier with picture)

7m – 3m – 6 < 6 Solve each inequality and graph the solution.

Answers

Answer:

3

Step-by-step explanation:

Step-by-step explanation:

7m - 3m - 6 < 6

4m - 6 - 6 < 0

4m - 12 < 0

4m < 12

m < 12 ÷ 4

m < 3

LCM of the following 5,8,4​

Answers

Answer:

40

Step-by-step explanation:

5 x 8 = 40

8 x 5 = 40

4 x 10 = 40

Answer:

40

Step-by-step explanation:

5: 5, 10, 15, 20, 25, 30, 35, 40

8: 8, 16, 24, 32, 40

4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

A greeting card cost four dollars before tax. A customer has a 15% discount. Then the 5% sales tax is added. How much will the customer pay for the card?

Answers

Given:

Greeting card cost before tax = $4

Discount = 15%

Sales tax = 5%

To find:

How much will the customer pay for the card?

Solution:

It is given that the cost of the greeting card before tax is $4.

After 15% discount, the cost of the greeting card is:

Cost of card after discount [tex]=4-\dfrac{15}{100}\times {4}[/tex]

                                             [tex]=4-0.6[/tex]

                                             [tex]=3.4[/tex]

The cost of card after 5% sales tax is:

Cost of card after tax [tex]=3.4+\dfrac{5}{100}\times 3.4[/tex]

                                    [tex]=3.4+0.17[/tex]

                                    [tex]=3.57[/tex]

Therefore, the customer will pay $3.57 for the greeting card.


[tex]25x |2| - 16 \: \\[/tex]

Answers

Answer:

Step-by-step explanation:

a² - b² = (a +b)(a - b)

[tex]5x^{2} - 16 = 5^{2}x^{2} - 4^{2} \\\\= (5x)^{2}-4^{2}\\\\=(5x + 4)(5x - 4)[/tex]

I’m confused on this question

Answers

Answer:

percent will be

65÷90×100

which the answer will be

72.2%

Step-by-step explanation:

hope it helps

Last week, Russell bought 8 pizzas and 10 cakes for a total of $160.
Today, Russell bought 26 pizzas and 8 cakes for a total of $226.
Assuming neither item has changed in price, what is the cost of a pizza in dollars?

Answers

Answer:

$5

Step-by-step explanation:

Create a system of equations where p is the cost of a pizza and c is the cost of a cake

8p + 10c = 160

26p + 8c = 226

Solve by elimination by multiplying the top equation by -4, and the bottom equation by 5

-32p - 40c = -640

130p + 40c = 1130

Add these together:

98p = 490

p = 5

So, the cost of a pizza is $5

Find the find the area and the circumference of the circle round your answer to the nearest hundredth ​

Answers

Area = pi * r^2
Area = pi * 12^2 = 452.39 square units
Circumference = 2(pi) * r
2 * pi * 12 = 75.40 units

Answer:

area =  452.39 square units

circumference = 75.40 square units

Step-by-step explanation:

area = [tex]\pi r^{2}[/tex]

r = 12

452.389

circumference = [tex]\pi *d[/tex]

d = 2r

r = 12

d = 24

75.398

plz help simplify 8/10​

Answers

[tex]\frac{8}{10}[/tex] → [tex]\frac{4}{5}[/tex]

8 and 10 can both be divided by 2. So, 8 ÷ 2 is 4 and 10 ÷ 2 is 5.

Hope this helps :)

Answer:

4/5

Step-by-step explanation:

okay so to simplify, we first need to find the GCF of 8 and 10. The GCF of 8 and 10 would be 2. We now divide both 8 and 10 by 2. That will give us 4/5.

[tex]\frac{8}{10}[/tex]÷[tex]\frac{2}{2}[/tex]=[tex]\frac{4}{5}[/tex]

change the following to algebraic expressions

nine times a number decreased by 11​

Answers

X^9 - 11

Step-by-step explanation:

let the number be X

so,

X^9 - 11

Answer: the answer is -4

PLEASE HELP QUICKLY!!!!!! ILL GIVE BRAINLIEST


Which equation could be solved using this application of the quadratic formula?

Answers

Answer:

Step-by-step explanation:

A.)  x² + 1 = 2x − 3   Make the equation into ax² + bx + c = 0. Subtract 2x on both sides, and add 3 on both sides to set the equation equal to 0

x² + 1 - 2x + 3 = 2x - 2x - 3 + 3

x² - 2x + 4 = 0      

a = 1

b = -2

c = 4    This is not the answer because b = 2 not -2, and c = -4 not 4

B.) x² - 2x − 1 = 3     Subtract 3 on both sides to set the equation = 0

x² - 2x - 4 = 0

a = 1

b = -2

c = -4      This is not the answer because b = 2 not -2

C. x² + 2x - 1 = 3    Subtract 3 on both sides to set the equation = 0

x² + 2x - 4 = 0

a = 1

b = 2

c = -4    This is your answer

D. x² + 2x - 1 = -3      Add 3 on both sides to set the equation = 0

x² + 2x + 2 = 0

a = 1

b = 2

c = 2       This is not the answer because c = -4 not 2

Hope this helps       :)

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