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Orlov [11]
3 years ago
12

How many milliliters of a 5% bleach solution must be mixed with a 10% bleach solution to produce 900 mL of a 7% bleach solution

Mathematics
1 answer:
boyakko [2]3 years ago
5 0

Answer:

Step-by-step explanation:

If we use x ml of 2% bleach, then we use (600-x) ml of 20% solution.

Looking at the bleach concentrations:

.02x + .20(600-x) = .05(600)

Multiply through by 100 to clear the decimals

2x + 20(600-x) = 5(600)

2x + 12000 - 20x = 3000

-18x = 3000 - 12000

-18x = -9000

x = 500 ml of 2% bleach

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Assume you have sea water that weighs 64 lb/ft³ and contains 35 parts per thousand (0.0035) dissolved salt by weight. How many c
zlopas [31]

Answer:

558.036 lb

Step-by-step explanation:

Let x is the amount of the sea water to collect 125 lb of sea salt

As given: 64 lb/ft³ has 0.0035 dissolved salt by weight

So the formula to find out the amount of the sea water is:

64 lb/ft³ * 0.0035 *x ft³  = 125 lb

<=> x = \frac{125}{64*0.035} = 558.036 lb

Hope it will find you well.

7 0
3 years ago
Triangles triangle ABC and triangle DEF are similar. Find the angles of these triangles if Mesurements of angle A=100 degrees, a
beks73 [17]

Answer:

<D = 100

<E =30

<F =50

Step-by-step explanation

Given that triangles triangle ABC and triangle DEF are similar, this means that their angles are congruent i.e

<A = <D

<B = <E

<C = <F

Given

<A = 100 then <D = 100

<B = 30°, then <E = 30°

To get <F, we will use the expression

<D+<E+<F = 180 (sum of angles in a triangle is 180°)

100+30+<F = 180

130+<F = 180

<F = 180-130

<F = 50°

Hence the measure of <F is 50°

3 0
2 years ago
Marcia made spiral books to sell at her local craft fair. She forgot to count how many she made before the fair. She knows that
Alex787 [66]

Answer:

B) 0.60n+1.48n = 176.80

Step-by-step explanation:

0.60 for every spiral wire per book = 0.60*n

0.74 per chipboard cover, 2 needed for each book = 1.48 per book = 1.48*n

Put it together: 0.60n+1.48n = 176.80

5 0
2 years ago
Help please!! The measures of the angles of a triangle are shown in the figure below. solve for x
tatiyna

9514 1404 393

Answer:

  x = 33

Step-by-step explanation:

The angles are complementary.

  x° = 90° -57°

  x = 33

3 0
2 years ago
What is 2+2? and multiply the answer by 954. im having a hard time with this
Alex787 [66]

Answer:

2+2= 4 4x954= 3816

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
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