hepp I am being timeddd​

Answer:

linear pair.

Step-by-step explanation:

i know this because the angles are slightly. tilted unlike complementary and vertical angles.

hope this helps.

Starting with some solution of volume v and an alcohol concentration of 100c % , if you add 180 mL of 45% isopropyl to it, you get a mixture with a total volume of 180 mL + v.

Each mL of the starting solution contains c mL of alcohol. For example, if the concentration of the starting solution is 80% (so c = 0.8), then each mL contains 80% = 0.8 of one mL of alcohol.

Similarly, each mL of the added solution with 45% concentration contains 0.45 mL of alcohol.

You want the new solution to have a concentration of 70%, so that the ratio of the amount of alcohol in it to the total volume is 70%, meaning

cv + 0.45 (180 mL) = 0.7 (180 mL + v)

and you want to solve for v :

cv + 81 mL = 126 mL + 0.7v

cv - 0.7v = 126 mL - 81 mL

(c - 0.7) v = 45 mL

v = (45 mL) / (c - 0.7)

Judging by context clues, c lies somewhere between 0.7 and 1. (It can't be less than 0.7 because mixing this solution with any other solution of smaller concentration will never yield a solution of higher concentration.)

If, for example, c = 0.8, so that your starting solution is at 80% concentration, then you would need

v = (45 mL) / (0.8 - 0.7) = 450 mL

to be mixed with 180 mL of 45% solution to end up with 180 mL + 450 mL = 630 mL of 70% solution.

As another example, if you're mixing pure alcohol, so that c = 1, you would need

v = (45 mL) / (1 - 0.7) = 150 mL

to make a 180 mL + 150 mL = 330 mL batch of 70% solution. The fact that you would need less of a higher concentration solution is not surprising.

1) Always be polite and professional.

2) Specifically address the points that you disagree with.

3) Provide Evidence.

4) Close with a brief summary of your rebuttal.

Answer:

Although I believe ______, some may think that _______. However (evidence against their claim) shows that (explanation of evidence in 2-3 sentences)

Answer:

what is the question?

Step-by-step explanation:

i dont see it hehe

Answer:

What’s the point of teh question may be tell us what you need help with....?

Step-by-step explanation:

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[tex]( - 12 \div 3) \times 2 + 23 = [/tex]

[tex]( - 4) \times 2 + 23[/tex]

[tex] - 8 + 23 = [/tex]

[tex]23 - 3 - 5 = [/tex]

[tex]20 - 5 = 15[/tex]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

Answer:

17.04, 17.34, 17.7

Answer:

Im not sure but I think it is 172! I hope this helped!!

Step-by-step explanation:

Answer:

Step-by-step explanation:

if i new i would tell you but im haveing the same problem

Answer:

0 x 4 = 0 x 9

Step-by-step explanation:

Anything times 0 is 0 so they both equal 0

Answer: 1/2

Step-by-step explanation:

1 1/2 = 3/2

1/3 * 3/2 = 1/2

Answer:

1) 16

2) 35

3) 60 degrees

4) 72 degrees

5) (x+7)= 55 y= 70

Step-by-step explanation:

1) Special Triangle - All angles are 60 degrees, so that means all sides are the same length

2) You know that those two angles at the end are the same, so that means each of those side lengths are mirrored.

3) Special Triangle - Each side is the same, so all angles would be 60 degrees

4) You know that those two sides are the same, so their angles would be mirrored

5) You know that those two sides are the same, so their angles would be mirrored, to get 55 on both bottom sides. 55+55= 110 so, you'd need 70 degrees left to make it a triangle as all triangles are fully 180 degrees.

Answer:

The answer is A

Step-by-step explanation:

Answer:

0.25

Step-by-step explanation:

Answer:

0.0664

Step-by-step explanation:

divide the mass value by 1000

Answer:

55,000

Step-by-step explanation:

Look at 40 on the x-axis and the y-axis. The line is inbetween 50 and 60 so the best answer would be 55,000

Answer:

936mm^2

Step-by-step explanation:

Surface area of cuboid 20 mm 8mm 11mm

Surface area of the cuboid=2(20×8+8×11+11×20)

=2(160+88+×220)

=2(468)

=936mm^2

So the answer is936mm^2

Answer:

Density

Step-by-step explanation:

The gram per centimeter cubed is a unit of density in the CGS system, normally used in chemistry, defined as mass in grams divided by volume in cubic centimeters. The official SI symbols are g/cm3, g·cm−3, or g cm−3.

Answer:

21 cent per card

Step-by-step explanation:

5.25 / 25 = .21

because 25 can be divided into the first 2 numbers

Answer:

Step-by-step explanation:

-9x + 5 < 17

~Subtract 5 to both sides

-9x < 12

~Divide -9 to both sides

x < -4/3

13x + 25 < -1

~Subtract 25 to both sides

13x < -26

~Divide 13 to both sides

x < -2

Best of Luck!

Answer:

sol: here

side a=4cm

side b=6cm

vertical length=6 cm

1/2×(4+6)×6

30 cm^2

Answer:

ok so i think its 30 MARK AS BRANLIEST BCUZ I SAVED YOU

Step-by-step explanation:

area is 1/2x6x(4+6)

then it is 3(10)

=30

Answer:

6;2

Step-by-step explanation:

Answer:

1:3

Step-by-step explanation:

Answer:

1246

Step-by-step explanation:

jk get that work

Answer: y=1, x=11

Step-by-step explanation: make x in one side in an equation and substitute it in the other and get the value of y then substitute y in one of the equations and get the value of x

x= 8+3y

8+3y+6y=17

9y=9

y=1

X=11

Answer:

- 4/5

Step-by-step explanation:

Step 1:

- 11/15 - 1/15           Equation

Step 2:

- 12/15          Add the negative numbers

Step 3:

- 4/5         Convert

Answer:

- 4/5

Subtracting from a negative number is the same thing as adding them together.

Hope This Helps :)