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nikdorinn [45]
2 years ago
7

A chemist is using 381 milliliters of a solution of acid and water. If 12.2% of the solution is acid, how many milliliters of ac

id are there?
Mathematics
1 answer:
pantera1 [17]2 years ago
8 0

Answer:

46.482 ml

Step-by-step explanation:

381 x 12.2% =

381 x   .122 = 46.482

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A number is 3 1/3 greater than another. If the sum of the numbers are doubled the answer would be 19 1/2
Delicious77 [7]

Answer:

smaller number = 3 5/24

larger number =  6 13/24

Step-by-step explanation:

let the larger number = x

smaller number = y

x - y = 3 1/3 equation 1

2(x +y) = 191/2 equation 2

divide equation 2 through by 2

x + y = 9 3/4  equation 3

subtract equation 1 from 3

2y = 6 5/12

y = 77/12 x 1/2 = 3 5/24

substitute for y in equation 1

x - 3 5/24 = 31/3

x = 3 1/3 + 3 5/24

x = 6 13/24

5 0
2 years ago
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Elliott has some yarn that she wants to use to make hats and scarves. Each hat uses 0.2, point, 2 kilograms of yarn and each sca
sp2606 [1]

Answer:

Elliot will make 4 hats and 16 scarves

Step-by-step explanation:

Let x be the number of hats and y be the number of scarves Elliot will make.

Elliott wants to make a total of 20 items, then

x + y = 20

Each hat uses 0.2 kilograms of yarn, so x hats use 0.2x kilograms of yarn and each scarf uses 0.1 kilogram of yarn, then y scarves use 0.1y kilograms of yarn. Elliott wants to use twice as much yarn for scarves as for hats, then

0.1y = 2(0.2x)

Thus,

0.1y = 0.4x

y = 4x

Substitute it into the first equation:

x + 4x = 20

5x = 20

x = 4

y = 20 - 4

y = 16

Hence, Elliot will make 4 hats and 16 scarves

4 0
3 years ago
Find the explicit rule: 2, 6, 18, 54, 162
faust18 [17]
Multiply each number by 3.

2 (x 3) is 6. 6 x 3 is 18, 18 x 3 is 54, 54 x 3 is 162.

Hope this helps!
3 0
3 years ago
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Mr. franklin paid $33.20 for 8 gallons of gas. What is the price of 1 gallon ?
evablogger [386]
The price of 1 gallon is $4.15. You figure this out by dividing 33.20 by 8.
33.20/8 = 4.15
3 0
3 years ago
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Write a inequality phrase: you have to be at least 21 years of age
SVETLANKA909090 [29]

Answer:

a\geq 21

Step-by-step explanation:

"At least" is inclusive, so you can be 21 years old.

4 0
3 years ago
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