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Aneli [31]
3 years ago
7

How many quarts of pure antifreeze must be added to 5 quarts of a 10 ​% antifreeze solution to obtain a 20 ​% antifreeze​ soluti

on?
Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0
Hey let’s be friends
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A game involves spining this spinner. what is the probality that the pointer will land on g?
Doss [256]
There's a 1 in 7 chance it will land on G.
6 0
3 years ago
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What is k in this question<br> k/1.5 = 3
Reptile [31]

Answer:k equals 4.5

Step-by-step explanation: you multiply 1.5 times three

3 0
3 years ago
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PLEASE HELP &lt;3
quester [9]

Answer:

-403/40

or

-10 3/40

or

-10.075

3 0
3 years ago
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HELP!!!!!!!! Select an expression that id equivalent to 4squareroot of 2x^2 • 4squareroot of 2x^3
earnstyle [38]

Answer:

B

Step-by-step explanation:

\sqrt[4]{2x^2} *\sqrt[4]{2x^3} =(2x^2)^{1/4}*(2x^3)^{1/4}\\= 2^{1/4}*(x^2)^{1/4} *2^{1/4} * (x^3)^{1/4}\\

combine like terms

= 2^{2/4} *x^{2/4}*x^{3/4}\\= 2^{2/4} * x^{5/4}

these steps use exponent laws

a few key ones i used:

(x^y^z) = x^(y*z)

x^y * x^z = x^(y+z)

let me know if you have any questions!

8 0
2 years ago
A market research company wishes to know how many energy drinks adults drink each week. They want to construct a 80% confidence
Diano4ka-milaya [45]

Answer:

The confidence interval = (7.8 , 8.0)

Step-by-step explanation:

Confidence Interval formula =

Mean ± z × Standard deviation/√n

Mean = 7.9

Standard deviation = 0.9

n = number of samples = 164

z = z score of an 80% confidence interval = 1.282

Confidence Interval = 7.9 ± 1.282 × 0.9/√164

= 7.9 ± 0.0900966432

Confidence Interval

= 7.9 - 0.0900966432

= 7.8099033568

Approximately to 1 decimal place = 7.8

7.9 + 0.0900966432

= 7.9900966432

Approximately to 1 decimal place = 8.0

Therefore, the confidence interval = (7.8 , 8.0)

7 0
3 years ago
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