A chemistry teacher needs to mix a 40%

1 answer:

8 0

Let f and e represent the amount of 40% and 80% solutions used...

We are told the f+e=20 which means that f=20-e and we can say that:

(.4f+.8e)/20=.7, using f=20-e in this equation we see that:

.4(20-e)+.8e=14

8-.4e+.8e=14

8+.4e=14

.4e=6

e=15, and since f=20-e then

f=5

So 15 quarts of 80% solution is mixed with 5 quarts of 40% solution to produce a 20 quart mixture of 70% solution.

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A video game sets the points needed to reach the next level based on the function g(x) = 10(2)x − 1, where x is the current leve

Len [333]

Answer:

The correct option is C.

Step-by-step explanation:

The given functions are

$g(x)=10(2)^{x-1}$

$h(x)=2x$

It is given that the point needed for next level is defined by the function g(x) and hardest setting promises to multiply the points needed in each level according to the function h(x) .

The total points will a player need on the hardest setting of level 5 are

$g(5)\times h(5)=10(2)^{5-1}\times 2(5)$

$g(5)\times h(5)=10(2)^4\times 10$

$g(5)\times h(5)=10(16)\times 10$

$g(5)\times h(5)=160\times 10$

$g(5)\times h(5)=1600$

Therefore the total points will a player need on the hardest setting of level 5 are 1600 and option C is correct.

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4 years ago

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Help asap thank you

Alex777 [14]

1. The answer is $24
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3 years ago

Simplify the expression:<br> 4n + 7 +6

Elan Coil [88]

Answer:

4n+13

Step-by-step explanation:

combine like terms.

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3 years ago

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