What is StartFraction 7 Over 9 EndFraction divided by one-third?

Mathematics

2 answers:

nordsb [41]3 years ago

6 0

Answer:

D, two and one third

Step-by-step explanation:

i used a calculator

Savatey [412]3 years ago

5 0

The correct answer is D

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Sandra needs to make 500 L hand sanitizer with 75% alcoholic solution. He has only two of the alcoholic solutions available, a 6

shtirl [24]

If Sandra mixes x L of 65% solution with y L of 90% solution, then the resulting mixture has a total volume of

x + y = 500

litres, and it contains

0.65x + 0.90y = 0.75 (500) = 375

litres of alcohol.

Solve the first equation for y :

y = 500 - x

Substitute this into the second equation and solve for x :

0.65x + 0.90 (500 - x) = 375

0.65x + 450 - 0.90x = 375

75 = 0.25x

x = 300

Solve for y :

y = 500 - 300

y = 200

So, Sandra should mix 300 L of 65% solution with 200 L of 90% solution.

8 0

3 years ago

Which equation are true for x=-2 and x=2 check all that apply

ki77a [65]

1 it is true
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2 it's not true
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3 it's not true
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4 it's true
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5- it's true
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