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Greeley [361]
3 years ago
8

how many grams of a 15 percent alcohol solution should be mixed with 40 grams of a 30 percent solution to obtain a solution that

is 25 percent alcohol
Mathematics
1 answer:
quester [9]3 years ago
8 0
According to my calculations it should be 77
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Sally is planning a trip for 225 students
Gala2k [10]

Answer: 75 students.

Step-by-step explanation:

In the data set we have a total of 10 + 8 + 7 + 5 = 30 students.

of those, 10 want to go to the park, the percentage is:

(10/30)*100% = 33.3%

Then, out of the 225, we can expect that a 33.3% (or 0.333 in decimal form) want to go to the park, this is:

N = 225*0.333% = 74.925

We can roud it up, and get N = 75

So Sally can expect that 75 students want to go to the park

4 0
3 years ago
9. Write an equation parallel to y = 2x + 4that<br> passes through the point (-4,-1).
sasho [114]

Answer:y=2x+7

Step-by-step explanation:

so for the new equation, we know the slope is going to be the same (because its parallel) so for starters we have y=2x+b so now in order to find b (the y-intercept) we have to plug the point into the equation. So it would look like -1=2(-4)+b and then you solve for b and get 7 for b. SO the final answer is y=2x+7.

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3 years ago
Some body help homework due tomorrow!​
34kurt

Answer:

No; she cannot

Step-by-step explanation:

3/4 is equal to 6/8

6/8 + 3/8= 9/8

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