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Mrrafil [7]
2 years ago
7

A 7-gallon mixture contains 45% acid.A 5 gallon mixture contains 30% acid.What percent acid is obtained by putting the two mixtu

res together, please answer ASAP
Mathematics
2 answers:
NNADVOKAT [17]2 years ago
8 0

Answer:

(5/8)40 + (3/8)50 = 25 + 18.75 = 43.75%

Step-by-step explanation:

This is the answer

irina [24]2 years ago
3 0

Answer:

4.65 gallons of acid

Step-by-step explanation:

30% of 5 gallons is 1.5 gal

45% of 7 gallons is 3.15 gal

4.65 gal of acid

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Y_Kistochka [10]
You can use the Pythagorean theorem to answer this. The diagonal is the hypotenuse of the right triangle that is formed. So, your equation will look like (h is height):
34^2+h^2 = 39^2

We have to solve for h:
h^2 = 39^2-34^2
h =  \sqrt{39^2-34^2}

You can plug it into a calculator, and you get approximately 19.105. The answer closest to that is B. So, that's your answer! Hope it helps. If anything doesn't make sense, hmu!
5 0
3 years ago
⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ b(1)=−2 b(n)=b(n−1)−7 ​ Find the 3 rd 3 rd 3, start superscript, start text, r, d, end text, end superscript ter
vitfil [10]

Answer:

-16

Step-by-step explanation:

Given the sequence:

b(n)=b(n−1)−7, where b(1)=−2

b(2)=b(2−1)−7

=b(1)−7

=-2-7

b(2)=-9

Therefore, the 3rd term of the sequence

b(3)=b(3−1)−7

=b(2)-7   (Recall b(2)=-9 from above)

=-9-7

b(3)=-16

The 3rd term of the sequence is -16.

5 0
3 years ago
At the local burger restaurant, you can get 4 value meals for $21.88. How much is each value meal?
Sidana [21]
If thats without tax its about 5.47
6 0
2 years ago
Read 2 more answers
Is the equation y=9x linear
ludmilkaskok [199]

Answer:

Linear

Step-by-step explanation:

A linear equation is an equation of a straight line, which means that the degree of a linear equation must be  0  or  1  for each of its variables. In this case, the degree of variable  y  is  1  and the degree of variable  x  is  1 .

Linear

4 0
2 years ago
Read 2 more answers
Can you please help me fill this out thanks
RoseWind [281]
For perimeter you just add the sides up, so 15+12+9 which = 36
7 0
3 years ago
Read 2 more answers
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