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Lynna [10]
3 years ago
8

Which expression represents -8x2 + 54x + 140 in factored form?

Mathematics
1 answer:
ra1l [238]3 years ago
3 0

Answer:

-2(x+2)(4x-35)

Step-by-step explanation:

Factor out the 2 and by grouping.

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How many gallons of a 20% acid solution should be mixed with 30 gallons of a 40% solution, to obtain a mixture of 30% acid solut
Alexeev081 [22]

Answer:

30 gallons of 20% acid solution should be mixed.

Step-by-step explanation:

Let x gallons of a 20% acid solution was mixed with 30 gallons of a 40% solution, to obtain a mixture of 30% acid solution.

Therefore, final volume of the solution will be (x + 30) gallons.

Now concept to solve this question is

20%.(x) + 40%.(30) = 30%.(x + 30)

0.20(x) + 0.40(30) = 0.30(x + 30)

0.20x + 12 = 0.30x + 9

0.30x - 0.20x = 12 - 9

.10x = 3

x = \frac{3}{0.1}

x = 30 gallons

Therefore, 30 gallons of the 20% acid solution should be mixed.

4 0
3 years ago
What is the volume of the three dimensional solid?
meriva

Answer:

The volume would be 470

Step-by-step explanation:

First do the first half of the shape 8 times 4 times 10 and get 320

Second do the second half of the shape 3 times 5 times 10 and get 150

150 plus 320= 470

5 0
3 years ago
Read 2 more answers
Will 1/4 x 7/8 be larger or smaller than 1/4? Explain your answer.
sweet-ann [11.9K]
It will be smaller than 1/4.

The reason being that 7/8 is a fraction which is less than 1, and that it can only be greater than 1/4 when the multiplying number, is a number which is greater than 1.

Note: When  a positive number is multiplied by a number which is less than 1, it makes the positive number to be smaller and

When a positive number is multiplied by a number which is greater than 1, it makes the positive number to be bigger.

5 0
3 years ago
Read 2 more answers
Help me please 7th grade math
laiz [17]

Answer:

i also dont know

Step-by-step explanation:

im also in grade7 answering math

4 0
3 years ago
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What is the probability of drawing a 3 letter name? 2/10 or 1/5
uysha [10]
Hi
both are the same answers
if u divide 2/10
u will get 1/5
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5 0
3 years ago
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