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vredina [299]
3 years ago
8

Factor the expression 16a^2 -81

Mathematics
1 answer:
exis [7]3 years ago
5 0

According to short multiplication formula - different of squares:

a² − b² = (a − b)(a + b)

<h3>16a² - 81 = (4a)² - 9² = (4a - 9)(4a + 9)</h3>

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Marissa got 60% of the questions correct on her quiz out of 40 total questions. How many questions did she get wrong?
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Mehwish's temperature at 9:00 .. Was 97.2 ℉. At 4:00 .. Her temperature was risen to 99 ℉. By how many degrees did her temperatu
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Answer:

1.8° F

Step-by-step explanation:

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2 years ago
A particular brand of gasoline has a density of 0.737 g/ml at 25 ∘c. how many grams of this gasoline would fill a 13.4 gal tank
ruslelena [56]

Given, the density of a particular brand of gasoline = 0.737 g/ml.

13.4 gallon of tank given. We have to find the mass of gasoline to fill the tank.

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And 1 litre = 1000 ml

So we can write 1 gallon = (3.78541)(1000) ml = 3785.41 ml.

13.4 gallon = (3785.41)(13.4) ml = 50724.494 ml.

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To find x we will multiply both sides by 50724.494. we will get,

(0.737)(50724.494) =(\frac{x}{50724.494}) (50724.494)

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So we have got the required answer.

Mass of gasoline = 37383.95 grams.

5 0
3 years ago
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