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GuDViN [60]
3 years ago
14

Which expression is the best estimate of One-fourth times 31.3?

Mathematics
1 answer:
myrzilka [38]3 years ago
5 0

Answer:

One-fourth times 32

Step-by-step explanation:

Yes, I know...31.3 rounded is 31, not 32. But it's closer than any other number.

You might be interested in
Janis used the sum of cubes formula to factor 27x^3+8 Her answer is (3x+2)(9x^2-6x+2^2) Identify her error if any.
kicyunya [14]

Answer:

According to the sum of cubes formula, Janis is correct

Step-by-step explanation:

The sum of cubes formula is given as follows;

x³ + y³ = (x  + y)·(x² - x·y + y²)

The given expression is presented as follows;

27·x³ + 8

The given expression can be expressed as 27·x³ + 8 = (3·x)³ + 2³

Therefore, using the sum of cubes formula, we have;

(3·x)³ + 2³ = (3·x + 2)·((3·x)² - 3·x·2 + 2²) = (3·x + 2)·(9·x² - 6·x + 2²)

∴ 27·x³ + 8 = (3·x)³ + 2³ = (3·x + 2)·(9·x² - 6·x + 2²)

Therefore, Janis is correct, by the sum of cubes formula, we get;

27·x³ + 8 = (3·x + 2)·(9·x² - 6·x + 2²).

5 0
3 years ago
Solve 5.4 = n/-0.9<br><br> Answers:<br> a. -4.86<br> b. -48.6<br> c. 48.6<br> d. 4.86
ZanzabumX [31]

Answer: 4.86

Step-by-step explanation: Since <em>n</em> is being divide by 0.9, to get <em>n</em> by itself, we need to multiply by 0.9 on both sides of the equation.

On the right side of the equation, the 0.9's cancel and we have <em>n</em>. On the left side of the equation, we have 0.9 × 5.4 which is 4.86.

Therefore, 4.86 = n.

8 0
3 years ago
Read 2 more answers
Which of the following is equivalent to  (3x-1)(5x+4) ? Select all that apply.
Snowcat [4.5K]
The answer is 15x^2+7x-4

because:

1) 15x^2+12x-5x-4
2) 15x^2+7x-4
8 0
3 years ago
The sum of two numbers is 125. Their difference is 47. The two numbers are:
makvit [3.9K]

Answer:

let x represent the bigger number

x+x-47=125

2x-47=125

2x=125+47

2x=172

2x/2=172/2

x=86

the smaller number=x-47

86-47

39

therefore the answer is a) 39 and 86

7 0
3 years ago
Read 2 more answers
What is 8 feet to 10 feet in percent of change
max2010maxim [7]
10 feet is \frac{10}{8} or 1.25% of 8 feet.

8 0
3 years ago
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