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notka56 [123]
3 years ago
11

Factor the expression 4r^2 - 64

Mathematics
2 answers:
elena55 [62]3 years ago
7 0

For this case we must factor the following expression:

4r ^ 2-64

We take common factor 4:

4 (r ^ 2-16)

We factor the expression within the parenthesis:

4 [(r-4) (r + 4)]

Finally we have that the factored expression is:

4 [(r-4) (r + 4)]

Answer:

4 [(r-4) (r + 4)]

Shkiper50 [21]3 years ago
5 0

Answer:

4(r+4)(r-4)

Step-by-step explanation:

If you factor it out, then it will be 4(r+4)(r-4). You can double check by multiplying it.

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3 years ago
Elena went on a 6-mile walk. She completed the first half of the walk 1 mi/h faster than usual and the second half of the walk 2
xxTIMURxx [149]

Answer:

Her usual rate is 0.8333 miles per hour.

Step-by-step explanation:

The velocity formula is given by:

v = \frac{d}{t}

In which d is the distance and t is the time.

She completed the first half of the walk 1 mi/h faster than usual

Her usual rate is v. 1mph faster is v + 1.

The second half of the walk 2 mi/h slower than the first half.

The first half is v + 1.

2mph slower is v + 1 - 2 = v - 1. Then

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7.2 hours, and 6 miles. So

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0.5(v + 1) + 0.5(v - 1) = \frac{6}{7.2}

0.5v + 0.5 + 0.5v - 0.5 = 0.8333

v = 0.8333

Her usual rate is 0.8333 miles per hour.

8 0
3 years ago
A group of 7 friends each received 5/6 of a pound of candy. How much candy did they receive total?
Vedmedyk [2.9K]

Answer:

A group of seven friends each received one-half of a pound ofcandy. How much candy did they receive total?✓

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2 years ago
Please help me with this please and thank you
Alina [70]

Step-by-step explanation:

y = ax^n + bx^(n-1) ... + z

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because x = 0 eliminates all other terms. and as the sum is 1, that means z = 1.

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(-1, 3) : 2×(-1)² + 1 = 2×1 + 1 = 3

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so, the fitting equation is

y = 2x² + 1

3 0
2 years ago
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