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2 years ago

Which algebraic expression represents the phrase "four times a number"?

Mathematics

1 answer:

Mademuasel [1]2 years ago

4 0

Answer:

4. 4c

Step-by-step explanation:

hope this helps

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A box contains 3 black pens, 7 blue pens, and 5 red pens. She pulls a red pen, puts it back, pulls a blue pen, puts it back, and

saveliy_v [14]

Answer:

7/25

Step-by-step explanation:

Probability is the likelihood or chance that an event will occur.

Probability = expected outcome/total outcome

If the box contains 3 black pens, 7 blue pens, and 5 red pens, the total number of pens in the box is 3+7+5 = 15pens

Probability of pulling a red pen and replacing = 5/15 = 1/3

Probability of pulling a blue pen and replacing = 7/15

Probability of pulling a black pen and not replacing(using it) = 3/15

{Note that the total number of outcome used will still be 15 since the black pen was pulled out last even though it wasn't replaced.}

P(red, then blue, then black) = 1/3×7/15×3/15

= 63/225

= 7/25

4 0

3 years ago

What is the greatest common factor of 15 and 30

storchak [24]

It is 15 because it goes into both numbers

5 0

3 years ago

What is the solution to 2x^+8x=x^-16

malfutka [58]

Answer:

If you are solving for x then the answer is x= -4

Step-by-step explanation:

8 0

3 years ago

04-7-62-3<br> What is the answer

Deffense [45]

Answer:

if my calculations are correct the answer is -68

7 0

3 years ago

A leading bank is coming up with an investment that pays 8 percent interest compounded semiannually. What is the investment's ef

uranmaximum [27]

The effective rate is calculated in the following way:
$r = {(1 + \frac{i}{n} )}^{n} - 1$
where r is the effective annual rate, i the interest rate, and n the number of compounding periods per year (for example, 12 for monthly compounding).
our compounding period is 2 since the bank pays us semiannually(two times per year) and our interest rate is 8%
so lets plug in numbers:
$r = {(1 + \frac{8\%}{2}) }^{2} - 1 \\ r = {(1 + \frac{1}{25}) }^{2} - 1 \\ r = \frac{676}{625} - 1 \\ r = 0.0816 \: or \: 8.16\%$

5 0

3 years ago