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Pavel [41]
2 years ago
11

For the function x^2+8x+7 evaluate f(4)

Mathematics
1 answer:
taurus [48]2 years ago
4 0

Answer:

I think you would have to plug in 4 as X so it would be 4^2 +8(4)+ 7

that would be 16+ 32 +7 and that would equal 55

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Bruelle exercises for 3/4 hours each day for 6 days in a row altogether how many hours does she exercise during the six days
Mandarinka [93]

Answer:

18-24 hours

Step-by-step explanation:

8 0
3 years ago
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A pitcher can throw at a speed of 30 miles per hour. If the pitcher is 60.5 feet from home plate, how many full seconds would it
liubo4ka [24]

Answer:

1.375 seconds

Step-by-step explanation:

One mile is equivalent to 5280 feet.  Throwing at 30 miles an hour is 0.5 miles each minute, or one mile every 120 seconds(Unfortunately for the pitcher, I don't think the ball would make it to home plate). That means it travels 1/120 miles each second, or 44 feet(5280/120). The ball will reach home plate in 1.375 seconds(60.5/44).

4 0
2 years ago
Sally's balance on her credit card is $75.00 on the first day of august. she makes a payment of $18.00 on august 17 and
Travka [436]

The average daily balance for the month was $84.21, and the finance charge for the month was $30.13.

<h3><u>Averages</u></h3>

Given that Sally's balance on her credit card is $75.00 on the first day of August, and she makes a payment of $18.00 on August 17 and a new purchase of $41.00 on August 29, and the annual interest rate is 21.25%, to determine what is Sally's average daily balance and finance charge for the month of August, the following calculation must be made:

  • 75 x ((21.15/12 x 16) / 100) + 75 = A = 86.89
  • 57 x ((21.15/12 x 13) / 100) + 57 = B = 70.06
  • 98 x ((21.15/12 x 3) / 100) + 98 = C = 103.18
  • (86.89 x 16 + 70.06 x 13 + 103.18 x 3) / 31 = X
  • 84.21 = X
  • 86.89 + 70.06 + 103.18 - 75 - 57 - 98 = Y
  • 30.13 = Y

Therefore, the average daily balance for the month was $84.21, and the finance charge for the month was $30.13.

Learn more about averages in brainly.com/question/23455102

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6 0
1 year ago
A sample with a mean of m = 40 and a variance of s2 = 20 has an estimated standard error of 1 point. how many scores are in the
tamaranim1 [39]

The correct option is 20.

The score found for the sample is 20.

<h3>What is Standard error?</h3>

A standard error is a statistic that is applied to test the distribution of data. This metric is comparable to standard deviation. We can calculate the standard error if we know the sample size & standard deviation. It assesses the mean's precision.

Now, according to the question;

Sample mean; \bar{x}=40

Sample variance; s^{2}=20

Thus, s=\sqrt{20}=4.47

Standard error SE = 1

The amount of scores with in sample must be determined here.

The standard error formula is as follows:

S E=\frac{s}{\sqrt{n}}

We might rearrange the formula as follows:

\begin{aligned}\sqrt{n} &=\frac{s}{S E} \\n &=\left(\frac{s}{S E}\right)^{2}\end{aligned}

Substituting the values;

\begin{aligned}&n=\left(\frac{4.47}{1}\right)^{2} \\&n=19.98\end{aligned}

The sample's number of scores n = 19.98 = 20 (round up)

Therefore, the scores are in the sample is 20.

To know more about the Standard error, here

brainly.com/question/14467769

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3 0
1 year ago
joel has 24 sports trophies. of the trophies, 1/8 are soccer trophies. how many soccer trophies does joel have?
hichkok12 [17]

Answer:

3 soccer trophies does Joel have

Step-by-step explanation:

As per the statement:

Joel has 24 sports trophies.

⇒Total sport trophies Joel have= 24

It is also given: of the trophies, 1/8 are soccer trophies

We have to find how many soccer trophies does Joel have.

\text{Joel have soccer trophies} =\frac{1}{8} \cdot 24

Simplify:

\text{Joel have soccer trophies} =3

Therefore, 3 soccer trophies does Joel have

3 0
3 years ago
Read 2 more answers
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