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lianna [129]
3 years ago
9

A track team has 64 members. There are 18 more boys than girls on the team. How many girls are on the track team?

Mathematics
1 answer:
AlekseyPX3 years ago
3 0

Answer:

23

Step-by-step explanation:

64 divided by 2 = 32

(32 - 9)=23

(32+9)= 41

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The equation below describes a parabola of a is positive which way does the parabola open? X=ay2
inessss [21]

Answer:

If a is positive, the parabola will open to the right, so the answer is C

Step-by-step explanation:

5 0
3 years ago
Given the function defined in the table below, find the average rate of change, in
sertanlavr [38]

Answer:

ROC= -3

Step-by-step explanation:

X    f(x)

0   59

3   58

6   57

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ROC= change in y/change in x

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The rate of change is -3

8 0
2 years ago
In a random sample of 7 residents of the state of Maine, the mean waste recycled per person per day was 1.4 pounds with a standa
ivolga24 [154]

Answer:

a) The 95% confidence interval for the mean waste recycled per person per day for the population of Maine is between 1.19 and 1.61 pounds.

b) T_c = 2.4469

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 7 - 1 = 6

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 6 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.4469, and the answer to question b is T_c = 2.4469

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.4469\frac{0.23}{\sqrt{7}} = 0.21

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 1.4 - 0.21 = 1.19 pounds.

The upper end of the interval is the sample mean added to M. So it is 1.4 + 0.21 = 1.61 pounds.

The 95% confidence interval for the mean waste recycled per person per day for the population of Maine is between 1.19 and 1.61 pounds.

7 0
2 years ago
PLEASE HELP THIS WILL GIVE 50 POINT AND BRAINLIEST!!!!!!
KatRina [158]

Answer:

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Step-by-step explanation:

4 0
2 years ago
4b-4=3 b+3 What’s b=
julia-pushkina [17]

Answer:

b = 7

Step-by-step explanation:

4b - 4 = 3b + 3

4b - 3b = 3 + 4

b = 7

7 0
3 years ago
Read 2 more answers
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