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enyata [817]
3 years ago
13

Ashley’s math average decreased 12 points to 78. Then she completed an extra credit assignment and raised her final average by 5

points. Write an equation to show how Ashley’s average changed.
What was her starting average? ____ points

How much did her average increase or decrease, overall? ____ points

What was her final average? ____ points
Mathematics
3 answers:
andriy [413]3 years ago
3 0

What was her starting average? 93 points

How much did her average increase or decrease, overall? 5 points

What was her final average? 83 points

mrs_skeptik [129]3 years ago
3 0

Her starting adverage was 90

Overall change=7

Final adverage=83

x-man2 years ago
0 0

thank you !!!!!!!!!!!!!!!!!

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(1 - cos ß)(1 + cos ß) =1/cosec^2(ß)
iVinArrow [24]

Step-by-step explanation:

L.H.S=(1-cosB)(1+cosB)

=(1-cos^2B). {using (a+b) (a-b)=(a^2-b^2)in second step}

=sin^2B

=1/cosec^2B

Therefore,L.H.S=R.H.S proved

5 0
2 years ago
What is the slope of o line that passes through (-4,-14) and (19,11)?
DerKrebs [107]

Answer:

D, see description below.

There is a possible typo in the problem since these points have slope 25/23.

Step-by-step explanation:

To find the slope of a line, calculate the distance between points with a ratio of vertical to horizontal distance. This is done using the formula:

m=\frac{y_2-y_1}{x_2-x_1}

Here the points are (-4,-14) and (19,11). Substitute and simplify.

m=\frac{11--14}{19--4}=\frac{11+14}{19+4}=\frac{25}{23}

I think there is a typo in your points (-4,-14) and (19,11) because the answer doesn't align to the answer choices. But based on them, I would answer D or 24/23 since it's the closest value.

6 0
3 years ago
The population of a particular country was 26 million in 1981; in 1990, it was 31 million. the exponential growth function descr
yuradex [85]
Just use syblol it is verygood for varible form 
5 0
2 years ago
An educational psychologist wishes to know the mean number of words a third grader can read per minute.
Rama09 [41]

Answer: 208.

Step-by-step explanation:

The formula to find the minimum sample size is given by :-

n= (\dfrac{z^*\times \sigma}{E})^2                                    (1)

, where z* = critical z-value (two tailed).                                                                      

\sigma = Standard deviation ( from prior study ) and E = Margin of error.

As per given , we have

Margin of error : E= 0.29

Confidence level = 85%

Significance level =\alpha=1-0.85=0.15

Using z-table , the critical value (two -tailed)=z^*=z_{\alpha/2}=z_{0.15/2}=z_{0.075}=1.439

As per previous study , Variance =\sigma^2=8.41

\sigma=\sqrt{8.41}=2.9

Now, the required minimum sample size = n= (\dfrac{(1.439)\times (2.9)}{0.29})^2   [Substitute the values in formula (1)]

n=(14.39)^2

n=207.0721\approx208  [ Round to the next integer]

Hence, the minimum number of third graders that must be included in a sample = 208.

5 0
3 years ago
As professional sports teams become more and more profitable, the salaries paid to the players have also increased. In fact, man
lesya [120]

Answer: Median

Step-by-step explanation:

some sport superstars are paid extremely huge salaries, but this is not always the case for all spott stars. Since the mean is largerly influenced by the large salaries the data becomes unrelaible When estimating the center but reliable when it comes down to representing the center. With this reason is why the median would be considered.

7 0
3 years ago
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