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White raven [17]
3 years ago
8

Linda scored 35, 47, and 42 points on three tests. How many points should she get on the fourth test to get an average score of

50?
A. 75 points
B. 76 points
C. 77 points
D. 78 points
Mathematics
1 answer:
timama [110]3 years ago
8 0
A. the answer is 75.............
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FIND THE INVERSE QUESTION. PIC IS BELOW. PLEASE HELP!!
Allisa [31]

Answer: their is no inverse

Step-by-step explanation:Opposite in effect.  

−

5

is the additive inverse of  

5

, because their sum is zero.  

1

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is the multiplicative inverse of  

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8 0
3 years ago
A group of 59 randomly selected students have a mean score of 29.5 with a standard
algol [13]

Answer:

29.5-1.671\frac{5.2}{\sqrt{59}}=28.37    

29.5+1.671\frac{5.2}{\sqrt{59}}=30.63    

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

Step-by-step explanation:

Information given

\bar X = 29.5 represent the sample mean

\mu population mean  

s= 5.2 represent the sample standard deviation

n=59 represent the sample size  

Confidence interval

The confidence interval for the true mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=59-1=58

The Confidence interval is 0.90 or 90%, the significance is \alpha=0.1 and \alpha/2 =0.05, and the critical value is t_{\alpha/2}=1.671

Now we have everything in order to replace into formula (1):

29.5-1.671\frac{5.2}{\sqrt{59}}=28.37    

29.5+1.671\frac{5.2}{\sqrt{59}}=30.63    

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

8 0
2 years ago
Solve the equation. 6x−7=2x+13
Sergio [31]

Answer:

6x - 7 = 2x + 13

6x - 2x = 13 + 7

4x = 20

x = 20/4

x = 5

Hope it helps!

8 0
3 years ago
Read 2 more answers
How many degrees are in a semicircle
Katen [24]

Answer: The answer is 180 degrees

4 0
3 years ago
Read 2 more answers
HELP PLS
olchik [2.2K]

3996  \times  \frac{1}{3}  = 1332
the volume is 1332 in^3


good luck
4 0
3 years ago
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