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Alisiya [41]
3 years ago
9

Last semester you took 3 final exams and you want to figure out which exam score really is your best score. Here are the scores

from your classes. Which of your three exam scores is the worst when compared to the other students in your classes? Math: Your score = 78, Class mean = 82, Standard deviation = 5 History: Your score = 85, Class mean = 87, Standard deviation = 4 English: Your score = 80, Class mean = 76, Standard deviation = 2.5.
Mathematics
1 answer:
Mademuasel [1]3 years ago
6 0

Answer:

76

Step-by-step explanation:

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Yo please help
Alex Ar [27]

Answer:

Options 1, 3 and 4 are true

Step-by-step explanation:

The legs EF and DF of the right triangle DEF have lengths of 24 units and 7 units, respectively. By the Pythagorean theorem,

DE^2=EF^2+DF^2\\ \\DE^2=24^2+7^2\\ \\DE^2=576+49\\ \\DE^2=625\\ \\DE=25\ units

Find trigonometric functions:

\sin \angle D=\dfrac{\text{Opposite leg}}{\text{Hypotenuse}}=\dfrac{EF}{DE}=\dfrac{24}{25}

\cos \angle E=\dfrac{\text{Adjacent leg}}{\text{Hypotenuse}}=\dfrac{EF}{DE}=\dfrac{24}{25}

\tan \angle D=\dfrac{\text{Opposite leg}}{\text{Adjacent leg}}=\dfrac{EF}{DF}=\dfrac{24}{7}

\sin \angle E=\dfrac{\text{Opposite leg}}{\text{Hypotenuse}}=\dfrac{DF}{DE}=\dfrac{7}{25}

Thus, options 1, 3 and 4 are true

5 0
3 years ago
Read 2 more answers
CAN SOMEONE PLS HELP ME I WILL MAKE BRAINLIEST PLSSS
love history [14]

Answer:

a) 300 miles

b) 2pm}

That is all I can help you :(

Step-by-step explanation:

8am + 6hrs =14hrs =2pm

6 0
3 years ago
Find the x-intercept and the y-intercept of 2x + 6y =24
viktelen [127]

Answer:

x-intercept = 12, y-intercept = 4

Step-by-step explanation:

To find the x and y intercept, substitute 0 in for both values.

<u>Substitute 0 into x:</u>

2(0) + 6y = 24

6y = 24

<u>Divide each side by 6:</u>

y = 4

<u>Substitute 0 into y:</u>

2x + 6(0) = 24

2x = 24

<u>Divide each side by 2:</u>

x = 12

4 0
2 years ago
If Sin 3x= Cos (x-60), find the value of x​
Kamila [148]

Answer:

x = 15

Step-by-step explanation:

Assuming 3x and x-60 are in degrees, you can use:

cos(a) = sin(a+90)

To rewrite the equation as:

sin(3x) = sin(x-60+90)

sin(3x) = sin(x+30)

3x = x+30

2x = 30

x = 15

But, solving 3x = x+30 which simplifies to x=15 is not the only solution to this equation, as you can see in below picture. Finding all solutions is a bit more work, but maybe that is not required in your case.

4 0
3 years ago
David can proofread15 reports in an hour while Armando can proofread 37reports in an hour. If they have 400 reports to proofread
ycow [4]
Together, it would take them 6 hours
8 0
3 years ago
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