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BabaBlast [244]
4 years ago
8

Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.

6 and the standard deviation was 8.7. If 18 classes were selected at random, find the probability that the class average is less than 80.
A. 0.7427



B. 0.0396



C. 0.0235



D. 0.1730
Mathematics
1 answer:
Eduardwww [97]4 years ago
4 0
The answer is d 0.1730

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The cost for six months of Netflix is $59.70. What is the cost for one month? Let m represent the cost for one month of Netflix.
zloy xaker [14]

Answer: $9.45


Step-by-step explanation:

Divide 59.70 by 6

59.70/6

9.45

m=$9.45

8 0
3 years ago
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Which is the best estimate for 49% of 598 <br> A. 3 <br> B.30<br> C.300<br> D.3,000
DIA [1.3K]

Answer:

300

Step-by-step explanation:

3 would be extremely low

30 would be low

300 would be about right

3,000 lets not talk about this

Hope this helps

7 0
3 years ago
Read 2 more answers
When does the graph of a quadratic function open up?open down?
EastWind [94]

Answer:

1. >

2. <

Step-by-step explanation:

When a > 0, the graph opens upwards, or positively, because the way the line curves is determined by a.

When a < 0, the graph opens downwards, or negatively, for the same reason.

6 0
3 years ago
what is the length of sides in inches of an equilateral triangle having an included cirle of 60 inches
Anastasy [175]
I assume 60 is the circumference of the circle.
if you sketch the graph, you will see that the radius from the center to the base, half the base, and the line segment form the center to one of the bottom vertex form a 30-60-90 degree triangle, the shortest leg is the radius of the circle, r.
the longer leg is √3r, and the hypotenuse is 2r.
the base of the triangle is 2√3r. 
find r: 2πr=60, r=60/2π
2√3r=2√3*60/(2π)=60√3/π=33
3 0
3 years ago
Which equation is a point slope form equation for line AB ? y+1=32(x−1) y+1=−32(x−1) Four-quadrant Cartesian graph with integer
fenix001 [56]

Answer:

The second option is correct. The point slope form of AB is y+1=\frac{-3}{2}(x-1).

Step-by-step explanation:

The given points are A(-3,5) and B(1,-1).

Slope of a line is

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

Slope of AB is

m=\frac{-1-5}{1-(-3)}

m=\frac{-6}{4}

m=\frac{-3}{2}

The point slope form of a line is

y-y_1=m(x-x_1)

Where, m is slope of the line.

Case 1: The slope of the line is \frac{-3}{2} and the point is (-3,5). The point slope form of AB is

y-5=\frac{-3}{2}(x+3)

Case 1: The slope of the line is \frac{-3}{2} and the point is (1,-1). The point slope form of AB is

y+1=\frac{-3}{2}(x-1)

Therefore the point slope form of AB is y+1=\frac{-3}{2}(x-1). Option 2 is correct.

3 0
3 years ago
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