50 points! I will mark brainliest! Random answers will be reported!

Answer:

p=39/45=13/15

Step-by-step explanation:

This question is incomplete, the complete question is;

Refer to the Exhibit Student Grades. A professor at a local university noted that the grades of her students were normally distributed with a mean of 73 and a standard deviation of 11.

The professor has informed the class that 7.93 percent of her students received grades of A. What is the minimum score needed to receive a grade of A

Answer:

the minimum score needed to receive a grade of A is 88.51

Step-by-step explanation:

Given the data in the question;

Let x represent the grades of the students that were normally distributed with mean μ = 73 and standard deviation σ = 11.

so, The professor has informed the class that 7.93 percent of her students received grades of A

the minimum score needed to receive a grade of A will be:

P( X > x ) = 7.93 %

P( X > x ) = 0.0793

1  - P( X ≤ x ) = 0.0793

- P( X ≤ x ) = 0.0793 - 1

- P( X ≤ x ) = - 0.9207

P( X ≤ x ) = 0.9207

⇒ P( X-μ/σ ≤ x-μ/σ ) = 0.9207

so, x-μ/σ = InvNormal( 0.9207 )  

x-μ/σ = 1.41

(x - 73) / 11 = 1.41

(x - 73) = 1.41 × 11

(x - 73)  = 15.51

x = 15.51 + 73

x = 88.51

Therefore, the minimum score needed to receive a grade of A is 88.51

Answer:

The last answer D.

Step-by-step explanation:

There is a short trick that I just used to answer this question, all you have to do is add 12 plus 5 to see how many 1/12ths you would have and then add up all the answer options until you get to 17, and the only one that does is the last one, D.

Hope this helps :)

Answer:

b = 12

Step-by-step explanation:

First, distribute 3/4 to both terms in the parentheses:

3 = 3/4(b - 8)

3 = 3/4b - 6

Now, solve for b:

9 = 3/4b

12 = b

So, the answer is b = 12

Answer:

12

Step-by-step explanation:

3 = 3/4 x (b-8)

Distribute 3/4 through the parentheses

3 = 3/4 b - 6

Multiply both sides of the equation by 4

12 = 3b - 24

Move the variable to the left - hand side and change its sign

-3b = -24 - 12

Calculate the difference

-3b = -36

Divide both sides of the equation by -3

B = 12

Answer:

QR and ST

Explanation:its right

Answer:

8.5

Step-by-step explanation:

Twice the difference of a number and 6 equals 5 is written algebraically as 2(x-6)=5, where x is the number. Solving for x:

2(x-6)=5

(x-6)=5/2

x=6+5/2

x=17/2

So the number is 17/2, or, expressed as a decimal number, 8.5

Answer:

Surprisingly someone asked the same question.

Step-by-step explanation:

Credit to the person who actually answered.

Answer:

D is the correct answer

im sure

Answer:6

Step-by-step explanation:

Step-by-step explanation:

Given

radius (r) = 9 cm

Area of the circle (A)

= πr²

= 3.14 * 9²

= 3.14 * 81

= 254.34 cm²

Answer:

Answer C.

Step-by-step explanation:

The class sells them for $2.95, assuming $0.95 manufacturing cost per, leaving $2.00 profit per bag. If they sell 900-1000 packages at $2.00, it leaves $1800-$2000 profit.

Answer:

if you see they have 2.95 and 0.95 you need to combert to a decimal and then you need to subtract 900 and 1,000

Step-by-step explanation:

and oviosly is a 900

Answer:

7:04 p.m.

Step-by-step explanation:

Answer:

7:04

Step-by-step explanation

12-8 + 4

5:52 + 0:08 = 6:00

6:00 + 1:00 + 7:00

7:00 + 0.04 = 7:04

Answer:

$10,579, assuming that 22% is the rate per month

Step-by-step explanation:

Here, I'll assume that the interest rate is per month.

The simple interest formula is [tex]I=Prt[/tex] (Interest = principal * rate * time). The rate and time need to use the same units.

The principal is $3550, the rate is 0.22, and the time is 9, so [tex]I=(3550)(0.22)(9)[/tex]. The product is 7029.

This is added to how much money he already has: 7029+3550=10579

Answer:

8:30

Step-by-step explanation:

Because 6 ÷ 4 is 1.5. also know as 1.5hrs before bedtime.

Answer: I think the answer is 8:30

Step-by-step explanation:

6÷4= 1.5

8:30 + 1:30 = 10:00

Answer:

Sorry it appears that that I can't answer this question because I need more info than that to answer.

Step-by-step explanation:

x=60° because if 150°=90°+60° so a line is 180° consequently

90°+30°+x=180°

120°+x°= 180°

x°= 180°-120°= 60°

Answer: x √7

Step-by-step explanation: A.P.E.X

Answer to your question is x√7 :)

Answer:

D ko alam hahahahhahaahahahahahahahahahahahahahahahaaha

1) remover parentheses.

[tex]30 \times \frac{300}{30} = 300[/tex]

2) cancle 30.

[tex]300 = 300[/tex]

3) Since both sides equal, there are infinitely many solutions.

Infinitely Many Solutions.

Answer:

1248

Step-by-step explanation:

Surface are of a rectangular prism can be found using:

A=2(wl+hl+hw)

Plug in the given values of

l= 12m

w=12m

h=20m

to this equation and you get:

1248

Answer:

263/280 or 0.9

Step-by-step explanation:

if daniel has 17 raffle tickets that mea\ns he has 17 chances of winning. and the question says chance that he wont win

so  

280-17 (out of 280)

=263/280

X^2= AB^2 + BC^2

X^2= 8^2 + 10^2

X^2= 64+100

X^2= 164

X= 12.80

Answer:

3/8

Step-by-step explanation:

First convert 1/2 into eights. 1/2 as eighths is 4/8.

So 4/8-1/8=3/8.

Therefor, 3/8 is the answer you're looking for.

I hope I helped :)

Answer:

3/8

Step-by-step explanation:

you have to find the LCM (least common multiplier) of 2,and 8 and that would be 8 therefore youd change the fractions from 1/2-1/8 to 4/8-1/8  you subtract the tops and keep the bottoms the same as 8. so 4-1=3 therefore the anwser would be 3/8

Answer:

x = -1

Step-by-step explanation:

-8x - 28 = 2x - 18

      +28  +28

-8x = 2x + 10

  -2x  -2x

-10x = 10

÷-10 ÷-10

x = -1

Answer:

1.Distribute

2.Add 28 to both sides

3.Simplify

4.Subtract 2x from both sides

5.Simplify

6.Divide both sides by the same factor

7.Simplify

x =-1

Answer:

C. 2/5

Step-by-step explanation:

IF  a = 5/2 then

1/a = 2/5

Hope it will help :)

Answer:

(i)The length of room = 5.5 m and width of the room = 4 m

The length of room with verandah = 5.5 + 2.25 + 2.25 = 10 m

The width of room with verandah = 4 + 2.25 + 2.25 = 8.5 m

Area of verandah = Area of room with verandah – Area of room without verandah = Area of ABCD – Area of EFGH = (AB x AD) – (EF x EH) = (10 x 8.5) – (5.5 x 4) = 85 – 22 = 63 m2

(ii) The cost of cementing 1 m2 the floor of verandah = Rs 200 The cost of cementing 63 m2 the floor of verandah = 200 x 63 = Rs 12,600

Answer:

D

Step-by-step explanation:

Remark

The two angles across from each other are equal.

Equation

5x - 1 = 124                  Add 1 to both sides

Solution

5x - 1  + 1 = 124 + 1      Combine

5x = 125                      Divide by 5

5x/5 = 125/5

x = 25