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2 years ago

9

Give me three numbers greater than 20 that I have 9 as a factor

2 answers:

Andrew [12]2 years ago

8 0

27, 36, 45...all have factors of 9 and r greater then 20

ruslelena [56]2 years ago

6 0

27, 36, 45, 54...multiplication of 9

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Professor Halen has 184 students in his college mathematics lecture class. The scores on the midterm exam are normally distribut

AURORKA [14]

Answer: 21

Step-by-step explanation:

Given : The scores on the midterm exam are normally distributed with

$\mu=72.3\\\\\sigma=8.9$

Let X be random variable that represents the score of the students.

z-score: $z=\dfrac{x-\mu}{\sigma}$

For x=82

$z=\dfrac{82-72.3}{8.9}\approx1.09$

For x=90

$z=\dfrac{90-72.3}{8.9}\approx1.99$

Now, the probability of the students in the class receive a score between 82 and 90 ( by using standard normal distribution table ) :-

$P(82$

Now ,the number of students expected to receive a score between 82 and 90 are :-

$184\times0.1146=21.0864\approx21$

Hence, 21 students are expected to receive a score between 82 and 90 .

5 0

2 years ago

One way to help end poverty?

Furkat [3]

Answer:

Ways to end poverty :

Government policies to help poor and fight against poverty.
Offering more jobs.
Giving free education to the needed ones.

Hope it helps!

6 0

3 years ago

Read 2 more answers

What are the solutions of the equation (2x + 3)2 + 8(2x + 3) + 11 = 0

Tom [10]

Answer:

$x=\frac{-7-\sqrt{5}}{2}$ or $x=\frac{-7+ \sqrt{5}}{2}$

Step-by-step explanation:

The given equation is

$(2x+3)^2+8(2x+3)+11=0$

Let us treat this as a quadratic equation in $(2x+3)$ .

where $a=1,b=8,c=11$

The solution is given by the quadratic formula;

$(2x+3)=\frac{-b\pm \sqrt{b^2-4ac} }{2a}$

We substitute these values into the formula to obtain;

$(2x+3)=\frac{-8\pm \sqrt{8^2-4(1)(11)} }{2(1)}$

$(2x+3)=\frac{-8\pm \sqrt{64-44} }{2}$

$(2x+3)=\frac{-8\pm \sqrt{20} }{2}$

$(2x+3)=\frac{-8\pm2\sqrt{5} }{2}$

$(2x+3)=-4\pm \sqrt{5}$

$(2x+3)=-4-\sqrt{5}$ or $(2x+3)=-4+ \sqrt{5}$

$2x=-3-4-\sqrt{5}$ or $2x=-3-4+ \sqrt{5}$

$2x=-7-\sqrt{5}$ or $2x=-7+ \sqrt{5}$

$x=\frac{-7-\sqrt{5}}{2}$ or $x=\frac{-7+ \sqrt{5}}{2}$

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3 years ago

What is m∠1?............

gogolik [260]

the answer is 148

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2 years ago

today only, a sofa is being sold at a 36% discount. The sale price is $560. what was the price yesterday?

pashok25 [27]

Answer:

Step-by-step explanation:

Let yesterday's price be x

Discount percentage = 36%

Sale price = $ 560

(100-36)% of x = 560

64 % *x = 560

$\frac{64}{100}*x=560\\\\x=560*\frac{100}{64}\\\\x=875$

Yesterday's price = $ 875

8 0

3 years ago