All categories

2 years ago

5r^2-44r+120 = -30r+11r

1 answer:

3 0

$5r^2-44r+120 = -30r+11r \\ \\ 5f^2 - 44r + 120 = -19r \\ \\ 5r^2 - 44r + 120 + 19r = 0 \\ \\ 5r^2 - 25r + 120 = 0 \\ \\ r = \frac{25+5 \sqrt{71i} }{10} , \frac{25-5 \sqrt{71i} }{10} \\ \\ r = \frac{5+ \sqrt{71i} }{2} , \frac{5 - \sqrt{71i} }{2} \\ \\ ANSWER: r = \frac{5+ \sqrt{71i} }{2} , \frac{5 - \sqrt{71i} }{2}$

You might be interested in

Roy's average balance checking account pays simple interest of 4.8% annually and he made $2.25 in interest last month. What was

Leona [35]

Answer:

It’s 5625.00 don’t listen to this other one

Step-by-step explanation:

5 0

2 years ago

In Exercises 15-18, find the measure of the exterior angle.

valina [46]

Answer:

The measure of the exterior angle is 92 degrees

Step-by-step explanation:

Problem 16)

we know that

An exterior angle of a triangle is equal to the sum of the opposite interior angles

In this problem

$(2x-2)\°=x\°+45\°$

solve for x

$2x-x=45+2$

$x=47\°$

Find the measure of the exterior angle

$(2x-2)\°=(2(47)-2)=92\°$

6 0

2 years ago

the chorus has 35 members. which expression represents the number of ways a group of 6 members can be chosen to do a special per

zimovet [89]

You have to choose $6$ members from the group of $35$ people. So there are $\binom{35}{6}$ ways to do it.

3 0

2 years ago

Read 2 more answers

Two hundred randomly selected people were asked to state their primary source for news about current events: (1) Television, (2)

NeTakaya

Answer:

Step-by-step explanation:

Hello!

You have a sample of 200 people, they were asked their primary source of news, categorized in (1) Television, (2) Radio, (3) Internet and (4) Other.

And your objective is to test if the proportions in this sample follow the known frequencies 10%, 30%, 50%, and 10%.

The propper statistic test to use to probe if the sample follows the known or historical distribution is Chi-Square goodness of fit test. In this test, what you state in the null hypothesis is the model or distribution you want to test. In this case, you've to write down the proportions for each category:

H₀: P(1)= 0.10; P(2)= 0.30; P(3)= 0.50; P(4)= 0.10

I hope you have a SUPER day!

7 0

2 years ago

At noodle & company restaurant, the probability that a customer will order a nonalcoholic beverage is .46. Find the probabil

skelet666 [1.2K]

Answer:

0.0021

Step-by-step explanation:

Given:

Probability of ordering a nonalcoholic beverage is, $P(N)=0.46$

Number of samples are $n=10$

Now, the complement of event 'N' is not ordering a nonalcoholic beverage.

Therefore, $P(\overline N)=1-P(N)=1-0.46=0.54$

Now, for a sample of '10' customers, the probability of not ordering a non alcoholic beverage is product of their individual probabilities as all these events are independent events.

Therefore, probability that none of the 10 will order a nonalcoholic beverage is given as:

$=[P(\overline N)]^{10}\\\\=(0.54)^{10}\\\\=0.0021$

5 0

2 years ago