1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Simora [160]
3 years ago
11

F(-2)=-2²+3(-2)-2 find f(-2)

Mathematics
2 answers:
Serjik [45]3 years ago
8 0
First, solve the exponent. Then multiply 3 and -2 to get -6. Lastly, combine like terms to get the final answer as -12.

olga_2 [115]3 years ago
5 0

Answer:

F(-2)=-2²+3(-2)-2=4+-6×-2=4+12=16

You might be interested in
1) 17, 29, 32, 9, 30, 14, 8, 39, 11, 32, 23<br> Minimum :<br> Maximum:<br> Q1:<br> Q2:<br> Q3:
Lisa [10]

Answer:

Minimum: 8

Maximum: 39

Q1: 11

Q2: 23

Q3: 32

Step-by-step explanation:

Set the numbers into numerical order

8 9 11 14 17 23 29 30 32 32 39

Then separate into quarters

[8 9 11] [14 17 23] [29 30 32] 32 39

6 0
3 years ago
Solve this step by step and explain your answer
viva [34]

Step-by-step explanation:

y = 3x + 5 \\ 2x + 4y = 6 \\ subsitution \\ 2x + 4(3x + 5) = 6 \\ 2x + 12x + 20 = 6 \\ 14x =  - 14 \\ x =  - 1 \\ y = 3x + 5 \\ y =  - 3 + 5 \\ y = 2

7 0
3 years ago
If a = 12 and 120% of a is equal to 80\% of bthen what is a + b ?
Novosadov [1.4K]

Answer:

The answer is 30

Step-by-step explanation:

First you have to find 120% of a (12).

\frac{12}{1}  \times  \frac{120}{100}  = 14.4

Therefore; 14.4 is 80% of b, and we are trying to find 100% of b

14.4 = 80\% \\ x = 100\%

we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.

14.4 \times 100\% = 80\% \times x

This is the same as saying;

14.4  \times 1 = x \times  \frac{4}{5}

100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).

so the new equation is: 14.4= 4/5x

We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so.<em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>30</em>

4 0
2 years ago
In a survey of adults aged 57 through 85​ years, it was found that 86.6​% of them used at least one prescription medication. Com
OleMash [197]

Answer:

a) 272 used at least one prescription​ medication.

b) The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

Step-by-step explanation:

Question a:

86.6% out of 3149, so:

0.866*3149 = 2727.

272 used at least one prescription​ medication.

Question b:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 3149, \pi = 0.866

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.  

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 - 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.856

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 + 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.876

For the percentage:

0.856*100% = 85.6%

0.876*100% = 87.6%.

The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

7 0
3 years ago
A shade of orange paint is made with 5 parts red paint and 15 parts yellow paint. what percent of the paint is red? what is the
Volgvan
1/4           . . . . ........ .. . . .  . . . . .. . .. . . .. . . . 
                                                               
3 0
3 years ago
Other questions:
  • What is the fraction of 83% in simplest form
    12·1 answer
  • Find the least common denominator (LCD) of 10/7 and 1/6 .
    14·2 answers
  • What is the value of x in the equation 25x^2=16? A.+ 5/4 B.+4 C.+ 4/5 D.+16/25
    9·1 answer
  • There are a total of 214 cars and trucks on a lot. If there are four more than twice the number of trucks than cars, how many ca
    9·2 answers
  • Please help me solve this problem please
    13·1 answer
  • Please help me on this question if you would want brianleist!! Tank yah!! ^^
    14·1 answer
  • Help me please trig hw
    7·1 answer
  • Which equation could represent the relationship shown in the
    11·1 answer
  • Ms. Monet gave 2 1/2 cups of red paint to each of her 20 students. How many quarts
    9·1 answer
  • Solve the simultaneous equations 2x + y = 5 and 2y = x – 10.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!