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
mash [69]
3 years ago
15

Evaluate f(−1)=−3x^3 + 2x^2

Mathematics
1 answer:
Sholpan [36]3 years ago
5 0

Answer:

5

Step-by-step explanation:

f(-1)= -3(-1)³+2(-1)²

= -3(-1)+2(1)

= 3+2

=5

You might be interested in
Ramen purchase a box of candy for himself on the way back to the dorm he ate 2/3 of the candy while he was putting away grocerie
Aleksandr [31]

Answer:

12 chocolates

Step-by-step explanation:

Represent the original number of chocolates by c.  

Then (1/4)(2/3)c = 2

Solving this for c, we multiply both sides by 4:  (2/3)c = 8

and then multiply both sides by (3/2):  c = (3/2)(8) = 12

Originally the box contained 12 chocolates.

6 0
3 years ago
A music store sold 10 to the third CDs and ten to the second CDs players if each CD costs $12 and each CD player costs $35, what
enot [183]
10^3 CDs with CD = $12 then total CDs earnings is (10^3)(12) = $12,000
10^2 CD players with CD plater = $35 then total CD player earnings is (10^2)(12) = $1,200
Total store earnings = ($12,000 + $1,200) = $13,200 
4 0
3 years ago
Read 2 more answers
Which is a better buy: 3 pounds for $3.87 or 5 pounds for $6.65?
ANEK [815]
5 pounds for 6.65 because you will get more pounds for a good amount of money.
7 0
2 years ago
Read 2 more answers
1. The national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15. The dean of a college wants to kno
Nat2105 [25]

Answer:

We conclude that the mean IQ of her students is different from the national average.

Step-by-step explanation:

We are given that the national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15.

The dean of a college want to test whether the mean IQ of her students is different from the national average. For this, she administers IQ tests to her 144 students and calculates a mean score of 113

Let, Null Hypothesis, H_0 : \mu = 100 {means that the mean IQ of her students is same as of national average}

Alternate Hypothesis, H_1 : \mu\neq 100  {means that the mean IQ of her students is different from the national average}

(a) The test statistics that will be used here is One sample z-test statistics;

               T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ N(0,1)

where, Xbar = sample mean score = 113

              s = population standard deviation = 15

             n = sample of students = 144

So, test statistics = \frac{113-100}{\frac{15}{\sqrt{144} } }

                             = 10.4

Now, at 0.05 significance level, the z table gives critical value of 1.96. Since our test statistics is more than the critical value of z which means our test statistics will fall in the rejection region and we have sufficient evidence to reject our null hypothesis.

Therefore, we conclude that the mean IQ of her students is different from the national average.

3 0
3 years ago
50 POINTS!!!!! PLEASE WILL MARK BRAINLIEST
kirill [66]

Answer:

  • Q11 - 12 sides
  • Q12 - 10 sides

Step-by-step explanation:

<u>Use the formula for sum of interior angles of a regular polygon:</u>

  • S = 180(n - 2)

<u>Each angle A measures:</u>

  • S/n = 180(n - 2)/n
  • A = 180(n - 2)n
  • An = 180n - 360
  • (180 - A)n = 360
  • n = 360/(180 - A)
<h3>Question 11</h3>

<u>Each angle is 150, then finding n:</u>

  • n = 360/(180 - 150)
  • n = 360/30
  • n = 12
<h3>Question 12</h3>

<u>Each angle is 144, find n:</u>

  • n = 360/(180 - 144)
  • n = 360/36
  • n = 10
3 0
2 years ago
Read 2 more answers
Other questions:
  • A prediction for the volume at 105 seconds is 497 cm3.
    8·2 answers
  • I need help ASAP ! I don't understand it! Anyone??
    15·2 answers
  • How do you write 1.25 into a fraction
    15·2 answers
  • Use the intercept form to find the equation of the line with the given intercepts. The intercept form of the equation of a line
    11·1 answer
  • Aggie is an Australian exchange student in China, and she currently has 14,000 yuan in her bank account. If the exchange rate ch
    14·1 answer
  • What is the equation of the line, in slope-intercept form, that passes through the point (0,7) and is perpendicular to the line
    8·1 answer
  • Uber charges $0.80 per mile and a booking fee of $2.30. Lyft charges $1.07 per mile with no booking fee. Which of the systems of
    11·1 answer
  • HELPPPPP What is the combine legth of all the buttons longer than 1 inch
    10·1 answer
  • Can someone help me with this?
    11·1 answer
  • Can someone help me with this problem? thanks!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!