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
mestny [16]
3 years ago
14

F(x) = -2x²-2x+10, find f(2)

Mathematics
1 answer:
beks73 [17]3 years ago
3 0

Answer:

f(2) = -2

Step-by-step explanation:

Substitute 2 everywhere you see an x so f(2) = -2(2^{2}) - 2(2) + 10 so

f(2) = -2(4) - 4 + 10, so f(2) = -8-4+10, f(2) = -12+10, f(2) = -2

You might be interested in
I Really Need Help With This One Can Some One Plz Help Me?
Lapatulllka [165]
1.6²=1.6 times 1.6=2.56
4 0
3 years ago
a study was to be undertaken to determine if a particular training program would improve physical fitness. an srs of 31 universi
Nataliya [291]

Step-by-step explanation:

A study was to be undertaken to determine if a particular training program would improve physical fitness. A sample of 31 university students was selected to be enrolled in the fitness program. The researchers wished to determine if there was evidence that their sample of students differed from the general population of untrained subjects. The sample mean is 47.4 and a standard deviation of 5.3. The 98% confidence interval is determined and is given as, (45.2, 49.6) .

If the level of confidence is changed to 95%, then the confidence interval will become shorter but the p-value will not change because it is calculated using the test statistic. So the correct answer is (a).

3 0
1 year ago
What is the perimeter of a triangle with the given side lengths? s1 = x – 3 ft s2 = x 2 ft s3 = x 4 ft
choli [55]
The perimeter of the triangle with those given lengths is x7-3
4 0
3 years ago
Dwayne drove 18 miles to the airport to pick up his father and then returned home. On the return trip he was able to drive an av
Nesterboy [21]

Answer:

30 mph

Step-by-step explanation:

Let d = distance (in miles)

Let t = time (in hours)

Let v = average speed driving <u>to</u> the airport (in mph)

⇒ v + 15 = average speed driving <u>from</u> the airport (in mph)

Using:  distance = speed x time

\implies t=\dfrac{d}{v}

Create two equations for the journey to and from the airport, given that the distance one way is 18 miles:

\implies t=\dfrac{18}{v}  \ \ \textsf{and} \ \  t=\dfrac{18}{v+15}

We are told that the total driving time is 1 hour, so the sum of these expressions equals 1 hour:

\implies \dfrac{18}{v} +\dfrac{18}{v+15}=1

Now all we have to do is solve the equation for v:

\implies \dfrac{18(v+15)}{v(v+15)} +\dfrac{18v}{v(v+15)}=1

\implies \dfrac{18(v+15)+18v}{v(v+15)}=1

\implies 18(v+15)+18v=v(v+15)

\implies 18v+270+18v=v^2+15v

\implies v^2-21v-270=0

\implies (v-30)(v+9)=0

\implies v=30, v=-9

As v is positive, v = 30 only

So the average speed driving to the airport was 30 mph

(and the average speed driving from the airport was 45 mph)

8 0
2 years ago
Read 2 more answers
Solve the inequality<br><br> x/4 - 2x/4&gt;-3
Dennis_Churaev [7]

Answer:

x<12

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Ms. Luna is waterproofing the top of a rectangular wood deck. The width of the deck is 3 m less that the length. The length is 8
    15·1 answer
  • ......................................
    14·1 answer
  • What is the theoretical probability of spinning an even number?
    5·2 answers
  • Find the values of x and y.
    15·1 answer
  • 2x – 4y = 24<br> x + 3y = 7<br> Solve by elimination
    9·1 answer
  • Pattern is 3,-6,12,4,20
    9·1 answer
  • If you roll a dice three times what is the probability of rolling an odd number each time
    13·2 answers
  • Name the Property of Equality that justifies this statement:If l=m , then m=l .
    9·2 answers
  • Plot the points of the transformation Ry−axis (FGHIJ).<br> I will give brainliest!
    5·2 answers
  • 2y+4x=14 is it infinite no solution one solution ??????
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!