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
s344n2d4d5 [400]
2 years ago
10

Given the function below find f(7) f(x)= -x^2+9x

Mathematics
1 answer:
stellarik [79]2 years ago
7 0

Answer:

112

Step-by-step explanation:

f(7) = 7^2 + 9*7 = 49 + 63 = 112

You might be interested in
HELP PLEASE WILL PICK BRAINLEST IF I ANSWER CORRECTLY!<br> the bubble thats in igonore it!
vampirchik [111]

Answer:

4. (d, the last one)

5. (a, the first one)

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
 A barrel contains 56 litres of kerosene. It has two taps. One tap draws 500 ml every 6 minutes. After first 5 litres are drawn
tigry1 [53]

Answer:

The tank will empty in 4 hours.

Step-by-step explanation:

Since a barrel contains 56 liters of kerosene, and it has two taps, one tap that draws 500 ml every 6 minutes and after first 5 liters are drawn from the barrel, the second tap also starts, and it draws 1 liter in every 5 minutes, to determine how many hours will be taken in all to empty the tank, the following calculation must be performed:

0.5 x X = 5

X = 5 / 0.5

X = 10

10 x 6 = 60

1 hour = 51 liters

1 hour 30 minutes = 51 - (1 x 6) - (0.5 x 5) = 42.5

2 hours = 42.5 - (1 x 6) - (0.5 x 5) = 34

2 hours 30 minutes = 34 - (1 x 6) - (0.5 x 5) = 25.5

3 hours = 25.5 - (1 x 6) - (0.5 x 5) = 17

3 hours 30 minutes = 17 - (1 x 6) - (0.5 x 5) = 8.5

4 hours = 8.5 - (1 x 6) - (0.5 x 5) = 0

Therefore, the tank will empty in 4 hours.

3 0
3 years ago
Using suitable identity find 231^222-131^2​
Sliva [168]

Given:

Consider the expression is

231^2-131^2

To find:

The value of given expression using a suitable identity.

Solution:

We have,

231^2-131^2

Using the identity a^2-b^2=(a-b)(a+b), we get

231^2-131^2=(231-131)(231+131)

231^2-131^2=(100)(362)

231^2-131^2=36200

Therefore, the value of the given expression is 231^2-131^2=36200.

7 0
2 years ago
Please help pleaseeeeeee
marysya [2.9K]

Answer:

B

Step-by-step explanation:

it's basically 2+7

3 0
2 years ago
Read 2 more answers
A cognitive psychologist would like to evaluate the claim that the omega-3 fatty acids can help improve memory in normal adult h
bogdanovich [222]

Answer:

(a)

  • Independent Variable- Dosage of Omega-3 Fatty Acids
  • Dependent Variable - Number of news item remembered

(b)Discrete

(c)Ratio Scale and Discrete Variable

(d) Experimental Method

Step-by-step explanation:

The psychologist wants to evaluate the claim that omega-3 fatty acids can help improve memory in normal adult humans.

(a)In the study, the participants in the two groups were given fish extracts containing Omega-3 (500 mg) and no Omega-3 (0 mg).

The memory test involves measuring the number of items each participant remembers from the past three weeks of news.

Therefore:

  • Independent Variable- Dosage of Omega-3
  • Dependent Variable - Number of news item remembered

(b) The dependent variable is discrete since the number of news items remembered can only be whole numbers.

(c)The independent variable is in milligrams of Omega-3 where the placebo is 0 mg. This is a ratio scale since it has an absolute zero.

Since the dosage is given in multiples of 50mg, it is a discrete variable.

(d)Since the psychologist seeks to manipulate the conditions of the study by introducing Omega-3 to some of the participants and placebo to other participants, it is an experimental distribution.

5 0
3 years ago
Other questions:
  • The diameter of a blood cell is measured in micrometers .A micrometer is 0.0000001 meter . Which expression represents this numb
    5·1 answer
  • Stacy is making 2, 1/4 batches of cookies. If each batch calls for 1/3 of a cup of sugar, how much sugar will Stacy use?
    9·2 answers
  • What percent of 7.5 is 0.9
    15·1 answer
  • How do you solve questions 5,7 and 9 in the picture?
    14·1 answer
  • Please help me with this question ASAP
    7·1 answer
  • one pound of swordfish costs as much as 1.5 pounds of salmon. Mrs Ortiz pays $39 for 2 pounds of salmon and 3 pounds of swordfis
    12·2 answers
  • What is the perimeter of PQR? Show your work.
    10·2 answers
  • Consider two points on the PPF: point A, at which there are 50 oranges and 100 apricots, and point B, at which there are 51 oran
    15·1 answer
  • Winston earns $140.00 by selling 56 hotdogs at a concession stand at school Using the same rate for the cost of one hotdog, how
    15·1 answer
  • Plz help will give brainliest
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!