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
babymother [125]
3 years ago
15

If f(x) = 2x2 − 30, find f(4).

Mathematics
1 answer:
Naddik [55]3 years ago
8 0

Just replace x = 4

2x^2 - 30

=2 *(4)^2 -30

= 2 * 16 - 30

= 32 - 30 

= 2

Answer is 2

You might be interested in
Guo Qi watches 151515 videos on Khan Academy every day. Each video is 888 minutes long on average. For how many days does Guo Qi
lozanna [386]

Answer:

Guo Qi requires 75 days to watch videos on Khan Academy.

Step-by-step explanation:

We are given the following in the question:

Number of videos watched by Guo Qi each day = 15

Average length of each video = 8 minutes

Total minutes of video = 9000 minutes

Total number of videos to be watched =

=\dfrac{\text{Total minutes}}{\text{Average length of video}}\\\\=\dfrac{9000}{8}=1125

Guo Qi needs to watch 1125 videos.

Number of days required =

=\dfrac{\text{Total number of videos}}{\text{Videos watched in one day}}\\\\=\dfrac{1125}{15}=75

Guo Qi requires 75 days to watch videos on Khan Academy.

6 0
2 years ago
When interrogating paragraphs, if the paragraph gives an opposite argument to the one before it, then _____.
Zarrin [17]

Answer:

When interrogating paragraphs, if the paragraph gives an opposite argument to the one before it, then <u>add a transition, such as however</u> .

Step-by-step explanation:

"However" expresses disappointment of what is mentioned in the previous paragraph to that of now.

<h3><em><u>MissSpanish</u></em></h3>
3 0
2 years ago
Simplify. show work please 5 1/3+(-3 9/18)
Nikolay [14]
51/3+-39/18

= 89/6

Answer is 14.833333
8 0
2 years ago
Plssssss help me ASAP!!!!!
Pani-rosa [81]

Answer:

6

Step-by-step explanation:

plug in 8 for all p so 4^2 = 16 / 8 x 3 ---> 2 x 3 = 6

6 0
3 years ago
Mr. Smith paid $36.36 for a carpet. This amount includes a tax of 10%. What was the cost of the carpet before tax?
ser-zykov [4K]

Answer:

32.72

Step-by-step explanation:

36.36/100

0.3636

0.3636 times 90 (I use 90 because 100-10=90) 10% tax, so 90% original cost.

32.72

8 0
3 years ago
Other questions:
  • A country's population in 1992 was 72 million. In 1998 it was 76 million. Estimate the population in 2012 using the exponential
    7·1 answer
  • How do you write 290 as a decimal
    14·1 answer
  • What’s the answers????!!!!
    7·1 answer
  • Fred's cafe uses 2 bags of coffee every day. How long will 2/3 of a bag of coffee last?
    6·1 answer
  • A bowl of fruit is on the table.  It contains 3 apples, 5 oranges, and 2 pears.  Ryan and Kenneth come home from school and, at
    5·1 answer
  • Maricel is programming an archery component of a new video game. In her code, she has created an "auto aim" feature that helps p
    8·2 answers
  • Georgianne completed 60% of her homework assignment. write the portion of her homework that she still needs to complete as a fra
    10·2 answers
  • At Scobee Middle School, 35% of the seventh graders ride the bus to school. If there are 320 seventh graders, how many 7th grade
    12·1 answer
  • One eighth is less than one seventh
    13·1 answer
  • 45<br> 23<br> ​<br> +(− <br> 45<br> 23<br> ​<br> )
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!