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
hichkok12 [17]
3 years ago
11

If f(x) = 8x2-5, what is f(-1)

Mathematics
2 answers:
Klio2033 [76]3 years ago
5 0

Step-by-step explanation:

Remember math is a language

f(x) : A function of x where x can be <em>any</em><em> </em>number including a number you choose

when you see f(-1), this tells you what the function is at <em>this</em> given x value. So you substitute - 1 wherever you see x

8(-1)2 - 5

Nikolay [14]3 years ago
4 0

Answer:3

Step-by-step explanation:

Simply plug in -1 for anywhere you see x in the equation so...

8(-1)^2-5

8(1)-5

8-5

3

Hope this helps

You might be interested in
What does |-9.23-1.79| - |7.34-2.57| equal?
liubo4ka [24]

Answer:

Answer:

11.02-9.91= 1.11

Step-by-step explanation:

|-11.02| - |-9.91| (First solve in absolute)

11.02 - 9.91 (any values outside absolute becomes positive)

1.11

Step-by-step explanation:

4 0
3 years ago
Find the value of the trigonometric ratio. Simplify the ratio if possible.
sweet [91]

Step-by-step explanation:

Given that,

BC = 8

Ac = 15

We can find AB using the pythagoas theorem.

AB=\sqrt{AC^2+BC^2}\\\\=\sqrt{15^2+8^2}\\\\AB=17

We know that,

\cos\theta=\dfrac{B}{H}, B is base and H is Hypotenuse

\cosB=\dfrac{8}{17}

Hence, this is the required solution.

3 0
3 years ago
Please helppppppp ❤️
liberstina [14]

Answer:

Inverse of f exists.

Step-by-step explanation:

From the graph attached,

If we do the horizontal line test for the function graphed,

We find the function as one to one function.

In other words for every input value (x-value) there is a different output value.

Since, for one-to-one functions, inverse of the functions exist.

Therefore, the answer will be,

The inverse of 'f' exists.

7 0
3 years ago
Write a function G whose graph represents a reflection in the y-axis of the graph of f (x) = |2x–1|+3
crimeas [40]

Answer: Did you find an answer yet?? Lol

Step-by-step explanation:

8 0
3 years ago
What is the solution to the equation 3(2x+5) = 3x+4x?
n200080 [17]
X=15
expand the brackets and collect like terms so 6x+15=7x
then -6x to get x=15
4 0
3 years ago
Other questions:
  • Which statements about opposites are true?
    9·1 answer
  • What is the probability that 3 of the next 4 patient who have this operation survive?
    13·1 answer
  • (a) Plot the following function ona Karnaugh map.(Do not expand to minterm form before plotting.)
    11·1 answer
  • Plz help.....?.!.!.!.!.!.!.!.!.!.!.!.
    15·2 answers
  • Why is the second survey more belivable than the first?
    6·1 answer
  • There are 600 seats in the jefferson middle school auditorium. the students are using 2/3 of the seats. There are 25 seats being
    8·1 answer
  • Jenny has 12 marbles.
    13·1 answer
  • Can someone plz help me with this one problem plz!!
    10·2 answers
  • Tina contributes 9.5% of her monthly salary towards her 401(k) and her employer matches her contribution up to 5.4% of her annua
    15·2 answers
  • 1 of 121 of 12 Items
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!