All categories

3 years ago

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

Pls help me on this i don't know what to do

Katarina [22]

Answer:

$\text{A. The zeroes are 8 and -4, because }y=(x-8)(x+4)$

Step-by-step explanation:

$x^2-4x-32=0,\\(x-8)(x+4)=0,\\\begin{cases}x-8=0, x=\boxed{8},\\x+4=0, x=\boxed{-4}\end{cases}$

8 0

4 years ago

A baker's bread recipe calls for 3

xenn [34]

Answer: 6 cups
explanation: she has 1 cup measuring cup and has to fill it 3 times for each loaf 3*2=6

8 0

3 years ago

Find all real numbers X such that 4x+2≥14 and -21x+1<22

kondor19780726 [428]

$\begin{cases}4x+2\ge14\\-21x+1$

In the first inequality, we have

$4x+2\ge14\implies4x\ge12\implies x\ge3$

In the second, we have

$-21x+1$

The solution to the system is the intersection of these two intervals, which would be $x\ge3$ .

3 0

3 years ago

Jonathan parents told him that for every 5 hours of homework or reading he completed

Murrr4er [49]

Finish your statement... I'm anxious to help!

4 0

3 years ago

Probabilities are between 0 and 1. A probability of 0 means that an event occur or that it is for the event to occur. If it is u

Greeley [361]

Probabilities are real numbers between 0 and 1. A probability of 0 means that an event will not occur or that it is impossible for the event to occur. If it is unlikely that the event will occur, then the probability of that event is closer to zero. If it is equally likely that the event will occur or that the event will not occur, then the probability is one-half. If it is very likely that an event will occur, then the probability of that event is closer to one. If the event will definitely occur, then the probability of that event is equal to one. A sample space has uniform probability when all of the possible outcomes of the sample space have equal<span> probabilities.</span>

8 0

3 years ago