All categories

4 years ago

Given the relation y = –4x2 – 8, if the input is 2, what is the output?

Mathematics

2 answers:

pochemuha4 years ago

8 0

Answer:

So is it right

Step-by-step explanation:

UkoKoshka [18]4 years ago

5 0

-24.
You Find This By Putting In To The Second Power.
-4 x 2² - 8

You might be interested in

At a school with 100? students, 33 were taking? Arabic, 32 ?Bulgarian, and 40 Chinese. 9 students take only? Arabic, 12 take onl

Stels [109]

Answer: The answer is 4 and 32.

Step-by-step explanation: Let "A", "B" and "C" represents the set of students who were taking Arabic, Bulgarian and Chinese respectively.

The, according to the given information, we have

$n(A)=33,~~n(B)=32,~~n(C)=40,~~n(A\cap B)=14.$

Let 'p' represents the number of students who take all the three languages, then

$n(A\cap B\cap C)=p.$

Also,

$n(A)-n(A\cap B)-n(A\cap C)+n(A\cap B\cap C)=9\\\\\Rightarrow n(A\cap B)+n(A\cap C)=24+p~~~~~~~~~~~~~~(a),\\\\n(A\cap B)+n(B\cap C)=20+p~~~~~~~~~~~~~~(b),\\\\n(B\cap C)+n(A\cap C)=20+p~~~~~~~~~~~~~~~(c).$

From here, we get after subtracting equation(c) from (b) that

$n(A\cap B)=n(A\cap C)=14.$

Therefore,

$p=14+14-24=4,$ and from equation (a), we find

$n(B\cap C)=24-14=10.$

Thus,

$n(A\cap B\cap C)=4$ and

$n(A\cup B\cup C)=n(A)+n(B)+n(C)-n(A\cap B)-n(B\cap C)-n(A\cap C)+n(A\cap B\cap C)\\\\\Rightarrow n(A\cap B\cap C)=33+32+40-9-12-20+4\\\\\Rightarrow n(A\cap B\cap C)=68.$

Thus, the number of students who take all the three languages is 4 and the number of students who take none of the languages is 100-68 = 32.

5 0

3 years ago

__ Find the midpoint of AB, where A(7,6) and B(4, 2).

AVprozaik [17]

Answer:

(11/2,4)

Step-by-step explanation:

8 0

4 years ago

Tehee fwee pointsssssss tbh this is the rest of my points sooooooooo

miv72 [106K]

Thank you and have a great day.

6 0

3 years ago

Read 2 more answers

4x + 12 = 12 one solution

Vsevolod [243]

Answer:

x=0

Step-by-step explanation:

4x+12=12

-12 -12

4x=0

4 4

x=0

7 0

4 years ago

Daria makes and sells stuffed toys. She uses special fabric to cover a foam cube to make a number cube. How much fabric did Dari

denis-greek [22]

Answer:294

Step-by-step explanation: you’re trying to find the surface area of the cube to find out how much material Daria needs. To do so find the area of 1 face of the cube (which is a square). The problem gives us 1 side of the square as 7cm. A square has the same length for its 4 sides, so to find the area of that 1 face do 7 x 7=49. The question also gives the hint that a cube has 6 faces so you would multiply the 49 by 6 to get the total surface area of the cube. 49 x 6=294.

Not sure if this is right but hope it helps.

8 0

3 years ago

Read 2 more answers