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3 years ago

Which relation is a function?

Mathematics

1 answer:

CaHeK987 [17]3 years ago

3 0

A function maps one input to one output, where x is the input and y is the output.

The input CANNOT BE REPEATED.

Which table shows this fact?

The only table that DOES NOT SHOW a repeated input is choice A.

Answer: choice A

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At the beginning of the month Kiran had $24 in his school cafeteria account. Use a variable to represent the unknown quantity in

Korolek [52]

Answer: 8, 20, -6, 6

Step-by-step explanation:

1. you need to to subtract 24-16=8

2. then you subtract 28-8=20

3. Then you subtract 28-34= -6

4. At the end you just put in 6!

Have a great day!

4 0

3 years ago

Rewrite 9 to the 3rd power divided by 9 to the 9th power using a single, positive exponent

Brums [2.3K]

Answer:

$\dfrac{1}{9^6}$

Step-by-step explanation:

$\dfrac{9^3}{9^9} = 9^{3 - 9} = 9^{-6} = \dfrac{1}{9^6}$

8 0

2 years ago

8 to power -2 multiplied by a to power of 7

levacccp [35]

(8^ -2)(4^4)(16^ -1)


a^-x=(1/a^x)


 (4^4)/((8^2)(16))

"NOTE" 16^1=16


4^4=256

8^2=64

256/((64)(16))=1/4

convert 1/4 to a power of two

(4) is 2

1/4=1/(2^2)

1^2=1

(1/2)^2=(1/4)


1/2 to the power of 2 is the answer

It would look like this

1/2²

8 0

3 years ago

A satellite camera takes a rectangular-shaped picture. The smallest region that can be photographed is a 4-km by 4-km rectangle.

Lesechka [4]

So we know that the formula for the area of a rectangle is $A = lw$ .
Now both the length and width of the rectangle increase at 3 km/s, therefore, $A(t) = (3t+l)*(3t+w). Since the initial length = initial width = 4 km, then the initial area = 16 [tex]km^2$ . We want to know the time when the area is four times its original area, therefore, our new formula is: $4A(t) = (3t+l)*(3t+w)$ . Plugging in our known values we have:

$64 [km^2] = (3t + 4 [km])*(3t + 4 [km])$
$t = \frac{4}{3} s$

The area is four times its original area after \frac{4}{3} s[/tex].

6 0

4 years ago

Which can be represented by the expression 17 – 2x? A. 17 less than twice a number B. the difference between 17 and twice a numb

Mashcka [7]

Answer:

Step-by-step explanation:

If x is a number, then twice a number is 2x. The difference between 17 and 2x is 17-2x.

Common Error:

A. says 17 less than twice a number. Since it is 17 less, it is 2x-17 not 17-2x.

Hope this answer helped! :)

5 0

3 years ago