Need help pls I don’t really remember functions if anyone could pls help that would be great pls and thank you.

Mathematics

1 answer:

NikAS [45]2 years ago

4 0

The third one is not a function

because there is two different outputs (y values) for on input (x value). The X value 4, can’t have and input of 1 and 2

You might be interested in

Help me please I'll give brainliest to the first to answer

NARA [144]

Answer:

A i think ( Sorry if am wrong.)

Step-by-step explanation:

5 0

2 years ago

At Best Buy they have a stereo system that sells for $2200 and is on sale for 15% and sales tax is 7%. What is the final cost? (

Arte-miy333 [17]

Answer:

Final cost = $3070.90

Step-by-step explanation:

First we need to find the discount

Discount = original price * percent off

Discount = 2200 * .15

Discount = 330

Sale price = original price - discount

Sale price = 3200-330

Sale price = 2870

Now we need to calculate tax

Tax = sales price times tax rate

Tax = 2870 * .07

= 200.90

Final price = sales price plus tax

Final price = 2870 + 200.90

3070.90

6 0

3 years ago

Can anyone help me on this?

Ugo [173]

Answer:

$x = 1, -5$

Step-by-step explanation:

$f(x) = x^2 +4x - 5$

Factor the expression. Factoring is the process of writing out an expression by using other expressions such that when the other expression are multiplied together, the resulting expression is the initial expression.

$f(x)=x^2+4x-5$

$f(x)=(x+5)(x-1)$

Now set the expression equal to zero to find the roots (also known are zeros) of the expression. Use the zero product property to find the answers, the zero product property states that any number times zero is zero.

$0=(x+5)(x-1)\\$