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3 years ago

I need help please and thank you

Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

5 0

This is a false statement.

When you are solving using square roots, you need to be aware that answers can be both positive and negative. When we solve this, you see there are two possible answers.

x^2 - 9 = 0

x^2 = 9

x = +/- 3

While 3 is an answer, so is -3. If we square either of those numbers, we get 9, which will satisfy the equation.

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It is not a function because both (2, 2) and (2,−2) have the same x-coordinate. It is a function because both (2, 2) and (2,−2)

olya-2409 [2.1K]

Answer:

It is not a function because both (2,2) and (2,-2) have the same x-coordinate.

Step-by-step explanation:

To be a function for the same x value there should NOT be two different y values.

So, in (2, 2) and (2,-2)

For the same x value 2, there are two different y values 2, -2.

So, this is not a function.

3 0

3 years ago

-45*5x+3x=666 A) -2 B) -3 C) 2 D) 3

Ivahew [28]

Answer: -3

Step-by-step explanation: Explanation is below

:) Hopes this helps!

3 0

3 years ago

7/7q+21= x /5q^2-45 then x=?

anzhelika [568]

Answer:

x = 5q - 15

Step-by-step explanation:

$\frac{7}{7q+21}=\frac{x}{5q^{2}-45}\\\\\frac{7}{7(q+3)}=\frac{x}{5 (q^{2} -9)}\\\\frac{1}{q+3}=\frac{x}{5*(q^{2}-3^{2})}\\\\\frac{1}{q+3}=\frac{x}{5(q+3)(q-3)}\\\\\frac{1}{q+3}*5*(q+3)(q-3)=x\\\\5(q-3)=x\\\\x= 5q-15$

3 0

2 years ago

Hellpppppppppppppppppp

Nikolay [14]

Answer:

9 + (-6)

Step-by-step explanation:

9-6=3

9 + (-6)= 3

Hope it will help you

3 0

2 years ago

Read 2 more answers

Which is zero of the polynomial expression 7x+21

swat32

Answer:

The zero is x = -3

Use the Rational Zero Theorem to list all possible rational zeros of the function.
Use synthetic division to evaluate a given possible zero by synthetically dividing the candidate into the polynomial.
Repeat step two using the quotient found with synthetic division.

Please Mark Brainliest If This Helped!

4 0

2 years ago

Read 2 more answers