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2 years ago

5

Choose all the numbers that are common multiples of 4 and 5.

2 answers:

densk [106]2 years ago

3 0

Answer:

40

Step-by-step explanation:

it would be 20 too but there is no opition for this i hope i helped

AnnZ [28]2 years ago

3 0

40, 60, and 80.
i hope this helps

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7. Which two equations are equivalent?

sineoko [7]

Answer:

C. $y=(x-3)^2$ and $y=x^2-6x+9$

Step-by-step explanation:

before answering the problem let us remind the formula for square of sum and differences

$(a+b)^2=a^2+2 \times a \times b + b^2$

$(a-b)^2=a^2-2 \times a \times b + b^2$

We are going to use the above two formulas to solve each part and come to an answer

A. $y = (x + 3)^2$

$(x + 3)^2=x^2+2 \times x \times 3 + 3^2$

$(x + 3)^2=x^2+6x+9$

Hence this option is not correct pair

B. $y = (x-5)^2$

$(x - 5)^2=x^2-2 \times x \times 5 + 5^2$

$(x -5)^2=x^2-10x+25$

Hence this option is also not correct pair

C. $y = (x -3)^2$

$(x - 3)^2=x^2-2 \times x \times 3 + 3^2$

$(x -3)^2=x^2-6x+9$

Hence this option is correct as it have equivalent pair

D. $y = (x + 5)^2$

$(x + 5)^2=x^2+2 \times x \times 5 + 5^2$

$(x + 5)^2=x^2+10x+25$

Hence this option is also not correct pair

6 0

3 years ago

What 2 numbers add up to get -1 and multiply to get -20

Dovator [93]

The two numbers that add up to get -1 and multiply to get -20 are -5 and 4
-5*4=-20
-5+4=-1
I hope this helps

3 0

2 years ago

Graph the linear equation and answer each of the following questions. y=-2x-3 (A)What is the y-intercept?

balandron [24]

A) The Y-intercept of this equation is 3

B) The slope of this equation is 2

C) This equation has a positive slope

D) Starting from the Y-intercept, I simply went over to the right 1 box, and up 2 boxes

I hope this helps!

5 0

2 years ago

If a + b + c = -6 and x + y = 5<br> what is 9y + 9x - 10a - 10c - 10b?

Finger [1]

If u tell me the solution's like are u evaluating or what, which method is it i can tell u the answer <span />

3 0

2 years ago

Which of the following is the solution set of x² + 8x + 12 = 0?

raketka [301]

Answer:

$\fbox{\begin{minipage}{9em}x = -2 and x = -6\end{minipage}}$

Step-by-step explanation:

Given:

$x^{2} + 8x + 12 = 0$

Solve for:

$x$

Solution:

Step 1: Select the formula to solve for $x$

There are some ways to solve quadratic equations.

One of the simple way (if possible) is performing the factorization.

Another way is using the quadratic formula.

Here, we are going to use factorization.

Step 2: Perform factorization

$x^{2} + 8x + 12 = 0$

<=> $x^{2} + 2x + 6x + 12 = 0$

<=> $(x^{2} + 2x) + (6x + 12) = 0$

<=> $x(x + 2) + 6(x + 2) = 0$

<=> $(x + 2)(x + 6) = 0$

<=> $x = -2$ or $x = -6$

Hope this helps!

:)

4 0

2 years ago