Ask question

Ask question

All categories

3 years ago

10

1. The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2.

1 answer:

Nastasia [14]3 years ago

5 0

1: (-1,-1) is (x, y) to see if it is a solution, you would just plug in x and y and see if the equation is true.
-4 (-1) + 2(-1) = 2
4 + -2 = 2
2 = 2 CORRECT
So... plug in x and y in the second equation to Make sure it works for that one too.
-1 + -1 = -2
-2 = -2 CORRECT
So, yes. (-1,-1) is a solution to both equations.

You might be interested in

Number 15 really need help

Leokris [45]

$9 a day for 8 days.

So, for every day that went by they earned $9. In other words the answer is the Amount of Money Earned per day multiplied by the number of days!

So!

$9 * 8days

Or you can also think of it as this:
9+9+9+9+9+9+9+9

Our answer comes out to be 72!

8 0

3 years ago

Read 2 more answers

For any circle, which ratio is equal to the number n? Select all that apply. Plsss help me!!

barxatty [35]

Answer:

Options A-C-F

Step-by-step explanation:

we know that

<em>The circumference of a circle is equal to</em>

$C=\pi D$ or $C=2\pi r$

where

D is the diameter and r is the radius

therefore

$\pi =\frac{C}{D}$ or $\pi =\frac{C}{2r}$

The number pi is the ratio circumference - diameter or is the ratio circumference - 2 times radius

<em>The area of the circle is equal to</em>

$A=\pi r^{2}$

therefore

The number pi is the ratio Area - radius squared

6 0

3 years ago

Hector gave of his money and an additional $1 to Calista. He

trapecia [35]

I think it’s $34 but i’m not sure

6 0

3 years ago

Read 2 more answers

At midnight, the temperature was -8oF. At noon, the temperature was 23oF. Which expression represents the increase in temperatur

irinina [24]

Answer:

$23^oF-(-8^oF)$

Step-by-step explanation:

We have been given that at midnight, the temperature was $-8^oF$ . At noon, the temperature was $23^oF$ .

Since our temperature has increased to 23 degree Fahrenheit from -8 degree Fahrenheit, we can represent this increase in temperature as:

$\text{The increase in temperature}=23^oF-(-8^oF)$

Therefore, the expression $23^oF-(-8^oF)$ represents the increase in temperature.

6 0

3 years ago

Read 2 more answers

Fill in the answer that completes the square. Then write the trinomial in factored form.

JulijaS [17]

X+6 is the answer to the question.

3 0

3 years ago