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2 years ago

Is (-1, -1) a solution to this system of equations? y = -8x - 9 y = -5x – 6 yes no

Mathematics

1 answer:

ollegr [7]2 years ago

8 0

Answer:

Yes

Step-by-step explanation:

To see is (-1, -1) is a solution to the system, we can plug it into the system to check:

-1 = -8(-1)-9

-1 = 8-9

-1 = -1

-1 = -5(-1)-6

-1 = 5-6

-1 = -1

Both of the equations are true, therefore (-1, -1) is a solution to the system.

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Solve and check: 3 x2 + 5x + 6 + x − 1 x + 2 = 7 x + 3

vagabundo [1.1K]

Answer:

3 $x^{2}$ -2x +5=0

Step-by-step explanation:

Combine liked terms:

3 $x^{2}$ +5x+x-1x+6+2=7x+3

3 $x^{2}$ +6x-1x+8=7x+3

3 $x^{2}$ +5x+8=7x+3

Subtract 3: 3 $x^{2}$ +5x+8-3=7x+3-3

3 $x^{2}$ +5x+5=7x

Now subtract 7x:

3 $x^{2}$ +5x+5-7x=7x-7x

If you want combine liked terms:

3 $x^{2}$ -7x+5x+5=0

3 $x^{2}$ -2x+5=0

Hope this helps!

5 0

3 years ago

An electronics store makes a profit of $72.00 for every television sold and $90.00 for every computer sold. The manager’s target

viktelen [127]

Answer:

<h2>Option A, C and D is the three possible solution.</h2>

Step-by-step explanation:

Each Television earns $72 and each Computer earns $90.

The manager’s target is to make at least $360.00 a day.

It is <u>not clarified the exact number of Televisions and Computers</u>.

Hence, as per the given condition, $72x + 90y \geq 360\\8x + 10y \geq 40\\4x + 5y \geq 20$ .

Now we just need to check the given options, whether they satisfy the above equation, or not.

Except the option B, each inequality indicates a value greater than 360.

Hence, option B can not be the possible solution.

4 0

3 years ago

Explain why each statement is true. 5 + 2 + 3 = 5 + (2 + 3)

Y_Kistochka [10]

Answer:

Associative property of addition. Grouping different addends does not change the sum.

Step-by-step explanation:

5 + 2 + 3 = 5 + (2 + 3)

10 = 5 + (5)

10 = 10

3 0

2 years ago

What is the distance between -789 and 989?

MrRa [10]

200

Hope it’s right
Best luck with your studying

8 0

3 years ago

Read 2 more answers

Jason has 60 toy cars 30% of the cars are blue how many cars are blue?<br><br> Please Show Work!!

Temka [501]

Answer:

Step-by-step explanation:

30%=.3

60*.3=18

30% of 60 =18

5 0

3 years ago