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Darya [45]
3 years ago
5

I need major help cause I'm confused

Mathematics
1 answer:
diamong [38]3 years ago
8 0

9514 1404 393

Answer:

  x = -2

Step-by-step explanation:

The tables show that the point (-2, -1) is on the graphs of both functions.

The x-value of that point is -2.

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3x+9y=12 <br>-3x-6y=18 <br>Solve the system by using elimination​
Ivenika [448]

Answer:  (x, y) = (-26, 10)

This means x = -26 and y = 10 pair up together

===============================================================

How to get that answer:

Add the equations straight down. Think of having 3 separate columns for the three different like terms.

  • 3x + (-3x) becomes 0x and that's just 0. So the x terms go away
  • 9y + (-6y) is the same as 9y-6y which turns into 3y
  • 12 + 18 becomes 30

After all that, we're left with the simpler equation 3y = 30. That solves to y = 10 after dividing both sides by 3.

Plug this back into any equation involving x and y. Solve for x

3x+9y = 12

3x+9(10) = 12

3x+90 = 12

3x = 12-90

3x = -78

x = -78/3

x = -26

We have found that x = -26 and y = 10 pair up together to form the solution.

-------------------

Checking the answer:

Plug (x,y) = (-26, 10) into the first equation

3x+9y = 12

3(-26)+9(10) = 12

-78+90 = 12

12 = 12

We get a true equation since the same thing is on both sides.

Repeat the same idea for the second equation

-3x-6y = 18

-3(-26) - 6(10) = 18

78 - 60 = 18

18 = 18

The second equation is true as well.

Both equations are true, so the solution (x, y) = (-26, 10) is confirmed.

8 0
3 years ago
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Miguel has a ladder with legs of equal length. He opened the ladder and placed it on the floor. What type of triangle is formed
Paha777 [63]

Answer:

<em>it's an isosceles triangle, because two sides are the same length, and thus two angles are also the same.</em>

<em> * mark as brainliest please../;(</em>

<em />

Step-by-step explanation:

8 0
4 years ago
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Use appropriate tools . How can you use a graph to determine that a relationship is not a function ?
sergey [27]

Answer:

by showing dots and correlations in a graph which will have an estimated slope, while not a definite one

Step-by-step explanation:

8 0
3 years ago
PLS HELp! WILL MARK BRAINLIEST!! NEED HELP W BOX AND WHISKER PLOTS!
harina [27]

Answer:

1) Female

2) Male

Step-by-step explanation:

8 0
3 years ago
A combination lock has 3 dials. The first 2 dials have a setting for digits 0 through 9, and the third has settings for all 26 l
NeTakaya

Answer:

There is 2600 combinations possible.

Step-by-step explanation:

The combinations for the first lock has 10 combinations

The combinations for the second lock has 10 combinations

The combinations for the third lock has 26 combinations

The total combinations is the product of all the locks.

There is 2600 combinations possible.

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