Hello Tabby
We need to solve 4x+2y= 10 for x
Let's start by adding -2y to both sides
4x+2y-2y= 10-2y
4x = -2y+10
X= (-2y+10)/4
X= -1/2 y + 5/2
Now substitute -1/2 y +5/2 for x in 3x+2y=6
3( -1/2 y +5/2) +2y = 6
1/2 y + 15/2 = 6
Add -15/2 to both sides
1/2 y +15/2 -15/2 = 6-15/2
1/2 y = -3/2
Y = -3/2/1/2
Y= -3
Now substitute -3 for y in x = -1/2 y +5/2
X= -1/2 y + 5/2
X = -1/2 (-3)+5/2
X = 3/2 + 5/2
X= (3+5)/2
X=8/2
X= 4
Answer x= 4 and y= -3
I hope that's help and please if you have question feel free to ask me :)
Answer:
Step-by-step explanation:
6A) Death Valley is located below sea level. It says it is -282 feet. This means that it is below 0 and sea level is marked at 0.
6B) 5280 + 282 = 5562 ft higher
6C) The closer you get to the ocean the closer you are to 0. If you were in the water floating on top you would be at 0.
13) all 3 are 28
The parenthesis have to stay. This is how we know to distrubute the 2 across the problem.
Nope- false
The sum of the square roots of two sides of a _right_ triangle is equal to the hypotenuse.
Answer:
You need to show a graph so we can calculate the problem.
Step-by-step explanation:
Answer:
Does exist -- It only exists when the determinant does not equal zero.
Step-by-step explanation:
The inverse of a matrix is the transpose of the cofactor matrix, divided by the determinant. If the determinant is zero, the result of the division is undefined and the inverse does not exist.
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For this matrix, the determinant is (-2)(18) -(9)(4) = -72. The inverse exists.
