Answer:
x = 0, y = 7
Step-by-step explanation:
Solving a system of equations using substitution requires one side to be equal to a variable present in the equation, in this case x or y. We should simplify the equation using elimination before substituting to reduce the chance of error.
In order to use the elimination method, you have to create variables that have the same coefficient—then you can eliminate them. These equations arew already aligned for us.
3x - 10y=-70
-<u> 4x +9y = 63</u>
-x + y = 7
Now, for substitution, the equation must be set to a variable.
-x + y = 7
y = x + 7
Next, plug the equation in where applicable in another equation.
4x +9(x + 7) = 63
4x + 9x + 63 = 63
13x = 0
x = 0
The final step of substitution is to plug the known variable into an equation to find the other variable.
3(0) - 10y=-70
0 - 10y = -70
10y = 70
y = 7
I guarantee you this answer is correct, I worked it out using other methods and graphing prior to submitting this answer.
Answer:
a screw is a simple machine that works as a modified inclined plane. You can think of the thread of the screw as an inclined plane wrapped around the shaft of the screw. The slope of the screw is the distance for one complete rotation while the height of the inclined plane is the distance between the threads, known as pitch. The relationship between the pitch and circumference of the screw gives the mechanical advantage.
Answer:
The angle will be 130 degrees
Step-by-step explanation:
50 at the center translates to 50 at the outer rim.
this means it will be 310-50 divided by 2
260 divided by 2 equals 130
The answer is c! As CBA & ZXY is not only a full triangle, but its written incorrectly.
ABC → CBA
XYZ → ZYX (not ZXY)
Answer:
0
Step-by-step explanation:
Graph Rate of Change:
(0,1) (1,3)
= 
= 2
Table Rate of Change:
(5,13) (7,17)
= 
= = 2
2 - 2 = 0
