Answer: x = 5, y = -1
<u>Step-by-step explanation:</u>
Equation 1: 4x + 2y = 18
Equation 2: 3x - 5y = 20
In order to eliminate one of the variables , find the LCM of either x or y.
<em>I chose to eliminate y.</em> The LCM of 2 & 5 is 10.
Multiply the entire equation so the coefficient of the variable equals the LCM.
Then add the equations and solve for the remaining variable.
5(4x + 2y = 18) --> 20x + 10y = 90
2(3x - 5y = 20) --> <u> 6x - 10y</u> = <u>40 </u>
26x = 130
<u> ÷26 </u> <u>÷26 </u>
x = 5
Next, input x = 5 into either of the equations to solve for y.
Equation 1: 4x + 2y = 18
4(5) + 2y = 18
20 + 2y = 18
<u> -20 </u> <u>-20 </u>
2y = -2
<u> ÷2 </u> <u> ÷2 </u>
y = -1
Answer:
x=35
y=72.5
Step-by-step explanation:
y=(180-35)/2
y=145/2
y=72.5
Answer:
y = 2x - 3.
Step-by-step explanation:
The perpendicular line will have slope - 1 / -1/2 = 2.
Using the point-slope form of the straight line:
y - y1 = m(x - x1)
Here m = 2 and (x1, y1) = (3, 3) so we have:
y -3 = 2(x - 3)
y = 2x - 6 + 3
y = 2x - 3.
Answer:
4.443664/2
Step-by-step explanation:
Mark me brainliest
The answer is 7x+21
Explanation: you have to distribute 7into c and three. So you would multiply 7 by x (or 1x) and 7 times 1 is 7 so it would be 7x and then you would multiply 7 times 3 which is 21 and there are no like terms with 7x and 21 so it’s just 7x+21
