These lines are perpendicular
because if you graph them they intersect and form right angles.
another way you know that they are perpendicular is reciprocal slopes
meaning they are totally opposite or (flipped)
Answer:
scalene
Step-by-step explanation:
12.5, 4.4, and 11.72 are all different measurements
i hope this helped
Answer I tried to find the answer but all i got was negative one. sorry i couldn't help a lot
Step-by-step explanation
Answer:
142
Step-by-step explanation:
The line underneath the straight angle is a straight line, meaning it is 180 degrees. <em>180-38= 142</em>
Answer:
x=5
y=−1
Step-by-step explanation:
x+y=4
2x−5y=15
In order to solve by elimination, coefficients of one of the variables must be the same in both equations so that the variable will cancel out when one equation is subtracted from the other.
x+y=4,2x−5y=15
To make x and 2x equal, multiply all terms on each side of the first equation by 2 and all terms on each side of the second by 1.
2x+2y=2×4,2x−5y=15
Simplify.
2x+2y=8,2x−5y=15
Subtract 2x−5y=15 from 2x+2y=8 by subtracting like terms on each side of the equal sign.
2x−2x+2y+5y=8−15
Add 2x to −2x. Terms 2x and −2x cancel out, leaving an equation with only one variable that can be solved.
2y+5y=8−15
Add 2y to 5y.
7y=8−15
Add 8 to −15.
7y=−7
Divide both sides by 7.
y=−1
Substitute −1 for y in 2x−5y=15. Because the resulting equation contains only one variable, you can solve for x directly.
2x−5(−1)=15
Multiply −5 times −1.
2x+5=15
Subtract 5 from both sides of the equation.
2x=10
Divide both sides by 2.
x=5
The system is now solved.
x=5,y=−1