substitute y = 3x-12 into -4x + 3y = -11
-4x +3 (3x-12) = -11
distribute
-4x +9x-36 = -11
combine like terms
5x - 36 = -11
add 36 to each side
5x = 25
divide each side by 4
x = 5
noe we need to find y
y = 3x -12
y = 3(5) -12
= 15 -12
y = 3
answer (5,3)
The answer to the question
Answer:
43
Step-by-step explanation:
Answer:
cos 45 degree = A/H
cos 45 degree = 2 square root 2 / x
x = 2 square root 2 / cos 45 degree
x = 4
Sin 45 degree = O/H
Sin 45 degree = y/ 4
4 x Sin 45 degree = y
y = 2.83
or
we could use tan
tan 45 degree = O/A
tan 45 degree = y / 2 square root 2
2 square root 2 x tan 45 degree = y
y = 2.83
i hope this would elp a little bit.
Step-by-step explanation:
- Diagonals are congruent.
- Diagonals bisect angles.
- Diagonals are perpendicular.
- Diagonals bisect each other.