One, you replace y with what y is equal too so 4x+3=x-6, 3x=-3 x=-1
x=-1
y=-1
Answer:
the answer is b
Step-by-step explanation:
Answer:
12ft
Step-by-step explanation:
Width of the rectangle:x
Length: x+4
Perimeter =2 x (width+length)
2(x+x+4)=40
2(2x+4)=40
2x+4=20
2x=16
x=8
Length:x+4=8+4=12ft
Answer:
(x, y) = (22, 35)
base angle theorem; angle sum theorem
Step-by-step explanation:
Base angles theorem:
Angles opposite congruent sides are congruent:
3x -11 = 2x +11
x = 22
__
Angle sum theorem:
The sum of angles in a triangle is 180°.
(3x -11)° +(2x +11)° +2y° = 180°
5x° +2y° = 180°
2y = 180 -5(22) . . . . . divide by °, subtract 5x, substitute for x
y = 35 . . . . . . . . . divide by 2
1.
x - 2y = -19
5x + 2y = 1 /+
6x = -18 / 6
x = -3
-3 - 2y = -19
-2y = -16. / ÷(-2)
y = 8
2.
3x + 4y = 18
-2x + 4y = 8 / ×(-1)
3x + 4y = 18
2x - 4y = -8 /+
5x = 10 / ÷5
x = 2
3 × 2 + 4y = 18
6 + 4y = 18 / -6
4y = 12 / ÷4
y = 3
3.
2x + y = 3
-x + 3y = -12 / ×2
2x + y = 3
-2x + 6y = -24 /+
7y = -21 / ÷7
y = -3
2x - 3 = 3 / +3
2x = 6 / ÷2
x = 3
Hit me up in comments if anything is unclear.
