3√10 + 7√15 - 6√10 - 4√15
3√10 - 6√10 + 7√15 - 4√15
-3√10 + 3√15
The answer is B.
Answer:
<h2>
x = 85° </h2>
Step-by-step explanation:
m∠ADC = 180° - 95° {a straight angle}
m∠ABC = 180° - x {a straight angle}
m∠ADC + m∠ABC = 180° {a quadrilateral inscribed in a circle}
180 - 95° + 180 - x = 180°
85° - x = 0
<u>x = 85° </u>
2x + y = 20
y = 20 - 2x
Substitute into second equation:
6x - 5(20-2x) = 12
6x -100 +10x = 12
16x = 112
x = 7
Plug back into first equation:
2(7) + y = 20
14 +y = 20
y = 6
Answer is x = 7 and y = 6
Answer:
Student ticket cost $11
Adult ticket cost $12
Step-by-step explanation:
Let number of student ticket be x and adult ticket be y
3x+3y=69
5x+3y=91
Subtract above equation you get
-2x=-22
x=11
Since 3x+3y=69 will
x+y=23 by dividing throughout by 3
y=12
