Answer:
x=9, y=3
Step-by-step explanation:
-4x+6y=-18
y=-2x+21
-4x+6(-2x+21)=-18
-4x-12x+126=-18
144=16x
x=9
y=-2x+21
y=-18+21
y=3
Answer:
Option B is the true statement.
Step-by-step explanation:
The given quadratic equation is y = (-6x² + 100x - 180)
In this equation y represents the daily profit and x represents the selling price.
Now we will check every option given.
A. If the selling price per ball is $5 then profit will be
y = -6×25 + 100×5 - 180 = -150 + 500 - 180 = $170
Which never defines the number of balls sold, so option A. is not correct.
B. If the selling price is $8 then profit will be
y = -6×64 + 800 - 180 = -384 + 800 - 180 = $236
This option is correct.
C. This option is not valid because we can't use number of balls to find the profit.
D. This statement is also not correct as we can see if selling price of a ball is $5 then profit is $170 and when selling price is $12 then profit is $156.
Therefore this option is also not correct.
Option B is the answer.
T=number of hours she tutors.
r=number of hours she works a receptionist.
Tori is only able to work up to 20 hours per week.
t+r≤20
She tutors for $30 per hour and works as a receptionist for $10 per hour. She must earn at least $200 per week.
30t+10r≥200
Answer: t+r less than or equal to 20; 30t+10r greater than or queal to 200.
t+r≤20
30t+10r≥200
It’s c because the triangle is a isosceles triangle meaning both base angles are the same! So a triangle equals 180°. So you subtract 104 from 180. Then divide it by 2 since the base angles are the same
180-104= 76
76/2=38°
Answer: y2/10
Step-by-step explanation:
