A)
D+Y=50
D=Y+10
b)
Y+10+Y=50
2Y+10=50
2Y=40
Y=20
Therefore there are 20 in yearbook and 30 in drama.
To check our work:
D=Y+10
30=20+10
30=30 [CHECKS TRUE]
Answer:
Quadratic trinomial
Step-by-step explanation:
(8x^2 + 3x) - (12x^2 - 1)
= 8x^2 + 3x - 12x^2 + 1
= 8x^2 - 12x^2 + 3x + 1
= -4x^2 + 3x + 1
^ ^ ^
1 2 3
So the answer is Quadratic trinomial
Answer:
r^9/r^3 = r^9-3 = r^6
Step-by-step explanation:
Answer: (-3,-3)
Step-by-step explanation:
(3+-9)/2=-3
(1+-7)/2=-3
Decibel is directly proportional to number of cars passing the point. That is,
69 db ----- 139 cars
x db ----- 17 cars
x = number of cars passing the point per minute on a weekend.
Then,
x= (69*17)/139 = 8.43 db ≈ 8 db
