4/8 equals 1/2 because if u go down a number line and 4/8 will be in the middle so its 1/2 or u could divide bye 4
Given:
f(x) = 70n - 400 : equation for monthly profit.
n = number of students enrolled in the guitar class.
70 refers to the amount charged per student.
400 is the fixed expense made by the instructor.
For the instructor to have a profit, the product of 70n must be more than 400.
400/70 = 5.7 or 6
There must be at least 6 students enrolled in class for the instructor to generate profit.
f(x) = 70(6) - 400 = 420 - 400 = 20
1000 = 70n - 400
1000 + 400 = 70n
1400 = 70n
1400/70 = n
20 = n
There must be 20 students enrolled in class for the instructor to earn 1000 in profit.
1000 = 70(20) - 400
1000 = 1400 - 400
1000 = 1000
7. √9
√9 is a rational number because √9 = 3 = 3/1.
8. No, there is no integer between -6 and -7.
9. π
π is an irrational number
Answer:
- x³+3x²-6
Step-by-step explanation:
a - b means
b-a
x²-6-( x³ - 2x²)
Distribute the minus sign
x²-6 - x³ + 2x²
Combine like terms
- x³+3x²-6
Answer: $272
Step-by-step explanation:
Her amount due = 37,000(1.004)^273
If her monthly payment is x
She'll pay = x(1.004)^240 + x(1.004)^239 + ....x(1.004)^1 + x
= x[(1.004)^241 - 1]/(1.004-1) =
Her payment = Amount due
so
x[(1.004)^241 - 1]/(1.004-1) = 37000(1.004)^273
404x = 37000(1.004)^273 = 110029
x = 110029/404 = $272
Monthly payment = $272