Answer:
Step-by-step explanation:
Let the width be X ft
Length = 2x - 40
Total area = 33,600 sq.ft
length * width = 33,600
(2x - 40) * x = 33,600
2x² - 40x -33600 = 0
Answer:
14,15,16
Step-by-step explanation:
a+a+1 +a+2=45
3a+3 =45
3a=45-3
3a=42
a=42:3 =14(the first number
14+1=15 (the second number
14+2=16 (the third number, the largest number
Answer:
s<30
Step-by-step explanation:
Less than means that we do not include 30
s = number of students
s<30
Answer:
D
Step-by-step explanation:
Given that f(x) has domain { 2, 4, 7 }
Substitute the values from the domain into f(x) for the range
f(2) = 2² - 5 = 4 - 5 = - 1
f(4) = 4² - 5 = 16 - 5 = 11
f(7) = 7² - 5 = 49 - 5 = 44
Thus the range is { - 1, 11, 44 } → D
Answer:
second
Step-by-step explanation:
Δ=3²-4*1*4=9-16=-7