3x²+5x=2
x(3x+5)=2
x=2 or 3x+5=2
x=3/5
Answer:
58
Step-by-step explanation:
the mean is adding up all the numbers, then dividing by the amount of the numbers.
add up all the numbers:
13 + 13 + 14 + 18 + 22 = 80
the mean is 23.
so you need to back track:
23 * 6 = 138
138 - 80 = 58
Answer:
-4
Step-by-step explanation:
- y = 3(x+5)²-4
- y= 3(x²+10x+25)-4
- y= 3x²+30x+75-4
- y= 3x²+30x+71
Derivate the function
solve the equation y'= 0
- y'= 6x+30
- 6x+30= 0
- 6x= -30
- x = -5
The extrme value of y is reached in -5
y = 3(-5+5)²-4= -4
Length (L): 3w + 8
width (w): w
Perimeter (P) = 2L + 2w
128 = 2(3w + 8) + 2(w)
128 = 6w + 16 + 2w
128 = 8w + 16
112 = 8w
14 = w
Length (L): 3w + 8 = 3(14) + 8 = 42 + 8 = 50
Answer: width = 14 inches, length = 50 inches