Answer:
12x+20
Step-by-step explanation:
Perimeter of a garden = 4s, s being the length of the side
In this case, s = 3x+5
substitute the equation
4(3x+5)
=12x+20
This is the answer to your question
Answer:
a) 0.3495
b) (9.65, 10.35)
Step-by-step explanation:
We are given the following in the question:
Sample mean, = 10 hours
Sample size, n = 64
Alpha, α = 0.02
Population standard deviation, σ = 1.2 hours
a) Margin of error
Formula
Putting values, we get,
b) the sample mean is 10 hours, then the 98% confidence interval
Putting the values, we get,
X = Nick's age
y = Sara's age
Nick is 8 years older than Sara, therefore
y = x - 8
A graph of y versus x is shown below.
Round to the nearest tens. 52 = 50 and 39 = 40
50 + 40 = 90 Simply add and that is the estimate of the sum 52 + 39