Answer:
A. The curve is a parabola with a vertex at (3,-4) and is traced from left to right for increasing values of t.
Step-by-step explanation:
x = 3 + t
y = t² − 4
Eliminating the parameter:
t = x − 3
y = (x − 3)² − 4
This is an upwards parabola with a vertex at (3, -4).
x = 3 + t, so as t increases, x increases.
So the curve is traced from left to right.
(13•4) + (3•8) +3 = 79
The total cost is $79
In statistical methods, the significance level is a value that is used as a criterion for rejecting a null hypothesis. It used by first looking at the differences between the experimental results and from there the null hypothesis would be determined. Then, we assume that the null hypothesis is true, the probability of the differences is computed by using statistical tools. If the computed probability is less than or equal to the value of the significance level, then you conclude that the null hypothesis should be rejected and that the results are statistically significant. Usually, a significance level of 1% or 5% is used.
Answer:
97/113
Step-by-step explanation:
67 robots have legs only, 21 have wheels only, and 9 have both legs and wheels. The total number of robots with legs and/or wheels is 97.
The probability is 97/113.
Answer
42
Explanation
Let’s say:
Set of envelopes: {a,b,c,d,e,f,g}
Set of postage stamps: {1,2,3,4,5,6}
For an envelope you can have:
1a 2a 3a 4a 5a 6a (6 different combinations)
This applies to all 7 different types of envelopes.
Therefore 7 • 6 = 42