Answer:
<u>The average speed of the frightened dot was 13 units per minute.</u>
Step-by-step explanation:
Let's find out the distance covered by the frightened dot, as follows:
Distance = (Distance from - 5 to 0) + (Distance from 0 to 34)
Distance = 5 + 34
Distance = 39
Now, let's find out the average speed of the dot, this way:
Average speed = Distance/Time
Average speed = 39/3
<u>Average speed = 13 units per minute</u>
Answer:
The tea's actual cost is $116.25
Step-by-step explanation:
* Lets revise how to find the z-score
- The rule the z-score is z = (x - μ)/σ , where
# x is the score
# μ is the mean
# σ is the standard deviation
* Lets solve the problem
- The average cost of a glass of iced tea is $1.25
- The standard deviation of it is 7 cents
- A new restaurant charges a price for iced tea that has a
z-value of -1.25
* Lets change the average cost to cent
∵ $1 = 100 cents
∴ The average cost of a glass of iced tea = 1.25 × 100 = 125 cents
∵ z = (x - μ)/σ
∵ z = -1.25
∵ μ = 125
∵ σ = 7
∴ -1.25 = (x - 125)/7 ⇒ multiply both sides by 7
∴ -8.75 = x - 125 ⇒ add 125 to both sides
∴ 116.25 = x
* The tea's actual cost is $116.25
9y+7=2y+98
9y-2y=98-7
7y=91 /:7
y=13
(9y+7)°=(9·13+7)°=(117+7)°=124°
Is there a question...or...?
Answer:
B) y=-3/2x-3
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-6-3)/(2-(-4))
m=-9/(2+4)
m=-9/6
simplify
m=-3/2
y-y1=m(x-x1)
y-3=-3/2(x-(-4))
y-3=-3/2(x+4)
y=-3/2x-12/2+3
y=-3/2x-6+3
y=-3/2x-3
