Which is a solution to the equation? (x −2)(x + 5) = 18 x = −10 x = −7 x = −4 x = −2
1 answer:
You might be interested in
Answer:
98% confidence interval is (-0.105 , 0.265)
Step-by-step explanation:
n1 = 75 n2 = 75
X1 = 48 X2 = 42
P1 = X1/N1 = 0.64 P2 = X2/N2 = 0.56
98% confidence interval for difference between two proportions is :
P1 - P2 <u>+</u> Z
= 0.08 <u>+</u> 0.185
= (-0.105 , 0.265)
98% confidence interval is (-0.105 , 0.265)
Answer:
The time taken from start to finish is 48 minutes.
Step-by-step explanation:
Given : When they are both racing on hoverboards, Victoria is 3 times as fast as her brother Max. When she is on foot, she is 3 times slower than Max on his hoverboard. They took off on hoverboards at the same time, but after 12 minutes, Victoria’s hoverboard broke and she immediately started to run.
To find : How long, in minutes, did it last from start to finish?
Solution :
Distance = Speed × Time
Let the speed of Max = s
Time taken = t
At 12 minutes,
Distance covered by Max =
Victoria is 3 times as fast as her brother Max.
Distance covered by Victoria =
After 12 minutes,
Victoria’s hoverboard broke and she immediately started to run.
When Victoria is on foot, she is 3 times slower than Max on his hoverboard.
Distance covered by Max =
Distance covered by Victoria =
Since the race was a tie, then
Total distance of Max = Total distance of Victoria
The time taken from start to finish is 48 minutes.