Answer: Here are the correct answers:
Part A: 57.5 (feet) = 11.5 (ft/sec) * 5 (seconds)
Part B: 20 seconds
Step-by-step explanation:
<u>Part A: </u>
Using the equation y=kx
where y=distance, x=time, k=velocity
57.5 = k * 5
k = 57.5 / 5
k = 11.5 feet/second
57.5 (feet) = 11.5 (ft/sec) * 5 (seconds)
<u>Part B:</u>
Using the equation y=kx
where y=distance, x=time, k=velocity
230 = 11.5 * x
x = 230 / 11.5
x = 20 seconds
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Answer:
X=6,x=2
Step-by-step explanation:
X2-8x+12
So we will have to factorise
So let's solve
X2-8x+12
X2-6x-2x+12
X(x-6)-2(x-6)
(X-2)(x-6)
X-2=0
X=2
X-6=0
X=6
X=6 or x=2
Answer:
Hello your question is incomplete attached below is the missing part of the question
Regular Exercise
N
Mean Std Dev
Yes 35 48.5 12.5
No 120
56.9 11.9
answer : ( -12.968, -3.832 )
Step-by-step explanation:
To generate a 95% confidence interval
<u>first step :</u>
Assume population variance is equal we will calculate the number of degrees of freedom
df = n1 + n2 - 2 = 35 + 120 -2 = 153
<u>second step:</u>
Given : critical value = 0.05 , df = 153
hence Tc = 1.976
assuming the population variance is equal calculate pooled std as ( attached below )
Sp = 12.036
<u>third step :</u>
calculate the standard error
Se =
n1 = 35
n2 = 120
Sp = 12.036
hence Se = 2.312
<u>final step </u>
Compute the 95% confidence interval = ( -12.968, -3.832 )
attached below is the detailed solution
Answer:
86º
Step-by-step explanation:
If this is a trriangle the sum of the angles is 180º
180 - 45 - 49 = 86º
So starting with 9x + 4 ≤ 58, firstly subtract 4 on both sides:
Next, divide both sides by 9, and this inequality will be
Next with 1/6x - 2 > 3, firstly add 2 on both sides of the equation:
Next, multiply both sides by 6 and this inequality will be
Putting it all together, <u>x ≤ 6 OR x > 30.</u>