How do you evaluate this expression
1 answer:
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We know that
• It takes 8 hours to travel a certain distance at 36 miles per hour.
,• At 60 miles per hour, how long would it take?
We solve this problem using the rule of three, or proportions. The image below shows the given relations.
We form the proportion. We have to write down 60 as numerator because it has an inverse relationship, that is, the more speed the least time needed.
<u>Answer:</u>
- Infinitely Many Solutions
<u>Step-by-step explanation:</u>
<u>Step-1: Re-write the equations into correct form.</u>
- => 6x + 3y = 24
y = -2x + 8
- => 6x - 24 = -3y
-2x + 8 = y
<u>Step-2: Multiply "-2x + 8 = y" by 3.</u>
- => 6x - 24 = -3y
-6x + 24 = 3y
<u>Step 3: Subtract or Add if needed</u>
- => 0 = 0
<u>Because we got a result 0 = 0, this means that the system has infinitely many solutions.</u>
Hoped this helped.
Answer:
The answer is in the explanation
Step-by-step explanation:
Mean value = = 438
(a) The data appeared to be centered towards 438.
There are little or no skew.
There is no outliers.
(b) yes
(c) standard deviation = s = 14.8955
95% confidence interval =
=
= (430.3415, 445.6585)
(d) Test statistic
t =
t = -3.3216
p -value is correctly given in option b.
No, 450 is not a plausible valaue.