A rectangle has a width of 5 cm and a length of 10 cm. If the width is increased by 3, how does the perimeter change?
2 answers:
Answer:
The perimeter changed by 6 cm.
Step-by-step explanation:
A rectangle has a width of 5 cm and a length of 10 cm.
The perimeter is = 2(length+width)
Perimeter =
=
= 30 cm
When the width is increased by 3, and lets assume that the length is same .
So, length is 10 cm and width is 8 cm.
Perimeter =
=
= 36 cm
Change in perimeter = cm
So, the perimeter changed by 6 cm.
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Answer:
a) 0.71
b) 0.9863
Step-by-step explanation:
a. Given the mean prices of a house is $403,000 and the standard deviation is $278,000
-The probability the probability that the selected house is valued at less than $500,000 is obtained by summing the frequencies of prices below $500,000:
Hence, the probability of a house price below $500,000 is 0.71
b. -Let X be the mean price of a randomly selected house.
-Since the sample size 40 is greater than 30, we assume normal distribution.
-The probability can therefore be calculated as follows:
Thus, the probability that the mean value of the 40 houses is less than $500,000 is 0.9863
Right format of question:
Plot two points that are 7 units from Point D and also share the same x-coordinate as Point D.
Answer:
and
Step-by-step explanation:
Given
Required
Determine a point 7 points from D and in the same x coordinate
Represent this point with D'.
From the requirement of the question, D' has two possible values and these values are:
----> 7 units down and
----> 7 units up
Substitute values for x and y in and
So, we have:
