If four times the brother's age is subtracted from three times the sister's age, the difference is 8. Give an equation that repr
1 answer:
Answer:
Step-by-step explanation:
Let b is the age of the brother and s as the age of the sister.
It is given that if four times the brother's age is subtracted from three times the sister's age, the difference is 8.
We need to find an equation for the given statement.
Four times the brother's age = 4×b = 4b
Three times the sister's age = 3×s = 3s
Four times the brother's age is subtracted from three times the sister's age.
The difference is 8.
Therefore, the required equation is .
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Answer:
This statement can be made with a level of confidence of 97.72%.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 8.1 mm
Standard Deviation, σ = 0.5 mm
Sample size, n = 100
We are given that the distribution of thickness is a bell shaped distribution that is a normal distribution.
Formula:
Standard error due to sampling:
P(mean thickness is less than 8.2 mm)
P(x < 8.2)
Calculation the value from standard normal z table, we have,
This statement can be made with a level of confidence of 97.72%.
Answer:
The coast guard craft will get to the distressed boat the fastest.
Step-by-step explanation:
The coordinates of boat are (57,64).
The coordinates of rescue boat are (67,83).
The coordinates of coast guard craft are (65,46).
Both rescue crafts travel at the same rate. One of them will get to the distressed boat the faster, whose distance from the boat is least.
Distance formula:
The distance between boat and rescue boat is
The distance between boat and coast guard craft is
Since the distance between boat and coast guard craft is least, therefore coast guard craft will get to the distressed boat the fastest.