Vincent is ordering accessories for his surfboard. A set of fins cost $24 each and a leash costs $15. The shipping cost is $4 pe
r order. The expression 24b + 15b + 4 can be used to find the cost in dollars of buying b fins and b leashes plus the cost of shipping.
1 answer:
Answer:
Here, b represents buying fins and leashes.
As per the statement:
Vincent is ordering accessories for his surfboard. A set of fins cost $24 each and a leash costs $15.
A set of fins cost $24 each and a leash costs $15
⇒ Cost of total fins = 24 b and Cost of total leashes = 15 b
It is also given that: The shipping cost is $4 per order.
then;
Cost in dollars of buying b fins and b leashes plus the cost of shipping
=
Therefore, the expression represents the cost in dollars of buying b fins and b leashes plus the cost of shipping.
10
(a)
True.
The given terms in the expressions are 24b, 10b and 4
(b)
True.
Like terms are those which have same variable.
Like terms in the given expression are: 24 b and 15 b
(c)
False.
Combine like terms in the given expression:
Therefore, the simplified given expression is,
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Answer:
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Subtracting (3) from 3 times (1), we have
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Answer:
a) The probability of a pregnancy lasting X days or longer is given by 1 subtracted by the p-value of , in which
is the mean and
is the standard deviation.
b) We have to find X when Z has a p-value of , and X is given by:
, in which
is the mean and
is the standard deviation.
Step-by-step explanation:
Normal Probability Distribution
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the z-score of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
In this question:
Mean , standard deviation
a. Find the probability of a pregnancy lasting X days or longer.
The probability of a pregnancy lasting X days or longer is given by 1 subtracted by the p-value of , in which
is the mean and
is the standard deviation.
b. If the length of pregnancy is in the lowest a%, then the baby is premature. Find the length that separates premature babies from those who are not premature.
We have to find X when Z has a p-value of , and X is given by:
, in which
is the mean and
is the standard deviation.