2,563 Answered Questions for the topic Maths

05/14/20

Precalc question
The temperature in Gavin’s oven is a sinusoidal function of time. Gavin sets his oven so that it has a maximum temperature of 300F and a minimum temperature of 240F. Once the temperature... more
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05/14/20

finding the derivative of a specific equation

What is the derivative of N(t)=200te^(2-t)
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Maths

05/14/20

heeeeeeeeeelppp meeeeeeeeeeee
If (-2,1) is the midpoint of the line segment ST and the coordinates of S are (3,9), find the coordinates of T.
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05/13/20

Rationalise the denominator of 6 / sq.rt. 7 -2
Rationalise the denominator of 6 / √7 -2 Show your working clearly
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05/13/20

I answered the question but it says it is wrong.
you happen to notice that the 8% sales tax that your father paid on his new luxury boat came to $3,800. How much must the car itself have cost him?My answer for this question was: 3.518.18
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05/12/20

can someone tell me if my work its correct?
i got these totals.1. $83042. 8 and 120 lost
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05/12/20

Can x^4 be an upper bound for x^7 for a given constant, k ?
If k can be a constant so that: k•(x4) ≤ x7It would have to be for all n values (n being real values greater than zero)
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05/12/20

HELP MATHSWATCH
Sue has 18 sweets. Tony also has 18 sweets. She gives tony x sweets. Sue then eats 5 of her sweets. Tony then eats half of his sweets. Write expressions for the number of sweets Sue and Tony now have. more
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Maths Algebra 1

05/12/20

Math anything to help me
Four more than the product of three and a number x.
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05/12/20

Please solve this question......!
The following data give the numbers of new cars sold by Carpenters Motors Limited during a20-day sale. 8 5 12 3 9 10 6 12 8 8 4 16 10 11 7 7 3 5 9 11A.... more
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05/12/20

The following table shows the amount of caffeine in Alex's bloodstream at various times since he drank a cup of coffee. # of hours since he drank the coffee, t # of mg of caffeine in his bloodstream
The following table shows the amount of caffeine in Alex's bloodstream at various times since he drank a cup of coffee. # of hours since he drank the coffee, t # of mg of caffeine in his... more
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Maths Statistics

05/11/20

How to determine maximum likelihood estimator for this question
confused as to go about this question,it is asking to determine the MLE of this distrubtionf(x,θ ) N=3,X1..X2..X3(x^3) . (e^-x/θ) / 6θ^4where ^ = to the power of
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05/10/20

Please Help Me With These Two Way Tables For Math!!!
The two way table below shows the amount of time students spent studying for their Chemistry test and the grade they earned on the test. 0 - 50  51 - 70  71 - 90 91 - 100 Totals 0 - 1... more
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05/10/20

What is the probability that the student checks out a fiction or non-fiction book?
A student goes to the library. The probability that she checks out a fiction book is 0.45, a work of non-fiction book is 0.28, and both fiction and non-fiction book is 0.10. What is the probability... more
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05/10/20

What is the approximate probability that a randomly selected person will be attending the football game given they are an upper-class student? PLEASE HELP!
At Lewisville University, they are looking into how often students attend football games. Here are the results: ● ·45% of students regularly attend the football games ● Of those that attend... more
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05/10/20

College Algebra : Groups

For each of the following, let the operation ∗ be defined on Z by the given rule.Determine in each case whether Z is a group with respect to ∗ and whether it is an abelian group. State which, if... more
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05/09/20

Algebra: Groups
Question :Determine whether each of the following given sets is a group with respect to the indicated operation. Show your work.(b) The set E of all even integers with operation addition.My work... more
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05/08/20

The equation V(t) = 12,000(0.75)' represents the value of a motorcycle t years after it was purchased. Which statement is true?

The equation V(t) = 12,000(0.75)' represents the value of a motorcycle t years after it was purchased. Which statement is true? 1. The motorcycle cost $9000 when purchased. 2. The motorcycle cost... more
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05/08/20

Precalc question?
Nadia is a robot that can continuously adjust the length of its hair so that its length is a sinusoidal function of time. At its shortest, it's 6 cm long. At its longest, it's 24 cm long. Today,... more
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05/07/20

Trigonometry QUESTION THAT'S HARD TO SOLVE! Please HELP!
An 18-foot ribbon is attached to the top of a pole and is located on the ground 10 feet away from the base of the pole. Suppose Mateo has a second ribbon that will be located an additional 23 feet... more
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05/07/20

Please HELP! What distance does the boat need to travel on the surface of the ocean to be located directly above the fish? S
A fishing boat determines a pod of fish located in the ocean at an angle of depression of 25° from the current boat location. The fishing boat determines the distance through the ocean to the fish... more
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Maths

05/07/20

The sum of a number (n) and three is doubled. The result is 12. Write this information as an equation.
need help with this one, i dont understand
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Maths Statistics

05/06/20

Here is a list of eight integers 11 19 15 3 13 7 22 The value of x is three times the median of these eight integers.

(a) Find the median. (b) Work out the numerical value of the mean of the eight integers.
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05/05/20

High School Probability Math Question. It's so CONFUSING!
Each student in the Junior class was asked if they had to complete chores at home and if they had a curfew. The table represents the data. Yes Curfew No Curfew Totals Yes Chores 51 24 75 No... more
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Maths Algebra 1

05/04/20

Maths Question. (Question in description)
A car is driving from city a to city b at 60km/hr. if it were to drive at 100km/hr it would reach city b 10 minutes less than from driving at 60km/hr. What is the distance between the cities
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