$MathMaster logo$

MathMaster

Home
general
a b c 57 b a 6 d 3 4a d b c

Question

{a+b+c=57 {b-a=6 {d=3/4a {d+b =c

159

likes

794 views

Answer to a math question {a+b+c=57 {b-a=6 {d=3/4a {d+b =c

$Expert avatar$

4.5

119 Answers

a=12, b=18, c=27, d=9.

Frequently asked questions (FAQs)

Math question: Find the absolute maximum and minimum values of the function f(x) = 2x^3 - 9x^2 + 12x on the interval [-2, 4].

+

Question: What is the conjugate of the complex number 3 + 4i?

+

What is the measure of the angle formed by the angle bisector, if one of the angles formed is 60 degrees?

+

New questions in Mathematics

A circle with a 12-inch diameter is folded in half and then folded in half again. What is the area of the resulting shape?

If you have a bag with 18 white balls and 2 black balls. What is the probability of drawing a white ball? And extracting a black one?

The time it takes for a person to travel 300 m is 15 minutes. What is their speed in meters per second?

Use the digits of 1,9,2,3 to come up with all the numbers 98 and 95

A hotel in the Algarve had to offer 1 week of vacation to one of its employees as an Easter gift in a random choice. It is known that 80 people work in this hotel, 41 of whom are Portuguese and 39 are foreign nationals. There are 14 Portuguese men and 23 foreign women. Using what you know about conditional probability, check the probability that the gift was offered to a Portuguese citizen, knowing that it was a woman.

Find the derivatives for y=X+1/X-1

There were no defectives in a sample of 1 light bulb does this sample provide sufficient evidence that in the warehouse with millions of light bulbs fewer than 10% are defective?

6-35 A recent study by an environmental watchdog determined that the amount of contaminants in Minnesota lakes (in parts per million) it has a normal distribution with a mean of 64 ppm and variance of 17.6. Assume that 35 lakes are randomly selected and sampled. Find the probability that the sample average of the amount of contaminants is a) Greater than 72 ppm. b) Between 64 and 72 ppm. c) Exactly 64 ppm. d) Greater than 94 ppm.

The price per night of a suite at the Baglioni Hotel in Venice is 1896 euros, VAT included. The VAT in Italy is 25%. The hotel gets a return of 10% out of the price VAT included. b) What is the profit value made by the hotel for one

Find the center coordinates and radius of a circle for an equation written as: 3x2 + 3y2 - 6y = —12× + 24

A car travels 211 miles on 15 gallons of gasoline. The best estimate of the car’s miles per gallon is?

7.57 Online communication. A study suggests that the average college student spends 10 hours per week communicating with others online. You believe that this is an underestimate and decide to collect your own sample for a hypothesis test. You randomly sample 60 students from your dorm and find that on average they spent 13.5 hours a week communicating with others online. A friend of yours, who offers to help you with the hypothesis test, comes up with the following set of hypotheses. Indicate any errors you see. H0 :x ̄<10hours HA : x ̄ > 13.5 hours

Translate to an equation and solve. Let x be the unknown number: What number is 52% of 81.

In poker, a full house consists of five cards, where two of the cards have the same number (or letter) and the remaining three also have the same number (or letter) as each other (but not as the previous two cards). Use a search engine or Wikipedia to understand the concept better if necessary. In how many different ways can one obtain a full house?

Calculate NPV, IRR and PAYBACK through a cash flow for a period of five years, with discount rate of: a) 10% b) 12% c) 15% initial annual cost $41,400,000

Select a variable and collect at least 50 data values. For example, you may ask the students in the college how many hours they study per week or how old they are, etc. a. Explain what your target population was. b. State how the sample was selected. c. Summarise the data by using a frequency table. d. Calculate all the descriptive measures for the data and describe the data set using the measures. e. Present the data in an appropriate way. f. Write a paragraph summarizing the data.

question 1 Consider a sample space S, and two events A and B such that P(A ∩ B) = 0.2, P(A ∪ B) = 0.6, P(B ∪ ̄A) = 0.8 (a) [0.5 points] Calculate P (A). (b) [0.5 points] Calculate P (B)

f(r) = 1/r+9 find f(x^2) + 1

To apply a diagnostic test, in how many ways can 14 students be chosen out of 25? if the order does not matter