Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 1079669: A rectangular piece of tin measuring 50 cm x 40 cm has squares cut out of each corner. If the area of the remaining tin is 875 cm^2, find the length of the side of the square removed from each corner (to the nearest tenth).
Click here to see answer by jorel1380(3719)   |
Question 1079804: David knew he made a mistake when he calculated that Gilda walks 123 miles to the station. Read through David's calculations:
Using d = rt, the distance is the same, but the rate and time are different.
If Gilda misses the train, it means the time t needs 7 more minutes at a rate of 3 mph, so d = 3(t + 7).
If she gets to the station 5 minutes early it means the time t can be 5 minutes less at a rate of 4 mph so d = 4(t - 5).
3(t + 7) = 4(t - 5)
3t + 21 = 4t - 20
t = 41
d = rt, so d = 3(41) = 123
Find David's mistake in his calculations. In two or more complete sentences, explain his mistake. Include the correct calculations and solutions in your answer.
Click here to see answer by MathLover1(20849)  |
Question 1079802: Brandon says to get that shade of green, 6 pints of yellow paint need to be added to the bucket. Bianca says that won't work. In two or more complete sentences, explain who is correct and why. In your explanation, include the calculations to support the correct answer.
Click here to see answer by Boreal(15235)  |
Question 1079802: Brandon says to get that shade of green, 6 pints of yellow paint need to be added to the bucket. Bianca says that won't work. In two or more complete sentences, explain who is correct and why. In your explanation, include the calculations to support the correct answer.
Click here to see answer by rapture(86)  |
Question 1079803: Caitlin says the difference in their ages is 24 years. In two or more complete sentences, explain whether or not Caitlin is correct. In your explanation, include the equations and calculations necessary to support or contradict Caitlin's answer.
Click here to see answer by ikleyn(52775)  |
Question 1080018: Write the word that the number 32 33 represents. From this word, take out the opposite of the word that means you get three strikes in baseball. Now unscramble the remaining letters to get what 12 is to 108 or 7 is to 49. What is the word we began with? What is the word we ended with?
The beginning word is _______________________________.
The ending word is __________________________________.
Click here to see answer by ikleyn(52775) |
Question 1080031: First, find the solution to the system of equations 𝑦 = −3𝑥 − 7 and −5𝑥 − 8𝑦 = −115. Next, take the sum of the two values found in this solution. Write out this resulting sum as a word (original). The last letter of this word is the third letter of a new word. In the new word, the letter in the alphabet that precedes the third letter of the new word appears three times in the new word. (This includes the first letter of the new word.) Just like the original word, the new word has three vowels. Both words have vowels appearing every other letter and two of the vowels in the new word are the same. Now, use the list of numbers {413, 314, 143, 431, 134, 341} to determine what number fits the new word appropriately.
The original word is _________________________.
The new word is ____________________________.
The number that fits appropriately is _____________________.
Click here to see answer by ikleyn(52775) |
Question 1079995: Suppose that the cost function for the production of a particular item is given by the equation C(x) = 2x2– 320x + 12,020, where x represents the number of items. How many items should be produced to minimize the cost?
I want someone to teach me how to do this question. Thanks!!
Click here to see answer by ikleyn(52775) |
Question 1080025: Write down the type of function described by the equation 4𝑥 − 9𝑦 = 72. Now add the seventh letter of the alphabet and the letter after the nineteenth letter of the alphabet to the end of this type of function. Unscramble the letters to get a closed figure. Write the word we began with and then draw and label the closed figure described by the word at the end.
The beginning word is ____________________________________.
Click here to see answer by Alan3354(69443)  |
Question 1080195: I dont understand whats a half life? How do i get this answer?
The amount of carbon 14 in a given organism at the time of that organism’s death (time zero) is 100%.
The half-life of carbon 14 is 5750 years, which means only 50% of the original carbon 14 will remain in
the given object 5750 years later. How old is an object that is found to contain only 20% of its original
carbon 14, to the nearest ten years?
Click here to see answer by rothauserc(4718)  |
Question 1080262: There are 4 pints of green paint in a gallon bucket. The paint is made from equal amounts of yellow paint and blue paint. To create a different shade of green, the mixture needs to be 80% yellow. How many pints of yellow paint need to be added to the bucket to make the mixture 80% yellow?
Brandon says to get that shade of green, 6 pints of yellow paint need to be added to the bucket. Bianca says that won't work. In two or more complete sentences, explain who is correct and why. In your explanation, include the calculations to support the correct answer.
Click here to see answer by josmiceli(19441)  |
Question 1080263: The ratio of the ages of Mandy and Sandy is 2:5. After 8 years, their ages will be in the ratio 1:2. What is the difference between their present ages?
Caitlin says the difference in their ages is 24 years. In two or more complete sentences, explain whether or not Caitlin is correct. In your explanation, include the equations and calculations necessary to support or contradict Caitlin's answer.
Click here to see answer by josgarithmetic(39616) |
Question 1080415: Quadtatice model-projectile
I need to find an equation and the initial velocity for the equation-
h(t)=-16t^2+Vo*t+Ho
Ho=is the ball's height (in feet) at moment of release, the initial height
Vo= ball's speed (in feet/sec) at the moment of release, initial velocity
T= time (in seconds) since the ball was released
ho and vo are constants
I threw a ball up about 10 feet
Initial height started: 3.92 feet
Flight time:2.28 seconds
I need help being able to come up with an equation with this data to bring up on my calculator and graph. I don't know how find/solve or how to find the Vo which is the initial velocity.
Click here to see answer by stanbon(75887) |
Question 1080515: A company producing CDs for home computers finds that the total daily revenue for selling x items at p dollars per item is given by R(x) = 10x − 0.01x2. Use the fact that R = xp and your knowledge of factoring to find a formula that gives the price p in terms of x.
Click here to see answer by josgarithmetic(39616) |
Question 1080721: A company that manufactures mountain bikes makes a daily profit p according to the equation p=-200^2+8800x-94,062, where p is measured in dollars and x is the number of mountain bikes made per day. Find the number of mountain bikes that must be made each day to produce a zero profit for the company.
Click here to see answer by Fombitz(32388)  |
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