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Anna is saving to buy a new cell phone. Her mother is helping Anna by contributing money each month. What is the ratio between the amount of money contributed by Anna and the amount contributed by her mother? What was the total amount saved in April?
General
2 months ago
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.6x − y = 14x − 3y = −11 4(−6x + 1) − 3y = −11 4(6x + 1) − 3y = −11 4x − 3(6x − 1) = −11 4x − 3(−6x − 1) = −11
General
2 months ago
3x^2+48=0, solve the equation
General
2 months ago
a radio station claims that the amount of advertising per hour of broadcast time has an average of 17 minutes and a standard deviation equal to 2.7 minutes. You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 11 minutes. Calculate the z-score for this amount of advertising time
General
2 months ago
Of the students in a school, 20 percent are in the science club and 30 percent are in the band. If 25 percent of the students in the school are in the band but are not in the science club, what percent of the students who are in the science club are not in the band?
General
2 months ago
A manufacturer of electroluminescent lamps knows that the amount of luminescent ink deposited on one of its products is normally distributed with a mean of 1.2 grams and a standard deviation of 0.03 gram. Any lamp with less than 1.14 grams of luminescent ink fails to meet customers’ specifications. A random sample of 25 lamps is collected and the mass of luminescent ink on each is measured. a. What is the probability that at least one lamp fails to meet specifications? b. What is the probability that five or fewer lamps fail to meet specifications? c. What is the probability that all lamps conform to specifications? d. Why is the joint probability distribution of the 25 lamps not needed to answer the previous questions?
General
2 months ago
If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? Use the equation h = −16t2 + 4t + 4. Round your answer to the nearest hundredth. 0.36 0.39 0.61 0.64
General
2 months ago
A parent is buying two types of chocolate truffles for the children. The oldest child likes white chocolate (W), the younger two like dark chocolate (D) and the spouse likes white chocolate (W). Three white chocolate truffles (W) cost the same as two dark chocolate truffles (D). If the parent bought 5 white chocolate truffles(W) and 10 dark chocolate truffles (D), and spent $60.00, how much was each dark chocolate truffle?
General
2 months ago
5. In a bag of 30 cookies, there are 12 chocolate chip, 4 double chocolate chip, 5 peanut butter, 3 sugar, and 6 mint chocolate cookies. If Sarah reaches in and takes a 2 cookies and eats them, what is the probability of her picking a chocolate chip cookie and then a peanut butter cookie? Are these events independent or dependent?2/29 60/ 870 3/6 12/16
General
2 months ago
Emery borrowed money from her brother to buy a new phone, and is paying off a fixed amount each week. After 2 weeks, she will owe $456, and after 5 weeks, she will owe $228A. What was the original amount emery borrowed?B.how much does she pay each week?C. How useful are equations in point slope and slope intercept forms for answering each question?
General
2 months ago
Graph the equation 3X-y=5
General
2 months ago
3. After the club president made the table in Problem 1, she realized that she did not account for members leaving the club. She anticipates that after the first year, the book club will lose 3 members per year. (a) The total number of members the president anticipates losing, from the first year through a given year, forms a sequence. Write the iterative rule for the sequence. Show your work.(b) The book club will have a party when the number of members reaches 100. Use iterative rules to predict when this party will be held. Show your work
General
2 months ago
Mr. Lopez began the two-way table below to display the dominant hand of the students in his first- and second-period classes.Dominant HandsLeft-handedRight-handedTotal1st Period9282nd Period531TotalHow many of Mr. Lopez’s second-period students are right-handed?14192645Answer:26, you take the total and minus the left handed. Pretty simple and I got it right on the test, so... Yah
General
2 months ago
Mr. Blackwells's class is conducting an experiment to find the probability of pulling certain colors from a bag of 25 marbles. If 2 arepurple, 7 are yellow, 2 are green, and the rest are black, what is the probability of drawing a purple and yellow if the marbles are notreplaced after they are picked?
General
2 months ago
John is creating a Thanksgiving display at the store where he works, using only canned pumpkin and canned green beans. He needs to maintain a ratio of pumpkin to green beans of 3 to 1. If he wants to use a total of 64 cans, how many cans of green beans should he use?
General
2 months ago
Please answer the question and show work. thx
General
2 months ago
Find the measure of Angle B A. 50° B. 55° C. 60° D. 65°
General
2 months ago
When a truckload of apples arrives at a packing plant, a random sample of 125 is selected and examined for bruises, discoloration, and other defects. The whole truckload will be rejected if more than 8% of the sample is unsatisfactory. Suppose that in fact 10 % of the apples on the truck do not meet the desired standard. What is the probability that the shipment will be accepted anyway?
General
2 months ago
Darcie wants to crochet a minimum of 3 33 blankets to donate to a homeless shelter. Darcie crochets at a rate of 1 15 15 1 start fraction, 1, divided by, 15, end fraction of a blanket per day. She has 60 6060 days until when she wants to donate the blankets, but she also wants to skip crocheting some days so she can volunteer in other ways. Write an inequality to determine the number of days, s ss, Darcie can skip crocheting and still meet her goal.
General
2 months ago
The weights of newborn babies are distributed normally, with a mean of approximately 105 oz and a standard deviation of 10 oz. If a newborn baby is selected at random, what is the probability that the baby weighs more than 75 oz
General
2 months ago
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