Mathematics, 29.06.2019 05:30 yjudon37

Carlos spent 1 1/4 hours doing his math homework. he spent 1/4 of this time practicing his multiplication facts. how many hours did carlos spend practicing his multiplication facts?

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Answer from: chocolate4550

18.75 minutes or 0.3 (3/10 or almost 1/3)

Step-by-step explanation:

Carlos spent $1\frac{1}{4}$ hours doing math. If an hour is 60 minutes, this means he spent 60 minutes and 1/4 of 60 minutes which is 15 minutes. In total he spent 75 minutes on math.

We also know he spent 1/4 of that 75 minutes on multiplication facts. How long did he spend?

We will multiply by the two quantities to find the amount.

$\frac{1}{4} (75)=\frac{75}{4} = 18.75 minutes$

We will convert this back into hours by dividing it by 60 minutes since 60 minutes= 1 hour.

$\frac{18.75}{60} =0.31$

He spent 0.3 or 3/10 or about 1/3 of his time on multiplication facts.

Answer from: Quest

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins. bar charts, on the other hand, can be used for a great deal of other types ofvariables including ordinal andnominal data sets.

Answer from: Quest

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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