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valentinak56 [21]
3 years ago
5

3 4/12 x 9/12 =? And need to show how we got it

Mathematics
2 answers:
mrs_skeptik [129]3 years ago
8 0

Answer:

2 \frac{1}{2} or 2.5

Step-by-step explanation:

Convert mixed numbers to improper fractions:

\frac{40}{12} × \frac{9}{12}

Cancel the common factor (4):

\frac{10}{3} × \frac{9}{12}

Cancel the common factor (3):

\frac{3}{4} × \frac{10}{3}

Multiply fractions:

\frac{10 * 3}{3*4}

Cancel the common factor (3):

\frac{10}{4}

Cancel the common factor (2):

\frac{5}{2}

Convert improper fraction to mixed number:

\frac{5}{2} = 2 \frac{1}{2} or 2.5

Mandarinka [93]3 years ago
7 0

Answer:

Hope that helps. Type the question into photomath

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TiliK225 [7]

Answer:

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5 0
2 years ago
Graph in comments
Xelga [282]

it is going to take 18 miles in 1 hour

3 0
2 years ago
The average amount of time that students use computers at a university computer center is 36 minutes with a standard deviation o
frosja888 [35]

Answer:

2119 students use the computer for more than 40 minutes. This number is higher than the threshold estabilished of 2000, so yes, the computer center should purchase the new computers.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 36, \sigma = 5

The first step to solve this question is finding the proportion of students which use the computer more than 40 minutes, which is 1 subtracted by the pvalue of Z when X = 40. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{40 - 36}{5}

Z = 0.8

Z = 0.8 has a pvalue of 0.7881.

1 - 0.7881 = 0.2119

So 21.19% of the students use the computer for longer than 40 minutes.

Out of 10000

0.2119*10000 = 2119

2119 students use the computer for more than 40 minutes. This number is higher than the threshold estabilished of 2000, so yes, the computer center should purchase the new computers.

8 0
3 years ago
Lucy cuts 4 squares with side length x in. from the corners of a 6 in. by 9 in. cardboard rectangle. She folds the remaining car
Cloud [144]

Answer:

Lucy cuts 4 squares with side length x in. from the corners of a 6 in. by 9 in. cardboard rectangle. She folds the remaining cardboard to make a tray that is x in. high. Write and simplify a polynomial function for the volume V

Step-by-step explanation:

9v

8 0
2 years ago
Evan is landscaping his backyard. The yard is shaped like rectangle and measures 80 feet by 70 feet. He wants to spread topsoil
Andrew [12]
80x70= y and then 400 - y= your answer! Ignore the four in. Deep part
5 0
2 years ago
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