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2 years ago

12

One printing machine printed 500 books in 40 hours this week. A second printing machine printed for 30 hours this week but print

ed books at twice the hourly rate of the first machine. How many books did the second machine print this week?

1 answer:

babunello [35]2 years ago

3 0

The second machine would print 750 books in 30 hours that week.

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Use the table and the data provided to analyze the following data. During gym class, the pulse rate was recorded for 19 students

nexus9112 [7]

Answer:

Part A

Please see attached the required stem and leaf plot

For the stem and leaf plot, the nonsplit system is used because of clarity for analysis

Part B:

From the shape of the stem and leaf plot we have that there is an average increase of pulse rate of 20 pulses in all the 19 students after the exercise

The shape of the plot is relatively the same for the before and after exercise save for the decrease in the third to the last row by one and the increase in the second to the last roe by one student

The spread remained relatively constant in both cases with the most being in the 60s range having 7 students in the before exercise and the 80s range having 8 students in the after exercise leaf plot.

Step-by-step explanation:

The given data are;

67 ${}$ 87

67 ${}$ 88

67 ${}$ 89

68 ${}$ 89

71 ${}$ 91

72 93

72 93

75 95

77 96

77 97

79 98

81 98

85 101

87 105

87 105

91 119

97 125

103 125

121 147

3 0

2 years ago

lucas divides his pizza into three equal pieces for himself and his two friends. his friend teddy eats 5/8 of his piece for lunc

Marina CMI [18]

Answer:

He ate $\frac{1}{20}$ of the original pizza for dinner

Step-by-step explanation:

- Lucas divides his pizza into three equal pieces for himself and his two

friends

∵ There are 1 pizza

∵ It is divided into 3 equal parts

∴ Each part is $\frac{1}{3}$

∴ Teddy takes $\frac{1}{3}$ of the pizza

- Teddy eats $\frac{5}{8}$ of his piece for lunch and a further $\frac{2}{5}$ of what

remains for dinner

∵ His piece is $\frac{1}{3}$

∵ He eats $\frac{5}{8}$ of his piece for lunch

∴ He eats for lunch = $\frac{5}{8}$ × $\frac{1}{3}$ = $\frac{5}{24}$

- Let us find the remaining of his piece for dinner

∵ The remaining = $\frac{1}{3}$ - $\frac{5}{24}$

- Make L.C.M for the denominators

∵ The L.C.M of 3 and 24 is 24

∵ $\frac{1}{3}$ = $\frac{1*8}{3*8}$ = $\frac{8}{24}$

∴ The remaining = $\frac{8}{24}$ - $\frac{5}{24}$

∴ The remaining = $\frac{3}{24}$ = $\frac{1}{8}$

∵ He ate $\frac{2}{5}$ of the remaining for dinner

∵ The remaining of his piece = $\frac{1}{8}$

∴ He ate for dinner ⇒ $\frac{2}{5}$ × $\frac{1}{8}$

∴ He ate for dinner ⇒ $\frac{2}{40}$ = $\frac{1}{20}$

* He ate $\frac{1}{20}$ of the original pizza for dinner

8 0

2 years ago

Ellen drew a graph showing the solution to an inequality. A number line going from negative 1.25 to positive 0.75. An open circl

Sauron [17]

Answer:

Negative 3.25 greater-than negative 2.5 + r

Step-by-step explanation:

The solution Ellen drew is ...

r < -0.75

This is the solution to ...

-3.25 > -2.5 +r

-0.75 > r . . . . . . . add 2.5 to both sides

_____

<em>Comment on the problem text</em>

Math expressions are much easier to read if you use math symbols to write them.

3 0

2 years ago

Read 2 more answers

mike and mandy bought the same item mike paid 15000 mandy got a discount and paid 3000 less than mike how much of a discount did

slega [8]

She got a 20% discount

5 0

2 years ago

Read 2 more answers

Sophia and Scott each open a bank account with an initial deposit of $50 each. Scott planned to save 30% of his earnings from hi

scoray [572]

Answer:

During the 9th week

Step-by-step explanation:

Scott: 50 + (0.3)(8×25)t

= 50 + 60t

Sophia: 50 + 45t + 30(t-4)

= -70 + 75t

60t + 50 = 75t - 70

15t = 120

t = 8

After 8 weeks they will have the same amount,

Which is during the 9th week

6 0

2 years ago