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2 years ago

10

David read 69 books in a 12-month period. Sarah read 54 books in the same period of time. How many more books per month did Davi

d read than Sarah?

2 answers:

Stels [109]2 years ago

8 0

David = 69
Sarah = 54
69 - 54 = 15
David read 15 more books than Sarah.

koban [17]2 years ago

3 0

David read 15 more books

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A movie theater is offering a special summer pass. Passholders pay $8 per movie for the first 5 movies and watch additional movi

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Number of movies —— C

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Pierre lifts a 60-kg crate onto a truck bed 1 m high in 3 s. Marie lifts twenty-four 2.5-kg boxes onto the same truck bed in a t

lys-0071 [83]

Answer:

Pierre operates at a greater power level than Marie.

Marie and Pierre do the same amount of work

Step-by-step explanation:

Mass of crate=60kg

Height of truck bed=1 m

Time=3s

Pierre's work done= $60\times 1\times 9.8=588J$

Using formula Work done=mgh

Where m=mass of object

g=Acceleration due to gravity=9.8 $m/s^2$

Power= $\frac{w}{t}$

Using the formula

Pierre's power= $\frac{588}{3}=196watt$

Mass of box=2.5Kg

Total number of boxes=24

Total mass of boxes= $2.5\times 24=60kg$

Time=2 min= $2\times 60=120s$

1 min=60 s

Marie;s work done= $60\times 1\times 9.8=588J$

Marie's power= $\frac{588}{120}=4.9watt$

Pierre operates at a greater power level than Marie.

Marie and Pierre do the same amount of work

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2 years ago

If three sandwiches and two bags of chips cost $22.00, and two sandwiches and one bag of chips cost $14.25, how much does a bag

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Answer:

add them up

Step-by-step explanation:

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1 year ago

(c) if the corresponding terms of two arithmetic sequences are added, is the resulting sequence arithmetic?

Harman [31]

To determine whether the corresponding terms of 2 arithmetic sequence's added will give new arithmetic sequence or not, Let' take 2 Arithmetic sequences.

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Now nth term for first sequence = a1+(n-1) d1

nth term for second sequence = a2+(n-1) d2

Now add the 2 terms: a1+(n-1)d1 +a2 +(n-1)d2

= a1+a2 + (n-1)(d1+d2)

This is again new arithmetic sequence with first term a1+a2 and common difference d1+d2.

Hence if we add corresponding terms of 2 arithmetic sequence, we will again get an arithmetic sequence.

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2 years ago