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ch4aika [34]
3 years ago
13

Alex and Lara have $21.00 each to spend at a book fair, where all students receive a 35%; discount. They both want to purchase a

copy of the same book, which normally sells for $28.50 plus 10% sales tax. To check if he has enough to purchase the book, Alex takes 35% of $28.50 and subtracts that amount from the normal price. He takes 10% of the discounted selling price and adds it back to find the purchase amount. Lara takes 65% of the normal purchase price and then computes 110% of the reduced price. Is Alex correct? Is Lara correct? Do they have enough money to purchase the book? Explain your answer using complete sentences. Be sure to show your calculations for determining the final cost of the book for each student.
Mathematics
1 answer:
Vilka [71]3 years ago
8 0
The book cost 28.50 + 10%. Take 28.50 x .10 = 2.85 + 28.50 = 31.35 students get a 35% discount take 31.35x.35=10.97 now subtract 31.35 -10.97= 20.48 they have 21.00 dollars to spend after buying the book they .52 cents left.
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Answer:

6

Step-by-step explanation:

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A bag is filled with green and blue marbles. There are 105 marbles in the bag. If there are 25 more green marbles than blue marb
Talja [164]

Answer:

Step-by-step explanation:

we have 105 marbles

number of blue marbles= x

green marbles= x+25

x+x+25=105

2x=105-25

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3 years ago
What is the greatest measure of length? A. 5,000 meters B. 6,000 centimeters C. 30,000 millimeters D. 1 kilometer
Bess [88]

Answer: A. 5,000 meters

Step-by-step explanation:

Starting with the smallest unit which is option C. There are 10 millimeters in one centimetre. Option c in centimeters is:

= 30,000 / 10

= 3,000 meters.

Option c is smaller than B and so is incorrect.

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= 6,000 / 100

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A kilometer is 1,000 meters so option A in meters is:

= 5,000 / 1,000

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3 years ago
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Daniel [21]

Answer: 0.167

Step-by-step explanation:

This is an applied mathematics question

Resistors in parallel  ⁾/R = ¹/₁₂₀ + ¹/₁₂₀ since the resistor is two 120

Therefore , resolve into fraction now yield

                       ¹/R                              =         1 + 1  

                                                                    -------

                                                                     120

                                                          =         2/120

                                                          =          ¹/₆₀

Therefore,                                  ¹/R   =      ¹/₆₀

 Cross multiply to get R the resistance

                                                      R  =  60

From formula,                                V = IR where I is the current

There fore making I the subject of the formula

                                                        I = V/R

                                                          = 10/60

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                                                          = 0.167 A, A = ampere which is the unit of current.

                   

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Step-by-step explanation:

Quotient means to divide. So the quotient of 30 and another number would be 30/a

3 0
3 years ago
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