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makkiz [27]
3 years ago
8

Pls help me with this  11-3 and 11-4 u press the link below 

Mathematics
1 answer:
den301095 [7]3 years ago
7 0
11-3 and 11-4 are both the same problem.  Only the names and the numbers
are changed, but the process is exactly the same in both problems.

<em><u>11-3)</u></em>. If Andy joins the health club, he will pay $34.50 every month.
How many months are in  year ?  Over here where I come from, we get
12 months each year.
Andy will pay $34.50 twelve times.
All together, he will spend (12) x ($34.50) = $414 on membership.

<em><u>11-4)</u></em>.  Julie rides her bike 5 times a week.
34.75 miles on Monday
34.75 miles on Tuesday
34.75 miles on Friday
34.75 miles on Saturday
34.75 miles on Sunday.
How many 7 total miles does she ride each week ?

(5) times (34.75) = 173.75 miles


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The sum of two numbers is 90. Their difference is 18. Find<br> the numbers.
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Answer:

36 & 54

Step-by-step explanation:

<em><u>By </u></em><em><u>Question</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em>

  • Sum of numbers = 90 .
  • Difference of numbers = 18 .

<em><u>Let </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em>

  • First Number be x .
  • Second number be y .

<em><u>According</u></em><em><u> to</u></em><em><u> </u></em><em><u>1</u></em><em><u>s</u></em><em><u>t</u></em><em><u> </u></em><em><u>condition</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em>

: \implies x + y = 90

<u>According</u><u> to</u><u> </u><u>2</u><u>n</u><u>d</u><u> </u><u>condition</u><u> </u><u>:</u><u>-</u><u> </u>

: \implies x - y = 18

<em><u>Adding</u></em><em><u> the</u></em><em><u> </u></em><em><u>equations</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em>

: \implies 2x = 18 + 90

: \implies 2x = 108

: \implies x = 54

<em><u>Therefore</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em>

: \implies First number = 54

: \implies Second number = 36

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They had no placeholding zero.

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Zero is key to our system of numbering, as it helps us hold place as well as representing nothing. Without it, it is easier to represent problems in words.

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