HELP PLEASE........ on these 2

Mathematics

1 answer:

tester [92]3 years ago

8 0

For y=4 draw a horizontal line through the y-axis at point (0,4). Y-axis is the vertical.
For x=-3 draw a vertical line through the x-axis at point (-3,0). X-axis is the horizontal.

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Kelly bought a book of 20 stamps. She has used 80% of them. A. How many stamps has Kelly used? B. How many stamps does she have

jok3333 [9.3K]

80% of 20 is 80/100 x 20 = 16

So, kelly has used 16 stamps, and has 4 left

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3 years ago

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Answer Both Questions

labwork [276]

Answer:is the first answer 15.875 and the second answer 17 x 28 ÷5

Step-by-step explanation:

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A swim meet has 13 contestants signed up for the 100-meter butterfly event. The first heat has 6 swimmers. How many different wa

tino4ka555 [31]

Answer:

6 swimmers in the first heat can be arranged in 1716 different ways.

Step-by-step explanation:

A swim meet has 13 contestants signed up. To calculate the arrangement of first 6 swimmers in first heat we will use combinations because order doesn't matter.

So to select 6 swimmers out of 13 contestants number of different ways

= $^{13}C_{6}$