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3 years ago

NEED HELPPP!! 18 19 and 20 PLEASEEEE URGENT

Mathematics

1 answer:

Yanka [14]3 years ago

7 0

Answer:

18. 368 students

19. 16

20.

Step-by-step explanation:

18.

students : faculty

23:5

x : 80

in total, there are 23+5 parts = 28 parts

5/28 = 80 faculty members

so 23/28 = x students

so use the find for one method.

If 5/28 = 80, then

80/5 = 1 member

so to find for 23 members,

80/5 × 23

=368 students

19. 640/40 = 16

20.

h = height of tree

h = 8.5 shadow

3 = 3.75 shadow

If 3.75 = 3

then 1 ft shadow = 3/3.75

then 8.5 ft shadow = 3/3.75 × 8.5

=6.8 ft tree.

proportion: 3/3.75 = h/8.5

answer: 3/3.75 = 6.8/8.5

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