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faltersainse [42]
2 years ago
14

Matthews test grades were 80 92 85 91 and 88 find the mean of his grades

Mathematics
1 answer:
ad-work [718]2 years ago
4 0
80+92+85+91+88=409
436/5=87.2 is the median
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Please help me solve 5 and 6 for my homework
defon

Answer:

(5) The perpendicular height of the triangle is 8.48 mm.

(6) The 1184.86 cm far up the wall the ladder reach.

Step-by-step explanation:

Part (5):

When a perpendicular is drawn in an isosceles triangle then the perpendicular divided the base into 2 equal parts.

The figures is shown below.

In ΔABC,

CB = 6 mm

So,

CD = BD = 3 mm

Now calculating the perpendicular height of the triangle.

Using Pythagoras theorem in ΔADC:

(AC)^2=(CD)^2+(AD)^2\\\\(9)^2=(3)^2+(AD)^2\\\\81=9+(AD)^2\\\\(AD)^2=81-9\\\\(AD)^2=72\\\\AD=8.48mm

Thus, the perpendicular height of the triangle is 8.48 mm.

Part (6):

The figure is shown below.

Converting meter to centimeter:

1 m = 100 cm

So,

12 m = 1200 cm

Using Pythagoras theorem in ΔXYZ:

(XZ)^2=(YZ)^2+(XY)^2\\\\(1200)^2=(190)^2+(XY)^2\\\\1440000=36100+(XY)^2\\\\(XY)^2=1440000-36100\\\\(XY)^2=1403900\\\\XY=1184.86cm

Thus, 1184.86 cm far up the wall the ladder reach.

4 0
2 years ago
After a sleepover, 3/4 of a large pepperoni remained. The next day, he ate 1/8 of what was left over. What fraction of a large p
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Answer:

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Step-by-step explanation:

You find 1/8 of 3/4 which is 9/100

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3 years ago
It’s number 1. I’ll give brainliest
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Step-by-step explanation:

Hope this Helps!

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T=time
when the piano dropped at t=0, its velocity also equals 0
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