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snow_tiger [21]
3 years ago
11

A group of 120 students were asked how old they were when they lost their first tooth. 50% said they were 7 years old. How many

students said they were 7 years old when they list their first tooth? explain.​
Mathematics
1 answer:
alexandr402 [8]3 years ago
7 0

Answer:

60

Step-by-step explanation:

half of 120 is 60

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Triangle ABC has vertices with Alx, 3).
densk [106]

Answer:

x = 3

This triangle ABC will be a right triangle as its sides obey the Pythagoras theorem.

Step-by-step explanation:

Let us assume that the triangle Δ ABC has vertices A(x,3), B(-3,-1) and C(-1,-4) and it is a right triangle.  

We have to determine x.

Applying the Pythagoras Theorem,

AB² + BC² = AC² {If AC is the hypotenuse of the right triangle}

⇒ [(x + 3)² + 4²] + [(- 2)² + 3²} = (x + 1)² + 7²

⇒ x² + 6x + 38 = x² + 2x + 50

⇒ 4x = 12

⇒ x = 3 (Answer)

This triangle ABC will be a right triangle as its sides obey the Pythagoras theorem. (Answer)

5 0
3 years ago
What is the volume of a cone with a radius of 18 cm and a height of 10 cm? Use 3.14 for pi. Round your answer to the nearest ten
GREYUIT [131]
I hope this helps you




Volume of Cone = 1/3.pi.r^2.h



Volume=1/3.3,14.18^2.10


Volume=10173,6/3


Volume=3391,2
7 0
3 years ago
Read 2 more answers
A person standing in the ground throws a ball onto a flat rooftop. The ball rolls around for several seconds. Then the ball fall
natali 33 [55]

Answer:

  • Graph D

Step-by-step explanation:

According to the question, the correct graph is D.

It's not A because, the ball is thrown after some pause and the ball doesn't roll on the roof, falls immediately.

It's not B or C because the ball goes up after reaching the roof but should fall down.

6 0
2 years ago
Need help w this please
rusak2 [61]
Solved using proportions.

8 0
3 years ago
Find the area of the shape shown<br> below.
Allisa [31]

Answer:

The area of the figure is 28 units².

Step-by-step explanation:

Find the area of the full rectangle, ignoring the triangle.

a = lw \\ a = 4 \times 8 = 32

Then, find the area of the triangle:

a =  \frac{bh}{2}  \\ a =  \frac{2 \times 4}{2}  \\ a = 4

Finally, subtract:

32 - 4 = 28

7 0
3 years ago
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