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IrinaK [193]
3 years ago
8

Randy has to pick two people to work with out of 15. How many different groups can he pick?

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
5 0
He can only pick 7 different groups because 2 times 7 is 14, and there are 15 people in all.

Hope this helps. c:
atroni [7]3 years ago
5 0
105 different groups without doubling
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An observer, whose eyes are 1.98 m above the ground, is standing 39.2 m away from a tree. The ground is level, and the tree is g
lozanna [386]

Answer:

The tree is 16.25 m tall.

Step-by-step explanation:

Attached is a diagram that better explains the problem.

From the diagram we see that the distance between the top of the tree and the line of sight of the observer is x.

To find the height of the tree, we need to first find x and then add it to the height of the observers line of sight from the ground.

Using SOHCAHTOA trigonometric function:

tan(20) = x/39.2

=> x = 39.2 * tan(20)

x = 39.2 * 0.364

x = 14.27m

Hence, the height of the tree is:

(14.27 + 1.98)m

16.25m

The tree is 16.25 m tall.

5 0
3 years ago
The volume of a pyramid with a square base where the area of the base is 8.7m^2 and the height is 10
MrMuchimi

Answer:

  29 m³

Step-by-step explanation:

The applicable formula is ...

  V = (1/3)Bh

Assuming the height is 10 m, the volume is ...

  V = (1/3)(8.7 m²)(10 m) = 29 m³

_____

The shape of the base is irrelevant.

5 0
4 years ago
What is the sales tax on a chair with a price tag of $180, if the tax rate is 5.75%?
Anuta_ua [19.1K]

Answer:

$190.35

Step-by-step explanation:

180 ⋅ 0.0575 = 10.35

Add 180 to 10.35

$190.35

(I could be wrong. Sorry if I am)

Hope I helped :)

Please consider Brainliest :)

8 0
3 years ago
I will mark brainlist and 20 extra points
grandymaker [24]
(X1=1, y1=7) and (x2= -4, y2 =-8)

Slope = ( y2-y1)/(x2-x1)= (-8-7)/(-4-1)= -15/-5=3

Slope is 3
5 0
4 years ago
Read 2 more answers
sara buys a sweater at a department store the sweater costs $30 the store is having a 25% off sale on everything in the store. e
tatuchka [14]

Answer:

$7.50

Step-by-step explanation:

Sara buys a sweater that costs $30

The store is having a 25% off sale.

To figure out what 25% is you do 25/100, which will give you 0.25,

Multiply 0.25 by $30

You should get $7.50.

3 0
3 years ago
Read 2 more answers
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