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4 years ago

In ΔPQR, point C is the centroid. If CZ = 8, then QC = A) 4 B) 8 C) 16 D) 24

Mathematics

2 answers:

Len [333]4 years ago

5 0

Answer:

QC is 16

Step-by-step explanation:

irinina [24]4 years ago

5 0

Answer:

QC=16 this is correct on usa testprep

Step-by-step explanation:

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Akiko leaves the mall and drives directly west at a speed of 60 mph. At the same time, Kosuke leaves the mall and drives 40 degr

Ostrovityanka [42]

You know that Akiko is 45 miles from the origin...Kosuke is (135/4) miles from the origin... You can draw a figure to clearly see the situation.

you "know" that the angle between their routes is 140º 

the side opposite (140º) is the distance between them... 

c^2 = (45)^2 + (135/4)^2 - 2(45)(135/4) cos 140 

c ≈ 74.1 mile

Hope this answers the question.

8 0

3 years ago

Geometry: complete this proof, ASAP!!!!!!!!!!!!!!!! It’s urgent

mixas84 [53]

Answer:

1.ABC is equilateral triangle because all sides are equal

3.because they are the joined figure of a triangle

7 0

2 years ago

Please help me with this

Tatiana [17]

Answer:

A= 65 in. ^2

Step-by-step explanation:

first make them into different shapes

I made 3 different rectangles

#1 4 by 6

#2 4 by 8

#3 3 by 3

for a area of a rectangles you do base times the height

#1 6*4 = 24

#2 4*8 = 32

#3 3*3 = 9

now you add them up

24+32+9

= 65 in. ^2

3 0

3 years ago

A man is in a boat 2 miles from the nearest point on the coast. He is to go to point Q, located 3 miles down the coast and 1 mil

mafiozo [28]

Answer:

The answer is "0.45385".

Step-by-step explanation:

The time is taken to reach the coast $= \frac{\sqrt{(2^2 + x^2)}}{4}$

The time is taken to reach Q after reaching the coast $= \frac{\sqrt{(1 + (3-x)^2)}}{4}$

Total time, $T= \frac{\sqrt{(1 + (3-x)^2)}}{4}+ \frac{\sqrt{(1 + (3-x)^2)}}{4}$

This has to be minimum,

$\to \frac{dt}{dx} = 0$

$\to \frac{\sqrt{(2^2 + x^2)}}{2} + \frac{\sqrt{1 + (3-x)^2}}{3}\\\\ \frac{x}{4}\sqrt{(4+x^2)} + \frac{(x-3)}{(4\sqrt{(x^2-6x+10)}} = 0\\\\\frac{x^2}{16} \times (4+x^2) = \frac{(x-3)^2}{16 \times (x^2-6x+10)}\\\\x^2(4+x^2) = \frac{(x-3)^2}{(x^2-6x+10)}\\\\4x^2+x^4 = \frac{ x^2+9-6x}{(x^2-6x+10)}\\\\ 4x^2+x^4(x^2-6x+10) = x^2+9-6x\\\\4x^4-24x^3+40x^2+x^6-6x^5+10x^4= x^2+9-6x\\\\x^6-6x^5+ 14x^4-24x^3+39x^2+6x-9=0\\\\$

x=0.45385

6 0

3 years ago

Netti works as a waitress in a restaurant. They have numbers for each kind of order. On a busy day, tired Neeti lines up all the

zubka84 [21]

Answer: (I don't know if this is right or not)

7 pancakes

3 eggs

3 waffles

Step-by-step explanation:

4 pancakes

5 eggs

8=3

+3 pancakes

-3 eggs

7 0

3 years ago