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natita [175]
3 years ago
8

Factorise : 3a^3 + 648b^3.

Mathematics
1 answer:
suter [353]3 years ago
8 0

Answer:

hope this hepls u.........

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The Center of circle (x-5)^2 + (y-13)^2=81 is (-5,-13). True or false!! thanks
Mumz [18]
False. because.....

the equation of a circle is (x-h)^2 + (y-k)^2 = r^2 and the center is (h,k) 
if the center of a circle is (-5, -13) substitute the values into the equation 
so....(x- -5)^2 + (y- -13)^2 = r^2  which is (x+5)^2 + (y+13)^2 = r^2 

in this case, because you are only asking about the center of the circle from the equation the 81 or radius of the circle doesn't matter. 
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3 years ago
Nita uses 1/3 of a carton of 12 eggs how many eggs does she use
Valentin [98]
What's 1/3 of 12?

Mulitply 1/3 times 12 = 4

Nita uses 4 eggs.
5 0
3 years ago
Find the area of both of these trapeziods using the formula (b1 + b2) • h ÷ 2.
madreJ [45]

Answer: 24 and 104

Step-by-step explanation:

4 0
3 years ago
If sin(y°) = cos(x°), which of the following statements is true?
Firdavs [7]

Answer:

<u>y = w and ΔABC ~ ΔCDE</u>

Step-by-step explanation:

Given sin(y°) = cos(x°)

So, ∠y + ∠x = 90°  ⇒(1)

And as shown at the graph:

ΔABC is aright triangle at B

So, ∠y + ∠z = 90° ⇒(2)

From (1) and (2)

<u>∴ ∠x = ∠z </u>

ΔCDE is aright triangle at D

So, ∠x + ∠w = 90° ⇒(3)

From (1) and (3)

<u>∴ ∠y = ∠w</u>

So, for the triangles ΔABC and ΔCDE

  • ∠A = ∠C  ⇒ proved by ∠y = ∠w
  • ∠B = ∠D  ⇒ Given ∠B and ∠D are right angles.
  • ∠C = ∠E  ⇒ proved by ∠x = ∠z

So, from the previous  ΔABC ~ ΔCDE by AAA postulate.

So, the answer is <u>y = w and ΔABC ~ ΔCDE</u>

4 0
3 years ago
Read 2 more answers
The length of a room is 8 feet more than twice width. If it takes 124 feet of molding to go around the perimeter of the room, wh
guajiro [1.7K]
Width- 18 ft
Length- 44 ft

3 0
4 years ago
Read 2 more answers
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