Answer:

Step-by-step explanation:
<u><em>The complete options are</em></u>
a) x - 2y = 30
b) 4x - 3y = 30
c) 3x - 4y = 30
d) 6x - 6y = 30
The given equation is

<u>Verify option d</u>
we have

Divide by 6 both sides



therefore
and
are equivalent
Answer:
5
Step-by-step explanation:
Answer:
461.8
Step-by-step explanation:
V=(1/3) πr^2h
V=(1/3)π(7^2)9
V=461.8
Sorry inputed wrong in calculator first time
Answer:
Step-by-step explanation:
Given is a right angled triangle in which third side is the hypotenuse.
Therefore, by Pythagoras theorem:

Answer:
The number of coins to make 6440 mm diameter is 230
Step-by-step explanation:
The diameter of the coin is 28mm
Number of coins to have 6440 mm will be
6440/28
= 230