Answer:
circumference of a circle=πd where d is the diameter of the circle.
this implies, the circumference=3.14*10cm
=31.4cm
Answer: 109
Step-by-step explanation: add 19.95 to 79 then subtract it from 221.97
If you divide it by 5 on both numbers you get four and three. So 4 is the answer.
Answer:
3
Step-by-step explanation:
set the two equations equal to each other
2y+3 = 5y-6
add 6 to both sides
subtract 2y from both sides
9=3y
divide both sides by 3
y=3
Answer:
Step-by-step explanation:
first, let us mark the two equations as i and ii
2x+ 3y = 7
or, 2x = 7-3y
or, x = (7-3y) ÷ 2.........................(i)
and let 4x-5y= 25............(ii)
Now, put the the value of x from (i) into (ii)
4[(7-3y) / 2] -5y = 25
2(7-3y) -5y = 25
14- 6y - 5y = 25
-11y = 11
y = -1
Now, put y = -1 back in (i)
x = (7-3y)/2
x = 10 /2
x = 5
