Answer:
36
Step-by-step explanation:
90-54=36
right angles measure 90 therefore angle a and b has to add up to 90
Answer:
45, 36
Step-by-step explanation:
let x y minutes be the time for pipes to fill the tank, let n be the water needed to fill the tank.
x-y=9
(n/x)*20+(n/y)*20=n
n is removed by dividing the 2nd equation by n
here u get:
(1/x+1/y)*20=1
you sub x=9+y into the above equation
1/y+1/(9+y)=1/20
((9+y)+(y))*20=(9+y)(y)
180+40y=9y+y2
y2-31y-180=0
then use the quadratic formula and u will find y=36 or -5
-5 is rejected because it is negative
x=36+9=45
therefore it is 36 mins and 45 mins
Both
1 times a=a
and
b times 0=0
I think the answer is C. 45 units
Answer:
5:55
Step-by-step explanation:
10 plus 7 in time is 5 and 15 plus 40 is 55
