8v + 8b = 240
4v + b = 54....multiply by -2
-------------------
8v + 8b = 240
-8v - 2b = - 108 (result of multiplying by -2)
------------------add
6b = 132
b = 132/6
b = 22 <== buses hold 22 students
4v + b = 54
4v + 22 = 54
4v = 54 - 22
4v = 32
v = 32/4
v = 8 <== vans hold 8 students
The tangent to
has slope
, where

By the chain rule, we have

and by the product rule,


so that with
, we get

The tangent line is horizontal when the slope is 0; this happens for

where
is any integer. In the interval
, this happens for
, or

i.e at the points

and

A they should work on managing income what they spend and what they earn so they could spend less and make more make sense <span />
correct answer is (c)
Step-by-step explanation:
(a) Total no. of marbles=3+2+4=9
(1) No. of white marbles=2
∴ probability of getting a white marble=
9
2
(2) No. of blue marbles=3
∴ probability of getting a blue marble=
9
3
=
3
1
(3) No. of red marbles=4
∴ probability of getting a red marble=
9
4
I'm not sure abt this answer, sorry if I get it wrong
Step-by-step explanation:
the formula for the area of a sector is
(x°(r^2)π)/360
with x being the angle
r bring the radius of the circle
(255(13.4)^2π)/360
399.6
Hope that helps :)