500 tickets were sold for a concert tickets for adults an...
500 tickets were sold for a concert tickets for adults and children were sold at $4.50 and $3.00 respectively if the total receipts for the concerts was $1987.50 how many tickets for adults were sold?
325
235
175
400
Correct answer is A
A for Adults
C for children
a + c = 500
c = 500 - a
4.5a + 3c = 1987.50
where c = 500 - a
4.5a + 3(500 - a) = 1987.50
4.5a - 3a = 1987.50 - 1500
1.5a = 487.5
a = 487.5 / 1.5
a = 325 tickets
c = 500 - a
c = 500 - 325
c = 175 tickets
Check:
from 4.5a + 3c
4.5 (325) = 1,462.5
+
3(175) = 525
solve the equation cos x + sin x 1cosx−sinx for values of such that 0 ≤ x < 2...
P = {x:(x - 2)(x + 3) (x - 4)(x + 5) = 0}. The elements in P are ...
In the figure, YXZ = 30o, XYZ = 105o and XY = 8cm. Calculate YZ...
Find all real number x which satisfy the inequality 13 (x + 1) - 1 > 15...
Integrate x2−√xx with respect to x ...
Find the sum to infinity of the series 14, 18, 116,...........