Acute angle means Q I so both sin and cos are +
sin2 + cos2 =1 then cos = sqrt ( 1 - (8/17)^2) = 15/17
cot = cos / sin ......... you can finish
*** corrected ***
Had an incorrect '+' sign:
and at -2 x-5 has to equal 2x-b
x-5 = 2x-b
b - 5 = x for x = -2
b - 5 = -2
b = 3
s = son age
r = rob age = 3s
3s + s = 64
4s = 64
s = 16 y/o
r = 3 s = 3(16) = 48 y/o
p = phones
a = accessory = 7+p
10 p + 4 (7+p) = 126
p = 7 then a = 14
Welll 1/2 of the upper square is shaded
the triangle on the bottom is 1/2 * 1/2 * 1/2 of the original area of the lower square
= 1/8 of the lower square
2 squarea: [1/2 (square) + 1/8 (square) ] / 2 square = 5/16 area shaded
The line of the graph needs to be continuous so
at x = 2 ax+3 has to equal x-5
ax+3 = x-5
ax = x - 8 at x= 2
a(2) = 2-8
a = -3
b+5 = x for x = -2
b+5 = -2
b = -7
a = # apps cost 75a
b = bans = 11-a cost 50(11-a)
75a + 50(11-a) = 750
25a = 200 a = 8 then b = 11-8 = 3
Your Q is missing some info
5x-6 = 4x+ 9 assuming the '5' is incorrect
5x = 4x+15 to make no solutions, if the '5' were a '4' there would be no soluntions
of rolling a sum of ??
53 is a prime number....so sqrt(53) is in simplest radical form
