Sorry....I thought they wanted the true ones
C, E would be correct for the false ones !!!!
f(1) = 0 + 2(1) + 1 = 3
f(2) = 3 + 2(2) + 1 = 8
f(3) = 8 + 2(3) + 1 = 15
f(4) = 15 + 2(4) + 1 = 24
radius ^2 = 15^2 + 9^2 = 225 + 81 = 306
The equation is
x^2 + y^2 = 306
If the sum of a number's digits is divisible by 3, the number is divisible by 3
So
412 + 2 = 414
and
4 + 1 + 4 = 9
So....414 is divisible by 3 (and a multiple of 3)
A) a must be a divisor of 60 if a is a factor of b and b divides 60
B) if b is a divisor of 60, then 60 is a multple of b
D) the largest that b and c can be are 20 and 30, respectively.....a is smaller than both....so...a cannot be 20
x = ( 180 - 105) / 2 = 75 / 2 = 37.5°
Note that when x changes by - 2, y changes by 8
So when x changes by -1, y changes by 4
So...we can solve this
( 3 - 0) / ( 5 - y) = -1 / 4
3 / (5 - y) = -1/ 4 cross-multiply
3*4 = -1 ( 5 - y)
12 = - 5 + y
12 + 5 = y
17 = y
Good job, MG!!!!!
See Melody's answer here : https://web2.0calc.com/questions/another-math-question_3
I think its supposed to be "C"....the equation is
y = (1/5) x + 1