Let S = {100, 101, 102, ... , 999} so that ISI = 900. U 1 (b) In how many ways can she invest her money if each fund must get at least $1000? 5. (a) How many numbers in S have at least one digit that is a 3 or a 7? Examples: 300, 707, 736, 103, 997.

x=30

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)