Yes 4.47 is a rational number
Answer:
y = -2x + 22
Step-by-step explanation:
You fill an aquarium with water, the water is 22 inches deep. The water evaporates at 2 inches per week. Write an equation that approximates the depth y of water in the aquarium x weeks after you fill it.
Answer: The problem above represents that of a linear function. The equation of a linear function is given by:
y = mx + b, where y is the dependent variable, x is the independent variable, m is the rate of change and b is the initial value of y when x = 0.
From the problem, the independent variable is the number of weeks and the dependent variable is the depth of water, hence y = depth of water and x = weeks after you fill it.
The rate = 2 inches per week, since it evaporates (decreases), hence m = rate of change = -2. Also, at 0 weeks (x = 0), the depth (y) = 22 inches, therefore b = 22. Using the equation for linear function, we get:
y = -2x + 22
Answer: The correct answer is 341 children
Step-by-step explanation:
Firstly you solve for the number of children that like both types of ice cream.
Let us assume it to be x
(150 - x )+ x + (125 - x) + 166 = 391
150 + 125 + 166 - x + x - x = 391
441 - x = 391
X = 441 - 391
X = 50
Since 50 children like at least one type of ice cream, subtracting it from the total no. of children will give the number of children that like at most one type
Therefore, 391 - 50 = 341 children
Alternatively,
Sum up children who like only chocolate ice cream + pistachio ice cream only + does who don't like any type of ice cream
= (150 - 50) + (125 - 50) + 166
= 100 + 75 + 166
= 341 children
y-intercept is 3 and the x-intercept is none
5,090,000 should be correct.