Answer:
n = 30
Step-by-step explanation:
Let n represent the number. Then (2/3)n = 20.
Solve for n by multiplying both sides by (3/2): n = (3/2)(20) = 30
Wait just a second, what's the radius of the circle anyway?
well, the radius is the segment going from the center of the circle to the circle itself, well, low and behold, if we just get the distance from those two points, that gives us the radius.
Answer: Sally paid less
Step-by-step explanation:
From the question, Sally paid $1.50 for 2 1/2 pounds of apples at the Grocery Mart. The cost per pound of apple will be:
= $1.50 ÷ 2 1/2
= $1.50 / 2.5
= $0.6 pee pound of apple
Fred paid $1.95 for 3 pounds of apples at the Corner Fruit Stand. The cost per pound of apple will be:
= $1.95 / 3
= $0.65 pee pound of apple.
Sally paid less
Answer:
45 degrees I believe
Step-by-step explanation:
Answer:
y = 10(½)^(x)
Step-by-step explanation:
In writing exponential functions passing through points, we will just substitute the x and y values in each case into y = ab^(x).
Now, for point (-1, 20), the exponential function is; 20 = ab^(-1)
20 = a/b
For the point (1, 5), the exponential function is; 5 = ab^(1)
5 = ab
From 20 = a/b, we have; a = 20b
Thus, putting 20b for a in 5 = ab, we have;
5 = 20b(b)
b² = 5/20
b² = 1/4
b = √(1/4)
b = 1/2
Since a = 20b, then;
a = 20 × 1/2
a = 10
Thus, from y = ab^(x), we have;
y = 10(½)^(x)