babygirlmiller

19.04.2021 • 

Mathematics

1. If a varies directly with the square of b, and b in turn varies inversely with d, if a is 90 when d is 5: a. write the variation equation

b. find a when d is 9.

2. Find the equation of the line that passes through (3.8, -1.2), (2.2, 3.1).

3. The standard fare for a taxi in one city is $5.50, plus $0.30 per mile. Write the linear equation that describes the cost of a cab ride in terms of the length of the ride in miles. Then use your equation to find the cost of a 6-mile ride, 8.5 mile ride and 12-mile ride.

Ответ:

breana758

06.04.2021

Mathematics

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g(x) = Negative two-fifths(10)x

Step-by-step explanation:

In order to reflect a function over the x-axis, you have to multiply the function by minus one.

Given the function:

f(x) = 2/5(10)^x

Its reflection over the x-axis is:

-f(x) = -2/5(10)^x = g(x)

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