For the function y=-1+6cos(2pi/7(x-5)) what is the minimum value?

The minimum value of y is -7

Step-by-step explanation:

Given:

We are given a cosine function.

We need to find minimum value of function.

Here y is depends on cosine function.

y is minimum when cosine is minimum because y is directly proportional to cosine function.

Minimum value of cos x is -1

Therefore, For minium value of y

Minimum value of y

Hence, The minimum value of y is -7

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: