Suppose that the functions s and t are defined for all real numbers x as follows. s (x)=x-2
t(x) = 4x+3
Write the expressions for (s +t)(x) and (s – t)(x) and evaluate (s. t)(1).

Step-by-step explanation:

Given

Solving (a): (s + t)(x)

This is calculated as:

Collect like terms

Solving (b): (s - t)(x)

This is calculated as:

Collect like terms

Solving (b): (s . t)(1)

First, we calculate (s.t)(x)

This is calculated as:

So, we have:

Substitute 1 for x

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step-by-step explanation:

gayule

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.