42 was divided by some number, then added to 11 next this sum was multiplied by 5, which gave a product of 125. find this number.

The desired such number is 3.

Step-by-step explanation:

Let the given such number  = m

Now, 42 is divided by m ⇒   is the desired expression.

Now, The quotient is added to 11.

⇒   is the desired expression.

The sum is again multiplied by 5.

⇒   is the desired expression.

The product is 125.

⇒   is the desired expression.

Now, solving for the value of m , we get:

⇒

or, m  = 3

Hence, the desired such number is 3.

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step-by-step explanation:

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f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

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