Question

I need further explanation on number 3 please enlighten me will give 5 stars if you give me a good explanation ⭐️⭐️⭐️⭐️⭐️

Answer 1

To evaluate an expression at a given value means that you substitute the given value anywhere you see the variable. For example, if the expression is:

$x+1$

and the problem asks you to evaluate the expression at x=9, then we substitute x=9 and get:

$9+1=10.$

Now, question number 3 asks us to evaluate

$(1.42+t)\times u+\frac{0.42}{v},$

at t=13.5, u=7, and v=6. Therefore substituting the given values we get:

$\begin{gathered} (1.42+13.5)\times7+\frac{0.42}{6}=(14.92)\times7+0.07 \\ =104.44+0.07=104.51. \end{gathered}$

Answer: 104.51