Chapter SH, Problem 1.4EP

To determine

To evaluate:the given expression by using the given value.

Answer to Problem 1.4EP

  $3y\left(2z+5x\right)-7=-259$ .

Explanation of Solution

Given:

The given expression is $3y\left(2z+5x\right)-7$ .

The given value is $x=2.2,y=-4,z=5$ .

Calculation:

As the given expression is $3y\left(2z+5x\right)-7$ .

Now, substitutes the given valueexpression. Therefore,

  $\begin{array}{l}3y\left(2z+5x\right)-7\left\{\text{given expression}\right\}\\ =3\left(-4\right)\left(2\left(5\right)+5\left(2.2\right)\right)-7\left\{\text{substitutes these value}\right\}\\ =-12\left(10+11\right)-7\{\text{simplify}}\\ =-12\left(21\right)-7\{\text{simplify}}\\ =-252-7\{\text{simplify}}\\ =-259\end{array}$

Hence, the value ofgiven system of equation is $3y\left(2z+5x\right)-7=-259$ .