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Chapter 1: Q20. (page 18)

Evaluate the expression when x=3,鈥�y=4,鈥塧苍诲z=5

20.0.25(y+x)

Short Answer

Expert verified

The value of expression is1.75.

Step by step solution

01

Step-1 – Order of operations

To evaluate any expression involving more than one operation, follow the below order of operations:

  • First evaluate expressions inside grouping symbols like parentheses ( ) or brackets [ ].
  • Evaluate the exponents.
  • Perform Multiplication and division from left to right.
  • Perform addition and subtraction from left to right.
02

Step-2 – Substitute the values

To evaluate the expression 0.25(y+x), substitute 3 for x and 4 for y, and simplify further using the order of operations as shown below,

0.25(y+x)=0.25(4+3)=0.25(7)

03

Step-3 – Multiply the numbers

To simplify further, multiply the resulting numbers to get

0.25(y+x)=0.25(4+3)=0.25(7)=1.75

So, the value of the expression is 1.75.

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