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Chapter 1: Q84. (page 18)

PREREQUISITE SKILL

Evaluate each expression if a=2,b=-34, andc=1.8.

84. 25b+1

Short Answer

Expert verified

Expression 25b+1 results into 710

Step by step solution

01

- Order for simplification 

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

- Substitute given values

Substitute -34for b into given expression

25b+1=25-34+1

03

- Simplify 25-34+1

To evaluate, firstly perform multiplication and finally addition from left to right to get

25鈭�34+1=鈭�2脳35脳4+1=鈭�310+1=鈭�3+1010=710

Thus, 25b+1=710

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Most popular questions from this chapter

FIREWORKS

Suppose you are about a mile from a firework display. You count 5 seconds between seeing the light and hearing the sound of the firework display. You estimate the viewing angle is about 4掳. Using the information at the left, estimate the width of the firework display.

Information at the left

To estimate the widthw in feet of a firework burst, use the formula w=20At. In this formula,A is the estimated viewing angle of the firework display andt is the time in seconds from the instant you see the light until you hear the sound.

The amount of pollutants saved by riding a bicycle rather than driving a car is calculated by adding the organic gases, carbon monoxide, and nitrous oxides emitted. To find the pound of pollutants created by starting a typical car 10 times and driving it for 50 miles, find the value of expression 52.84脳10+5.955脳50454

Simplify each expression

14. 9p-2n+4p+2n

Find the value of each expression

9+35-7梅3

Write expressions having values from one to ten using exactly four 4s. You may use any combination of the operation symbols +,-,脳,梅,and/or grouping symbols, but no other numbers are allowed. An example of such an expression with a value of zero is 4+4-4+4
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