Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 1: Q18. (page 30)

Evaluate each expression if a=-5, b=6 and c=2.8

-4b

Short Answer

Expert verified

The absolute value of expression is 24

Step by step solution

01

Step1- Order of evaluation

To evaluate any expression involving one operation, follow the below order of operation

  • First replace the algebraic expression inside the grouping symbols like matrix brackets () with numeric expression
  • Perform multiplication in the bracket
  • Evaluate the absolute value
02

Step2- Simplify the expression inside grouping symbol

To evaluate the value of given expression, simply the expression inside the bracket and then find the absolute value of expression as shown below

|−4b|=|−4×6|=|−24|

03

Step3- Find the absolute value of expression inside the bracket

The absolute value of |−24|=24

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Find the value of each expression.

-4+57-23

MEDICINE

Suppose a patient must take a blood pressure medication that is dispensed in 125-milligram tablets. The dosage is 15 milligrams per kilo gram of body weight and is given every 8 hours. If the patient weighs 25 kilograms, how many tablets would be needed for a 30-day supply? Use the formula n=24d÷8b×15÷125, wheren is the number of tablets,d is the number of days the supply should last, andb is the body weight of the patient in kilograms.

Find the value of each expression

7-20÷5

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°. 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.

Use the following information.

Simple interest is calculated using the formula I=prt, where p represents the principal in dollars, rrepresents the annual interest rate, and trepresents the time in years. Find the simple interest Igiven each of the following values.

localid="1645019360494" p=$31,000,r=212%,t=18months
See all solutions

Recommended explanations on Math Textbooks

Decision Maths

Read Explanation

Probability and Statistics

Read Explanation

Calculus

Read Explanation

Mechanics Maths

Read Explanation

Pure Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free