Presentation is loading. Please wait.

Presentation is loading. Please wait.

Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79.

Published byRoy Bryant Modified over 9 years ago

Similar presentations

Presentation on theme: "Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79."— Presentation transcript:

1 Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79 per song, and company B charges $.99 per song. Write an equation that models this situation. SOLUTION Write a verbal model. Then write an equation.

2 Write a model using standard form EXAMPLE 6 0.79 x + 0.99 y = 30 ANSWER An equation for this situation is 0.79x + 0.99y = 30.

3 GUIDED PRACTICE for Example 6 10. What If? In Example 6, suppose that company A charges $.69 per song and company B charges $.89 per song. Write an equation that models this situation. ANSWER An equation for this situation is.69x +.89y = 30.

Download ppt "Write a model using standard form EXAMPLE 6 Online Music You have $30 to spend on downloading songs for your digital music player. Company A charges $.79."

Similar presentations

EXAMPLE 1 Standardized Test Practice SOLUTION Substitute several values of h into the equation C = 10 + 7h and solve for C.Then identify the table that.

EXAMPLE 1 Standardized Test Practice SOLUTION Substitute several values of h into the equation C = h and solve for C.Then identify the table that.
Write an equation in point-slope form

Write an equation in point-slope form
Example 1 Solve the linear system. Solving a Linear System by Graphing y+x = 5 y = 2x2x 1 – SOLUTION STEP 1 Graph both equations as shown. STEP 2 Estimate.

Example 1 Solve the linear system. Solving a Linear System by Graphing y+x = 5 y = 2x2x 1 – SOLUTION STEP 1 Graph both equations as shown. STEP 2 Estimate.
EXAMPLE 3 Standardized Test Practice SOLUTION

EXAMPLE 3 Standardized Test Practice SOLUTION
EXAMPLE 5 Solve a multi-step problem LIBRARY

EXAMPLE 5 Solve a multi-step problem LIBRARY
EXAMPLE 3 Solve a multi-step problem Many businesses pay website hosting companies to store and maintain the computer files that make up their websites.

EXAMPLE 3 Solve a multi-step problem Many businesses pay website hosting companies to store and maintain the computer files that make up their websites.
EXAMPLE 2 Solve a matrix equation SOLUTION Begin by finding the inverse of A. 4 7 1 2 = Solve the matrix equation AX = B for the 2 × 2 matrix X. 2 –7 –1.

EXAMPLE 2 Solve a matrix equation SOLUTION Begin by finding the inverse of A = Solve the matrix equation AX = B for the 2 × 2 matrix X. 2 –7 –1.
Write decimal as percent. Divide each side by 136. Substitute 51 for a and 136 for b. Write percent equation. Find a percent using the percent equation.

Write decimal as percent. Divide each side by 136. Substitute 51 for a and 136 for b. Write percent equation. Find a percent using the percent equation.
Standardized Test Practice EXAMPLE 4 ANSWER The correct answer is B. DCBA Simplify the expression 4(n + 9) – 3(2 + n). 4(n + 9) – 3(2 + n) = Distributive.

Standardized Test Practice EXAMPLE 4 ANSWER The correct answer is B. DCBA Simplify the expression 4(n + 9) – 3(2 + n). 4(n + 9) – 3(2 + n) = Distributive.
Standardized Test Practice

Standardized Test Practice
EXAMPLE 5 Solve a multi-step problem Recording Studio

EXAMPLE 5 Solve a multi-step problem Recording Studio
EXAMPLE 5 Simplify a mathematical model Digital Photo Printing You send 15 digital images to a printing service that charges $. 80 per print in large format.

EXAMPLE 5 Simplify a mathematical model Digital Photo Printing You send 15 digital images to a printing service that charges $. 80 per print in large format.
EXAMPLE 5 Find permutations of n objects taken r at a time Music You are burning a demo CD for your band. Your band has 12 songs stored on your computer.

EXAMPLE 5 Find permutations of n objects taken r at a time Music You are burning a demo CD for your band. Your band has 12 songs stored on your computer.
Standardized Test Practice

Standardized Test Practice
EXAMPLE 1 Write an equation of a circle Write the equation of the circle shown. The radius is 3 and the center is at the origin. x 2 + y 2 = r 2 x 2 +

EXAMPLE 1 Write an equation of a circle Write the equation of the circle shown. The radius is 3 and the center is at the origin. x 2 + y 2 = r 2 x 2 +
Tell whether the equation represents direct variation.

Tell whether the equation represents direct variation.
EXAMPLE 7 Solve a multi-step problem Printing Costs You are creating brochures that promote your school’s sports events. You pay $20 for computer time.

EXAMPLE 7 Solve a multi-step problem Printing Costs You are creating brochures that promote your school’s sports events. You pay $20 for computer time.
EXAMPLE 1 Solving a Real-World Problem Music Club You pay $9.95 to join an Internet music club. You pay $.99 for each song that you download. Your cost.

EXAMPLE 1 Solving a Real-World Problem Music Club You pay $9.95 to join an Internet music club. You pay $.99 for each song that you download. Your cost.
Write and graph a direct variation equation

Write and graph a direct variation equation
Standard Form What you’ll learn To graph linear equations using intercepts To write linear equations in standard form x-intercept, standard form of a linear.

Standard Form What you’ll learn To graph linear equations using intercepts To write linear equations in standard form x-intercept, standard form of a linear.

Similar presentations

Ads by Google