Answered

Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Get immediate and reliable solutions to your questions from a knowledgeable community of professionals on our platform. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

mariana averaged 71 on her first three exams. the first score was 69 and the second score was 2 less than the third score. what did she score on the second and third exam

Sagot :

Answer:

2nd: 71 3rd: 73

Step-by-step explanation:

if mariana averaged 71 on her first three exams, it means in total, she scored 71*3 (213 points). since mariana scored 69 for her first exam, the other two exam scores must be 213-69 (144).

using systems of equations, we can identify two equations:

x is the first test, y is the second test, so x<y

x+y=144

x-y=-2

2y=144-(-2)

2y=146

y=73

if you plug in y (73), you can solve for x

x+73=144

x=144-73

x=71

Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Thank you for trusting Westonci.ca. Don't forget to revisit us for more accurate and insightful answers.