MathsGee Answers is Zero-Rated (You do not need data to access) on: Telkom |Dimension Data | Rain | MWEB
First time here? Checkout the FAQs!
Institutions: Global | Ekurhuleni Libraries | Joburg Libraries | Tshwane Libraries | Invest in Zim

MathsGee is Zero-Rated (You do not need data to access) on: Telkom |Dimension Data | Rain | MWEB

1 like 0 dislike
For her calculus class, Marie has scored 88, 78, and 95 on three of her tests so far. What is the minimum score Marie needs to receive on her 4th test in order to have an average of 90?
in Data Science by Wooden (1,878 points)
78% Accept Rate

1 Answer

1 like 0 dislike
Best answer
For her to get an average of $90$, let her last score be $x$.


Making $x$ subject of formula results in:


Simplifying means that the score she is supposed to get is:

by Wooden (1,878 points)

Welcome to MathsGee Answers, a free online study network where students can ask, answer, and explore 24/7 for improved outcomes.

MathsGee Supporting City of Joburg

Enter your email address:

MathsGee Tools

Math Worksheet Generator

Math Algebra Solver

Trigonometry Simulations

Vectors Simulations

Matrix Arithmetic Simulations

Matrix Transformations Simulations

Quadratic Equations Simulations

Probability & Statistics Simulations

PHET Simulations

Visual Statistics

Interactive Courseware

ZeroEd Search Engine

Article Rewriter Tool

Word Counter Tool

Other Tools

STEM Gender Equality | ZOOM | Slack | eBook