Course: Lumos StepUp - PARCC Online Practice And Assessments - Grade 7 Mathematics
Jasmine has opened a bank account with an initial deposit of $200. She has also received a debit card to use for her account. Each week she is able to save $10 to deposit in the account. Her account balance (the amount of money in the account) is her initial deposit of $200 plus any deposits she makes minus any purchases she makes using her debit card.
Three weeks after Jasmine opened her account, she has made two purchases. She bought a pair of shoes that cost $15.75, and she purchased some music online for a cost of $5.50. Which of the following expressions would correctly represent the amount of money in her account after three weeks:
$200 + $15.75 + $5.50
$200 + (-$15.75) + (-$5.50)
$200 + $15.75 + $5.50 + 3($10)
$200 + (-$15.75) + (-$5.50) +3($10)
Domain: Expressions & Equations
Theme: Solve real-life and mathematical problems using numerical and algebraic expressions and equations
Description: Use variables to represent quantities in a real-world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities.
All the 7th graders in Jennifer’s school take art class as well as math class. The variability (range) of students’ grades in art class is about the same as the variability (range) of students’ grades in math class. However, the mean of students’ grades in math class is significantly lower than that in art class. Which of the following tables of students’ grades in each class would represent this situation correctly?
Domain: Statistics & Probability
Theme: Draw informal comparative inferences about two populations
Description: Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability. For example, the mean height of players on the basketball team is 10 cm greater than the mean height of players on the soccer team, about twice the variability (mean absolute deviation) on either team; on a dot plot, the separation between the two distributions of heights is noticeable.
Which of the following is an equivalent expression to:
−3b[2c + 4 − 5t + (−4c)]
−12b +15bt −18bc
−12b(−2c − 5t)
−12b +15bt − 3b(−2c)
−3b(−t − 2c)