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7th grade math review

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  • What is the MAD?
    find the mean, find the distance each point is from the mean, then find the average of those numbers
  • Find the area of a triangle with a base of 3cm and a height of 8cm.
    (1/2) 3 x 8 = 12 cm squared
  • Solve: 2x - 7 = -6
    x = 1/2
  • Solve: 15n - 25 > 150
    n >11.67
  • What does the "m" represent in the equation y = m x + b?
    Slope, rate of change, rise/ run
  • What is "slope intercept form"?
    y = m x + b
  • What is the area of a rectangle with a width of 3w and a length of 4?
    A = l x w A = 12w
  • -5 + 8 = ? (no calculator!)
    3
  • Who is the best sub at BMS?
    Mrs. Krebs!!
  • What is a rational number?
    A number that can be expressed as a fraction
  • How do you express 76% as a fraction? (don't simplify)
    76/100
  • Solve: 53 + z + 18 = 180
    z = 109
  • Area is measured in what type of units?
    squared
  • What is the mode?
    most common number (can be no mode, or more than 1 mode)
  • Absolute value
    distance the number is from 0 (trick: make it positive)
  • What is the mean?
    average/ add all numbers, divide by the number of numbers
  • Perimeter is measured in what type of units?
    cm, m, inches (not squared or cubed)
  • Simplify: 3s + 3 + 2s - 9 = ?
    5s - 6
  • Solve: (2/3)x = 266
    x = 399
  • How can you solve a proportion?
    cross multiply, then divide/ butterfly method
  • What is the IQR?
    Q3 - Q1 = IQR
  • What does the "b" represent in y = m x + b?
    y intercept/ starting point/ initial value
  • How do you express probability? What is the correct notation?
    P ( ) =
  • Lily paid $6 for 3/8 lb of nuts. What is the cost of 1 lb?
    $16
  • What is the sample space of a probability question?
    All of the possibilities
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