Answer:
1. The expression that represents the total number of DVDs Suzie has is d + 39
2. The expression for the amount Dave pays for t hours of practice in a month is 10 + 2 × t
3. The expression for the total cost for n people invited for the party is $50 + $5 × n
4. The expression for the perimeter of a square with side length, x is 4 × x
5. The expression for the total cost of pizza with n extra toppings is $8 + $2 × n
6. The expression for the total cost in phone charges after t months is $25 + t × $15
7. The expression for the total number of hockey sticks for n players is 4 × n
8. The relation that represent the term for each number pattern is given as follows;
Value = nth term of number
9. The relation for the perimeter of an equilateral triangle with side length k is given as follows;
Perimeter of an equilateral = 3 × Side length
∴ Perimeter of the given equilateral triangle = 3 × k
When k = 15, we have;
Perimeter of the equilateral triangle = 3 × 15 cm = 45 cm
10. a) The relation for the total cost of j jersey is $50 + $15 × j
b) The relation for the total cost of j jersey by the other company is $80 + $12 × j
c) The charges for 12 jerseys by the first company is $50 + $15 × 12 = $230
The charges for 12 jerseys by the first company is $80 + $12 × 12 = $224
Therefore, the second company will charge less if 12 jerseys are ordered
11. The real life situation that could be represented by each relation are;
a. n + 7
For every mass in grams of goods bought, n, we get a 7 gram mass of packaging
b. 4s + 5
The distance from a point covered by jogging at 4 m/s after s seconds while starting at 5 meters away from the point in the direction of jogging
12. a) The relation for the total number of music stand is n/2
b) The relation for the total number of chairs is n + 4
c) The relation for the total number of sheets of music is 7 × n
Step-by-step explanation:
