Week 7 - Math 6 - Assessment answers
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1. What is the value of 8 + 3 x 4 - 2?
To solve this expression, we first need to perform the multiplication, then addition, and finally subtraction.
8 + 3 x 4 - 2
= 8 + 12 - 2
= 20 - 2
= 18
Therefore, the answer is 18.
2. Solve the equation: 3(2x + 5) = 21.
To solve this equation, we need to distribute the 3 on the left side of the equation and then solve for x.
3(2x + 5) = 21
6x + 15 = 21
6x = 6
x = 1
Therefore, the solution to the equation is x = 1.
3. Calculate the area of a rectangle with a length of 8 cm and a width of 5 cm.
To calculate the area of a rectangle, we use the formula: Area = length x width.
Area = 8 cm x 5 cm
Area = 40 cm^2
Therefore, the area of the rectangle is 40 square centimeters.
4. If a car travels 300 miles in 5 hours, what is its average speed?
To find the average speed, we divide the total distance traveled by the total time taken.
Average speed = Total distance / Total time
Average speed = 300 miles / 5 hours
Average speed = 60 miles per hour
Therefore, the average speed of the car is 60 miles per hour.