Week 7 - Math 6 - Assessment answers

Question

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Answer 1

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.