The first one is B because, when you do area, you multiply, and 20 . 42 = 840 in.
Answer:
14.4 solved by doing 24(3/5)
Step-by-step explanation:
a ratio can be seen as division
3:5 = 3/5
Answer:
c
Step-by-step explanation:
4/6 is reduced to two thirds
Answer: 15 - (6 + 1) + 30 ÷ (3 × 2)
Step-by-step explanation:
The simplest way is just to [try check and revise]. Place parentheses on each two numbers and try.
However, there is a somewhat trick involved.
Normally, when a question asks for adding parentheses, the parentheses are normally placed on two numbers that don't usually operate together.
- For example, in this question, [15 - 6 + 1]. Normally, is should be 15-6 which is 9. Then 9+1 is 10. Also, usually when you add parentheses on -6+1, it will change signs into -(6-1). But, in this question, when we add parentheses, signs don't change. So it is -(6+1).
Hope this helps!! :)
We will have to use the formula for the area of a trapezoid on this problem, which is ( and are the bases of the trapezoid and is the height):
All we need to do is substitute the information we are given into our formula:
Now, let's just simplify the equation:
The missing base has a length of 13 units.