Solve 2200 ÷ 40 a. 500 b. 50 c. 60 d. 55
2 answers:
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Check the picture below.
notice AB ⟂ BC , whilst ∡B = 30°.
now, if we run a perpendicular line from C to AB, it'll be a 90° angle at M, however ∡AMC has to be 105°, so it has to be slanted more towards A, like in the picture, and surely you already know which one is the shortest.
notice AB ⟂ BC , whilst ∡B = 30°.
now, if we run a perpendicular line from C to AB, it'll be a 90° angle at M, however ∡AMC has to be 105°, so it has to be slanted more towards A, like in the picture, and surely you already know which one is the shortest.
If a number is 40% more than another number, we can say that the new number is equivalent to the sum of the old number and 40% of the old number. Let's try to represent this as an equation. First, let's convert the percentage to a fraction:
Defining as the new number and
as the old number, we can say:
Also, we can say:
To solve, let's substitute the first equation into the second equation for and simplify.
- Substitute
- Get terms over common denominator
- Simplify
- Multiply both sides by 5
We now have found the old number. Using the second equation we found near the beginning, let's find .
The numbers are 35 and 49.