We know that the smaller base is x cm, the greater base is x+4 cm, and that the height is x/2 cm.
Since the area of a trapezium is given by
If we plug the expressions we have
If this must equal 84, we can solve for x as follows: start with
Multiply both sides by 4:
Subtract 336 from both sides:
We can divide both sides by 2 to make computation simpler:
Use the quadratic formula (or any mean you prefer) to solve this equation and get the solutions
We can't accept the negative solution, because it would imply
and we can't have negative side lengths. So, the answer is 12.
Answer:
The answer is B (AKA) 102
Step-by-step explanation:
180-78
one angle is 180 degrees
<u><em>Answer: The answer is C. $13.91</em></u>
<u><em>Step-by-step explanation:</em></u>
<u><em>The way i got my answer is </em></u>
<u><em>78.75+92.66=171.41</em></u>
<u><em>171.41÷13=13.18</em></u>
<u><em>Round to the nearest cent which 13.91</em></u>
You paid $4.76 total for 7 notebooks. To figure out how much each individual notebook cost, you divide the total cost by the number of things you bought, so
Cost of One Notebook = Total Cost of Notebooks / Number of Notebooks = $4.76 / 7 = $0.68
This is the unit rate.
To buy three notebooks, you just calculate the total cost of three notebooks at this price point, so
Cost of Three Notebooks = Cost of One Notebook * 3 Notebo0ks = $0.68 * 3 = $2.04
