Answer:
(47+21√5)/2
Step-by-step explanation:
Given the expression
7+3√5/7-3√5
= 7+3√5/7-3√5 * (7+3√5)/(7+3√5)
= 49+21√5+21√5+9(5)/[7(7)-9(5)]
= 49+42√5+45/49-45
= 94+42√5/4
= 2(47+21√5)/4
=(47+21√5)/2
Hence the required expression is (47+21√5)/2
Perimeter is used to find the total length. And its units are not in squares.
Areas are used to measure the number of unit squares needed to cover a flat surface. And its unit is in squares, for e.g. meter square, cm square etc .
So out of the two given options, area is used to measure the square units covered by the flat surface .
We are given that:
Given the expression:
Evaluate the expression by substituing the given values in.
Simplify the expression.
- Negative × Negative = Positive
- Negative × Positive = Negative
Therefore, the value of the expression is 25.
20% off means you paid only 80% of the original price.
0.8x=40
x=40÷0.8=50
so the original price is 50
Answer:
8 hours, and 25 mins
Step-by-step explanation:
7:30 am to 11:55am= 4 hours, 25 mins
1:00pm to 4:50 pm= 3 hours, 50 mins
Add together
Answer: 8 hours, and 25 mins.