Tip - for finding the surface area of a triangle put two of them together so it forms a square find the area of that square and divide it by 2
Answer:
77
Step-by-step explanation:
the angles opposite of each other are congruent
Okay so say that x=amount invested with 6% and y=amount invested with 9%
x+y=8,500 so > x=8500-y
6%=0.06 <span>9%=0.09</span>
0.06x +0.09y=667.5 (Substitute in x=8500-y so only numbers and y)
0.06(8500-y)+0.09y=667.5 (expand brackets)
510-0.06y+0.09y=667.5 (-510)
0.03y=117.5 (/0.03)
$3916.67=Y ->9%
X=8500-Y
x=$4583.33 ->6%
9 = 90 (means 10 has been multiplied by 9)
8 = 72 ( means 9 has been multiplied with 8)
7 = 56 ( means 8 has been multiplied with 7)
6 = 42 ( means 7 has been multiplied with 6)
Then
3 = 12 ( means 4 has been multiplied with 3)
I hope that from the above deductions you have come to know the relation. I hope the answer has come to your help.