6 * 7 = 42 so then you take and divide
42/3 = 14
Answer:
a = 4.5 units
b = 7.5 units
Step-by-step explanation:
By using mean proportional theorem in the ΔACB,
ΔACB ~ ΔADC ~ ΔCDB
a =
a = 4.5
Since a = 4.5
b² = 4.5 × 12.5
b = √56.25
b = 7.5 units
Therefore, a = 4.5 units and b = 7.5 units will be the answer.
A1=6*1-12=-6 arithmetic sequence
a14=6*14-12=72
sum =n(a(1)+a(n))/2
sum =14*(-6+72)/2=462
8x12=96 4x34=136 136+96=232 232/2=116 answer=116
I googled it because I wasn’t sure if there’s decimals needed but with the raw number I got -0.69333333333
Hope it helped.