Answer:
as a tennis player, i know this
Step-by-step explanation:
there is no triples loll
Answer:
3/10
Step-by-step explanation:
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➷ Standard deviation = 
Substitute the values in:
= 8.1975...
This can be rounded to give an approximate answer of 8.2
The answer is option A.
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No.d
37,619
I hope that this helps you and please mark me as the brainliest.
Answer:
C
Step-by-step explanation:
the area of a triangle is
baseline × height / 2
so, we know in our case
b(b+12) = 189 cm²
b² + 12b - 189 = 0
let's try to solve this by completing the square.
that means we try to find the expression
(b + k)² + c
that is equal to
b² + 12b - 189
(b + k)² + c = b² + 2kb + k² + c = b² + 12b - 189
so,
2k = 12
k = 6
and then
k² + c = -189
6² + c = -189
36 + c = -189
c = -225
(b + 6)² - 225 = 0
(b + 6)² = 225
b + 6 = 15
b = 9
so, the baseline b = 9 cm.
the height b+12 = 9+12 = 21 cm.
