Find the value of x if the arithmetic mean of 3 and 3x+5 is 8?
1 answer:
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Answer:
E and F
Step-by-step explanation:
Using the rule of exponents
×
⇔
, then
×
=
→ F
or
×
= 625 ×
→ E
Answer:
a
Step-by-step explanation:
Using Pythagoras' identity on the right triangle
let x be the other leg to be found, then
155² = 124² + x²
24025 = 15376 + x² ( subtract 15376 from both sides )
8649 = x² ( take the square root of both sides )
= x
Hence x = 93 cm ← length of other leg → a