1. Simplify brackets
3 - 4x + 5 + 6
2. Collect like terms
-4x + (3 + 5 + 6)
3. Simplify
-4x + 14
Answer:
r = 8
Step-by-step explanation:
Given that M is directly proportional to r² then the equation relating them is
M = kr² ← k is the constant of proportionality
To find k use the condition when r = 2 , M = 14
k = = =
M = r² ← equation of proportion
When M = 224, then
224 =r² ← multiply both sides by 2
7r² = 448 ( divide both sides by 7 )
r² = 64 ( take the square root of both sides )
r = = 8
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Answer: 40
Step-by-step explanation: -5 x -8 is 40 since the negatives cancel each other out, the product is positive :)