6.58+7.64-10.006 adding and subtracting decimals

4.214

Step-by-step explanation:

Original Equation:

6.58 + 7.64 - 10.006

Add 6.58 to 7.64

14.22

Subtract 10.006 from 14.22

4.214

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The angle between them = 52.1°

Step-by-step explanation:

∵ The position vector of the first point is

∵ The position vector of the second point is

∵ The magnitude of the first = √(1²+5²) = √26

∵ The magnitude of the second = √(6²+3²) = √45

∵ The scalar product of them = (1 × 6) + (5 × 3) = 6 + 15 = 21

∵ cosФ = scalar product/(magnitude 1st × magnitude 2nd)

∴ cosФ = 21/(√26 × √45) = 0.61394

∴ Ф = 52.1°