Answer:
3
+ 4
Step-by-step explanation:
If u = < x₁, y₁ > and v = <x₂ , y₂ > , then
u • v = x₁x₂ + y₁y₂
Given
u = < , - 1 > and v = < 3, - 4 >, then
u • v = 3 + (- 1)(- 4) = 3 + 4
The final answer will be a 3x3 matrix. So you'll have 3 rows and 3 columns.
Along row one, the values are: 10, 15, 20
Along row two, the values are: 45, -5, -35
Along row three, the values are: 55, 25, -15
all of which make up the final answer. Each value in bold is the result of multiplying the outer 5 by each value inside the original matrix given. In a sense, it's like using the distributive property, though we wont be adding any of the values (everything stays separated).
(a+b)^3 = a^3+b^3+3ab(a+b)
(a+b)^3 = (-1)^3
Answer:
12
Step-by-step explanation:
By ythagoras Theorem,
x^2 + 9^2 = 15^2
x^2 + 81 = 225
x^2 = 225 - 81
x^2 = 144
x = √144
x = 12
First, we have this equation which is 5/8m=12, so now I just need to divide 5/8 for both side to get m which equal 19.2. Hope it help!
