We have the following vectors:
u = (a, b)
v = (c, d)
We observe that the vectors form an angle of 90 degrees.
Therefore, the product u.v is equal to zero.
We have then:
u.v = (a, b). (c, d) = 0
u.v = ac + bd = 0
ac = -bd
Answer:
B) ac = -bd
It’s so blurry that we can’t see a word written there, sorry
Answer:
£152
Step-by-step explanation:
Solution:
Find out how much is 1/3 of 255 coins:
255 x 1/3 = 85
Since you know how many 50p and £1 coins there are, the remaining of the coins after the 50p and £1 get deducted from the total coins.
255 - 85 - 110 = 60
There are 60 20p coins, 85 £1 coins and 110 50p coins.
Find out the total value by calculating them all altogether.
60 x 20p = 1200
85 x 100p which is £1 = 8500
110 x 50p = 5500
I did them separately so that it wouldn't be so confusing.
Convert them into £, then after that add them up.
£12 + £85 + £55 = £152
Answer:
The answer to your question is h (g(n)) = 3n² - 12n + 1
Step-by-step explanation:
h(n) = 3n + 1
g(n) = n² - 4n
Find (hg)(n)
h(g(n)) = 3( n² - 4n) + 1 substitution
h (g(n)) = 3n² - 12n + 1 expand
25%-y=costs that would be taking the percentage from the original cost
