A . B = AxBx + AyBy + AzBz
s = 7i + j
t = 4i -9j
s.t = 7.4 + 1.-9
s.t = 28 - 9 = 19
Answer:
21.375
PS:
I could get my calculator to make the product as a fraction if you want.
Answer:
66
Step-by-step explanation:
First lets change the fractions so they have common denominators:
3/5 = 6/10
The bank was 1/10, after adding the pennies it was 6/10
6/10 - 1/10 = 5/10 = 1/2
This means 400 pennies filled 1/2 the piggy bank.
There are 2 halves (1/2) to a whole ( full piggy bank).
The piggy bank can hold 400 x 2 = 800 pennies.
Answer:
step-by-step explanation:
first you divide 24 by six to get the number needed for the next step
24/6 = 4
then you times eight and four
8*4 = 32
which gets you the number 32
which also means that 32 dollars are in jamal's brother bank account
hope this helps! :)