Last month, Luiza's bank statement said that she had money in her account. Her bank balance was 109.32 109.32109, point, 32 rubles. This month, Luiza's bank balance is − 87.12 −87.12minus, 87, point, 12 rubles. What does this mean?

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Complete Question

Last month, Luiza's bank statement said that she had money in her account 109.32 rubles. This month, Luiza's bank balance is − 87.12 rubles. What does this mean?

This means, for this month Luzia has no money in her bank account. Since Luzia's account balance is in a negative sign, it means that she is owing the bank a sum of 87.12 rubles which will be deducted anytime money is deposited into the bank account.

Step-by-step explanation:

From the question, we know that the amount of money in Luzia account last month based in her account statement = 109.32 rubles

This month her account balance reads -87.12

This means her account balance received a debit of money above the money in her account.

To calculate how much her bank debited her.

= 109.32 rubles + 87.12 rubles

=196.44 rubles.

Her bank debited her account for the sum of 196.44 rubles.

Therefore, when the bank debited her for 196.44 rubles, due to the fact that the money in her account was not up to that amount (insufficient) , it resulted in Luzia's bank account balance to be negative.

This means, for this month Luzia has no money in her bank account. Since Luzia's account balance is in a negative sign, it means that she is owing the bank a sum of 87.12 rubles which will be deducted anytime money is deposited into the bank account.

what the question so we can you out

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12