Vamos calcular quantos metros de corda Maria comprou na segunda vez:
33 - 21 = 12
Ela pagou R$ 9,60 a mais na segunda compra do que na primeira.
Logo, Maria pagou R$ 9,60 em 12 metros
Agora vamos calcular quanto ela pagou por metro:
9,60 ÷ 12 = 0,80
R$ 0,80 por metro
Para saber quanto Maria gastou na primeira compra multiplicamos os 21 metros pelo seu valor unitário:
21 × 0,8 = 16,80
Resposta: R$ 16,80 Letra B
Answer:
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Answer:
i dont know but can you pick me brainiest
Step-by-step explanation:
We have been given that a rectangular auditorium seats 1702 people. Also, the number of seats in each row exceeds the number of rows by 9.
Let us assume that there are x rows in the auditorium. Therefore, there must be (x+9) seats in the each row. This will also be equal to the number of columns in the auditorium.
Therefore, we can set up an equation as:

We can now factor this quadratic as shown below:

Upon solving this equation, we get:

Since number of rows cannot be negative. Therefore, there must be 37 rows in the auditorium. And hence, the number of seats in each row will be 37+9=46 seats.
Answer:
-- Modulus
--- Argument
Step-by-step explanation:
Given

Required
Determine the modulus and the argument
We have that:

Expand:


A complex equation can be expressed as:

Where


Where

So:
becomes

By comparison:

This gives:



Divide through by i

Hence, the modulus, z is:

And the argument
is
