2 years ago

What is negative 63 divided by negative 7

Mathematics

2 answers:

Inga [223]2 years ago

8 0

Answer:

Step-by-step explanation:

negative divided by a negative is a positive, 63/7 is nine :)

Yuri [45]2 years ago

3 0

Answer: $9$

Step-by-step explanation:

Multiply $(-7)*9$ to get $-63$ .

When you multiply and negative and a negative you get a positive.

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2 years ago

What is the term of a 7-term geometric series if the first term is -11 the last term is -45,056 and the common ratio is -4

shutvik [7]

I assume you mean to ask how to find the sum of the seven terms?

You have

$a_2=ra_1$
$a_3=ra_2=r^2a_1$
$a_4=ra_3=r^3a_1$
...
$a_7=ra_6=r^6a_1$

So the sum is

$a_1+ra_1+r^2a_1+\cdots+r^6a_1=a_1(1+r+r^2+\cdots+r^6)=a_1\times\dfrac{1-r^7}{1-r}$

You know that $a_1=-11$ and $r=-4$ , so the sum is equal to

$-4\times\dfrac{1-(-4)^7}{1-(-4)}=-13108$