3 years ago

Can someone answer these 3 problems. (7+7-4)x5 4+1(2-1) (4+2) + ((5+1) x 2) +1

Mathematics

1 answer:

bagirrra123 [75]3 years ago

5 0

Answer:

1. 50

2. 5

3.19

Step-by-step explanation:

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What is the first term in a geometric sequence if the common ratio is − 2 and the sum of the first six terms is −105?

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$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
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\end{cases}$

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3 years ago

If 20% of a number is 8, find 10% of that number.

Gemiola [76]

Answer:

20%=8

10%=?

by cross multiplications,

10×8=80

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Hence the answer is 4.

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