3 years ago

Please help and give right answers please!

Mathematics

1 answer:

trasher [3.6K]3 years ago

3 0

Answer:

Step-by-step explanation:

x * x = 7x

7 x 7 = 7 x 7

49 = 49

so if x is 7, the equation is true...

You might be interested in

I don’t know how to do this and my teacher doesn’t know how to teacher please help me

AnnyKZ [126]

Answer:

Yeah and i don't know how to answer that sorry

Step-by-step explanation:

you can't look it up some how?

8 0

2 years ago

What is 50+15d=125 equivalent to

zlopas [31]

Step-by-step explanation:

50-50+15d =125-50

15d = 75

15d/15=75/15

d=5

7 0

3 years ago

Read 2 more answers

Find the sum of a finite geometric sequence from n = 1 to n = 6, using the expression −2(5)n − 1.

vazorg [7]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=-2\\
r=5\\
n=6
\end{cases}
\\\\\\
S_6=-2\left( \cfrac{1-5^6}{1-5} \right)$