3 years ago

HELPP help someone please !

Mathematics

1 answer:

Zina [86]3 years ago

3 0

Answer:

For 0–> 2

For 2–> 2.5

For 4–> 3

For 6–> 3.5

For 8–> 4

For 10–> 4.5

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uysha [10]

For this case we must solve the following equation:

$\frac {5} {7} + \frac {x} {2} = 2- \frac {x} {7}$

So, we have:

$\frac {10 + 7x} {14} = \frac {14-x} {7}\\7 (10 + 7x) = 14 (14-x)$

We apply distributive property to both sides of the equation:

$70 + 49x = 196-14x$

We add 14x to both sides of the equation:

$70 + 49x + 14x = 196\\70 + 63x = 196$

We subtract 70 to both sides of the equation:

$63x = 196-70\\63x = 126\\x = \frac {126} {63}\\x = 2$

So, the solution is: $x = 2$

Answer:

$x = 2$

8 0

3 years ago

What is the sum of the first 5 terms of geometric series with a1=10 and r=1/5

steposvetlana [31]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=10\\
n=5\\
r=\frac{1}{5}
\end{cases}$

$\bf S_5=10\left( \cfrac{1-\left( \frac{1}{5} \right)^5}{1-\frac{1}{5}} \right)\implies S_5=10\left( \cfrac{1-\frac{1}{3125}}{\frac{4}{5}} \right)
\\\\\\
S_5=10\left( \cfrac{\frac{3124}{3125}}{\frac{4}{5}} \right)\implies S_5=10\cdot \cfrac{781}{625}\implies S_5=\cfrac{1562}{125}$

7 0

3 years ago

Describe how to locate the ordered pair(6,8)on a coordinate plane.begin your description at the origin

tatyana61 [14]

Start from (0,0), and since x is 6, move 6 units to the right, and since y is 8, move 8 units up.

3 0

3 years ago

Read 2 more answers

Hahaahaahhahahahahhaha no one can do this I bet but I need help my teacher explained it in a confusing way

Olegator [25]

Answer: question 5 is C

Question 6 is C