Please help me as soon as possible.

Mathematics

1 answer:

IrinaVladis [17]3 years ago

5 0

$\begin{array}{llll} x~-2y=-13\\ 5x+2y=-17\\ \cline{1-1} 6x+0y=-30 \end{array}\qquad \implies 6x=-30\implies x=\cfrac{-30}{6}\implies x=-5 \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{substituting on the 1st equation}}{(-5)-2y=-13\implies }-2y=-8\implies y = \cfrac{-8}{-2}\implies y = 4 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (-5~~,~~4)~\hfill$

You might be interested in

A bank gives each new customer a 4-digit code number which allows the new customer to create their own password. The digits are

sladkih [1.3K]

Answer:

firstly it is a four number combo with no repeating numbers so it has to include 5 but if you mean it like you said it 0

Step-by-step explanation:

sry i read it wrong the first time

3 0

2 years ago

Read 2 more answers

Plot another sin function of 20% higher frequency over the same range.

Ostrovityanka [42]

Step-by-step explanation:

The frequency of sine function is given by the number of periods in a given range. For example:

Frequency for $sin(x)$ is 1 in the interval $[0,2\pi]$ .

This means that, if we want another sine function with frequency 20% higher, we need that function to have a frequency of 1.2 in the interval $[0,2\pi]$ .

To be easier to see we will consider interval $[0,10\pi]$ instead of $[0,2\pi]$ . In this interval $sin(x)$ has 5 periods, therefore our new sine function should have 6 periods.

Finally, as we can see in the graph, the function $sin(\frac{6}{5}x )$ (in blue) has a frequency 20% higher than $sin(x)$ (in red). This can be easily seen counting the number of periods between 0 and $10\pi$ for both functions. 5 for $sin(x)$ and 6 for $sin(\frac{6}{5} x)$ .