Mathematics, 29.07.2019 10:00 lizzyhearts

4x-15y=-17-x+5y=-13 $- 4x - 15y = - 17 \\ - x + 5y = - 13$

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To solve this system of linear equations we need a little trick called elimination steps are below

we are given the following system of equations
- 4x - 15y = - 17

if you look at the x variables in both equations you can see that we can easily eliminate them by multiplying the bottom equation by -4 as so
- 4x - 15y = - 17

simplify and we get
- 4x - 15y = - 17

now we can combine like terms on each side with the x's cancelling and get

- 35y = 35

now divide off -35
y = - 1

great now we can go back to our original system and pick a equation and substitute y back in to find x lets use

- x + 5y = 13

so now we substitute y and get
- x + 5( - 1) = 13

now we put x and y into one coordinate (x,y)
so now our FINAL ANSWER IS
(-17,-1)

Answer from: Quest

"it's not the heat, it's the humidity". that's a partly valid phrase you may have heard in the summer, but it's actually both. the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. this has important considerations for the human body's comfort. when the body gets too hot, it begins to perspire or sweat to cool itself off. if the perspiration is not able to evaporate, the body cannot regulate its temperature. evaporation is a cooling process. when perspiration is evaporated off the body, it effectively reduces the body's temperature. when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases. in other words, the human body feels warmer in humid conditions. the opposite is true when the relative humidity decreases because the rate of perspiration increases. the body actually feels cooler in arid conditions. there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation:

75% of the temperatures are below what value? how do you know? 75% of the temperatures are above w

Answer from: Quest

b). 4320 have a nice day

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4x-15y=-17-x+5y=-13[tex] - 4x - 15y = - 17 \\ - x + 5y = - 13[/tex]...

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