Answer:
x=1 and y=−2
Step-by-step explanation:
Multiply the first equation by 9,and multiply the second equation by -8.
9(−7x−8y=9)
−8(4x−9y=22)
Becomes:
−63x−72y=81
−32x+72y=−176
Add these equations to eliminate y:
−95x=−95
Then solve−95x=−95for x:
−95x
−95
=
−95
−95
(Divide both sides by -95)
x=1
Now that we've found x let's plug it back in to solve for y.
Write down an original equation:
−7x−8y=9
Substitute1forxin−7x−8y=9:
(−7)(1)−8y=9
−8y−7=9(Simplify both sides of the equation)
−8y−7+7=9+7(Add 7 to both sides)
−8y=16
−8y
−8
=
16
−8
(Divide both sides by -8)
y=−2
Yea. The text book is either wrong or it knows something that we don't. Like as to why they would need to have two more feet. You're right though
Data can be analysed in a situation when one wants to know how increase in price has an effect on purchasing power.
<h3>What is a trend?</h3>
It should be noted that a trend simply means the general direction or price over a period of time. A situation when I need data was when I wanted to know how increase in prices had an effect in one's purchasing power.
To get the data, I had to take the prices of goods when there was no inflation and prices when there was inflation and how they had an impact on income.
It showed that an inverse relationship existed as an increase in prices had a negative impact on one's purchasing ability.
Learn more about data on:
brainly.com/question/19243813
Answer:
Step-by-step explanation:
Answer: before i can answer i need the image
