1.
2x+7=2x-7
2x-2x=-7-7
0=-14
Math error.
2.
3x+8=-2x+8
3x+2x=8-8
5x=0
x=0
3.
4(x+1)=4x+4
4x+4=4x+4
4x-4x=4-4
0=0
Correct
Answer:
Part 1)
Part 2)
Step-by-step explanation:
<u><em>Analize two problems</em></u>
Part 1) If y varies directly with x, and If y=-8 and x= -3 what’s x when y= 6
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
step 1
Find the value of the constant of proportionality k
For x=-3, y=-8
substitute the given values
step 2
Find the linear equation
step 3
Find the value of x when y=6
substitute the value of y in the linear equation
solve for x
simplify
Part 2) If y varies inversely with x, and If y=-8 and x= -3 what’s x when y= 6
we know that
A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form or
step 1
Find the value of the constant of proportionality k
For x=-3, y=-8
substitute the given values
step 2
Find the equation
step 3
Find the value of x when y=6
substitute the value of y in the equation
solve for x
Answer: 207 over 16 or in decimal form 12.9375
Step by step explanation:
Add 15 and 3 to get 18
9+ 7x18 over 32
Multiply the 7 and 18 to get 126
9+ 126 over 32
Reduce the fraction 126 over 32 to get the lowest terms by extracting and cancelling out the 2
9+ 63 over16
Convert 9 into the fraction 144 over 16
144over16 +63over16
Both of the fractions have the same denominator, therefore you should add them by using their numerators.
144+16over16
Add 144 and 63 to get the final number.
207over16
HOPE THIS HELPED YOU OUT, MATE! IF NOT THEN I'M SORRY!
1) It's probably best to use a credit card instead of using cash for most things. It's safest.
2) I can exchange dollars for British Pounds here in the US, at the airport (In Manchester) or at a British bank? It doesn't really matter when I exchange it since there will be a fee? Is there one better way than another?