Step-by-step explanation:
I think it's TRUE but the equation is false.
$80 but give the other person Brainliest :D
Answer:
I only know the first 1 sorry but here is the answer y=-3/4+2
Step-by-step explanation:
3x+4y=8
-3x -3x subtract -3x to get on the right side
4y=-3x+8
/4 /4 /4 divide by 4 on both sides
y=-3/4x+2 since 4 can't go into 3 you leave as a fraction -3/4x
UPDATE: I found the answer to number 4
The answer is y=-11/7x+8
-11x-7y=-56
+11x +11x Add 11x
-7y=11x-56
/-7 /-7 /-7 Divide by -7 on both sides
y=-11/7x+8 Since -7 can't go into 11 you leave as a fraction -11/7x
ANOTHER UPDATE: I found the answer to number 7
-14x+y=7
+14x +14x Add 14x to both sides
y=14x+7 Since y doesn't have a number your answer is as shown
<span>1) Name the variables
Number of days: x
rent: y
2) state the initial points
x y
days $
3 285
60 510
3) assume linear relation:
=> (y - yo) / (x - xo) = (y1 - yo) / (x1 - xo)
=> (y - 285) / (x - 3) = (510 - 285) / (60 - 3)
=> (y - 285) / (x - 3) = 225 / 57 = 75 / 19
=> 19 (y - 285) = 75 (x - 3)
=> 19y - 19*285 = 75x - 75*3
=> 19y - 75x = 5415 - 225
=> 19y - 75x = 5190
=> standar form = -75x + 19y = 5190
PART B: Write the equation obtained in Part A using function notation.
-75x + 19y = 5190
=> 19y = 5190 + 75x
=> y = 5190/19 + (75/19)x
=> function notation = f(x) = (75/19)x + 5190 / 19
PART C: Describe the steps to graph the equation obtained above on the
coordinate axes. Mention the labels on the axes and the intervals.
1) Coordinate axes:
x: number of days
y: rent
2) draw the two given points: (3,285) and (60, 510)
3) draw the line that joins those points from the interception of the y-axis until some points further (60, 510).
</span>
Let the number of quarter be x and that of nickels be y
total number of coins will be:
x+y=85
thus
x=85-y.........i
total amount of money will be:
0.25x+0.05y=14.25....ii
substituting i in ii we get:
0.25(85-y)+0.05y=14.25
21.25-0.25y+0.05y=14.25
7=0.2y
y=7/0.02
y=35
thus
x=85-35=50
the number of quarters was 50 and that of nickels was 35
