Answer:
i think 8/25
Step-by-step explanation:
9x + 8y = 3
8y = -9x + 3
y = -9/8x + 3/8...slope here is -9/8. A perpendicular line will have a negative reciprocal slope. All that means is " flip " the slope and change the sign. So the perpendicular slope is 8/9 (see how I flipped the slope and changed the sign)
y = mx + b
slope(m) = 8/9
(8,-7)....x = 8 and y = -7
now we sub and find b, the y int
-7 = 8/9(8) + b
-7 = 64/9 + b
-7 - 64/9 = b
-63/9 - 64/9 = b
-127/9 = b
so ur equation is : y = 8/9x - 127/9
1) Just simplify the equation first:
y - 9 = (2/5)(x - 5)
y - 9 = 2x/5 - 2
2) Transfer everything to the left with opposite sign:
-2x/5 + y - 9 + 2 = 0
-2x/5 + y - 7 = 0
3) Get rid of rational numbers by multiplying:
-2x/5 + y - 7 = 0 |*5
-2x + 5y - 35 = 0
That's the answer. Good luck!
Umm there isn't a question but it would be a direct conversion back to 4,100 US dollars if you're asking how much he'd get back
Answer: No, as the total cost of the 3 shirts w/ sales tax is $45.36 and she only has $45.
Step-by-step explanation:
Start by finding the price of one shirt on sale.
This equals 3.6 which is how much will be deducted from the original price.
One shirt costs when its 20% off.
This is equal to $14.40.
Since she wants to buy 3 of them we just multiply the $14.40 by 3.
This equals $43.2 but this is without a 5% sales tax which is normally added to the total end price.
To add a sales tax you take the sales tax percent plus 1 and multiply it to the $43.2.
This means the total price of Kayla's purchase will be $45.36.
This is over her $45 she has so she can not buy it.