first lets normalize the equation into y=... form. We can do this by dividing all by 4:
y=(5/4)x - 2
5/4 is the gradient of this line. The perpendicular line will have the negative reciprocal gradient, ie., -4/5, so we're looking for a value of -4/5 in front of the x.
That's only answer B. But it has to go through (-5,4). If you fill in -5, you get -5*-4/5 = +4. So y=(-4/5)x is indeed the correct answer.
Answer:
150
Step-by-step explanation:
Answer:
Step-by-step explanation:
The store gave her back the difference (20%-15%= 5%)
5%= the $17 returned
100/5= 20
20*17= $340 which was the original price of the TV before discounts
Answer:
a) y = 4x^2
Step-by-step explanation:
Because in a) y = 4x^2 the degree of equation is 2.
