Answer:
y = -3x
Step-by-step explanation:
(a) Slope
y = mx + b
Choose points (-3, 9) and (3, -9)
m = (-9 - 9)/(3 – (-3))
m = -18/(3 + 3)
m = -18/6
m = -3
=====
(b) y-intercept
y = mx +b
Choose point (0,0).
0 = 0 + b
b = 0
=====
(c) Equation of line
y = mx + b
y = -3x
Answer:
Two numbers are 38 and 10
Step-by-step explanation:
Let x and y are the two numbers
One number is 18 more than twice the other number.
The sum of the numbers is 48.
Plug in y =2x+18
Subtract 18 from both sides
divide both sides by 3
x=10
Two numbers are 38 and 10
4x^2-9y^2
= (2x)^2 - (3y)^2
<span>=[(2x + 3y)(2x - 3y)]</span>
we are given
where
price p( in dollars) of a new smartphone
t is the number of months since January
now, we can solve for t
step-1:
Add both sides by 4t^2
step-2:
Subtract both sides by p
step-3:
divide both sides by 4
step-4:
Take sqrt both sides
so, we get
..............Answer