The slope = 4
y-intercept = -3
The equation of a line in slope intercept form is written as y=mx+b
where m is the slope and b is the y-intercept.
replace m and b with the given information:
The equation is: y = 4x-3
The answer is X=1+I sqrt 19
Since there is no x it’s simply moving down 4. There is no movement left or right (x) just simply down for -4.
The area of the circle is A = π*r²
Given r = 3.2 and π is approximately 3.14, thus
A = 3.14*(3.2)²
A = 32.1536 or 32.15 (rounded off to hundredths place)
When 'y' is directly proportional to 'x', we express this by
y = kx
where 'k' is the constant, which we need to work out first
Cost of circular mirrors = (k) (diameter)²
50 = k(60)²
50 ÷ 3600 = k
the proportional formula is
y = (1/72)x²
The cost of the mirror when diameter = 90cm
y = (1/72) (90)²
y = 112.5
Answer: $112.50
