Answer:
its A becauss i tryed b and th en i tried A so its a
Yes for when you solve the problem then graph it.
Answer:
288
Step-by-step explanation:
so first think of how many a dozen is, which is 12 so 2 dozen would be 24
24 EACH month
12 months
take 24 eggs EACH month times your 12 years and you get 288 eggs a year
(i) speed = distance / time
so time = distance / speed
here we have
time t = 1080/x hours
(ii) return flight time = 1080 / (x + 30) hours
(a) 1080/x - 1080/(x + 30) = 1/2
Multiplying through by the LCD 2x(x + 30) we get:-
1080*2(x + 30) - 2x*1080 = x(x+30)
2160x + 64800 - 2160x = x^2 + 30x
x^2 + 30x - 64800 = 0
(b) factoring; -64800 = 270 * -240 ans 270-240 = 30 so we have
(x + 270)(x - 240) = 0 so x = 240 ( we ignore the negative -270)
So the speed for outward journey is 240 km/hr
(c) time ffor outward flight = 1080 / 240 = 4 1/2 hours
(d) average speed for whole flight = distance / time
Time for outward journey = 4.5 hours and time for return journey = d / v
= 1080 / (240+30) = 4 hours
Therefore the average speed for whole journey = 2160 / 8.5 = 254.1 km/hr
Answer:
Step-by-step explanation:
Given
The attached graph
Required
Determine the linear equation
First, we need to calculate the slope
From the graph, the following relationships exist:
So, the expression for calculating slope becomes:
Next, we calculate the equation using:
This gives:
Open bracket
Make y the subject:
