The rule says that the sum of any two sides has to be smaller than the third side so, no it can't
1. Eyeballing the data, the best fit will be pretty close to a line between the leftmost point and the rightmost point.
We estimate those points as (4,220) and (28,470)
The point point form for a line joining (a,b) and (c,d) is
(c-a)(y-b) = (d-b)(x-a)
(28 - 4)(y - 220) = (470 - 220)(x - 4)
24(y - 220) = 250(x-4)
24y - 5280 = 250x - 1000
24y = 250 x + 4280
y = (250/24) x+ (4280/24)
Approximately that's,
y = 10.4 x + 178
Answer: 4th choice, 10.4x + 180
2. For 48 wheelbarrows,
y = 10.4(48)+180 = 679.2
Answer: 679.2 liters of sand
6a-4 = 3a+54
3a = 58
a = 58/3
a= 19.333
Answer:
276 miles, $ 20.148
Step-by-step explanation:
Given:
Donald Duck's car travels in 1 gallon gas = 30 miles
Cost of 1 gallon = $ 2.19
Question asked:
Distance travel in 9.2 gallons = ?
Cost of 9.2 gallons of gas = ?
Solution:
By applying unitary method:
His car travels in 1 gallon = 30 miles
His car will travel in 9.2 gallons = 
= 276 miles
Cost of 1 gallon = $ 2.19
Cost of 9.2 gallons = 
= $ 20.148
The best way to do this is to set up a proportion
30 20
---- = -----
0.5 x
then cross multiply and divide
20 × 0.5 = 10/30=1/3
he needs 1/3 tank of gas to drive 20 miles
I hope I've helped!
