Answer:
10 miles per hour
Step-by-step explanation:
Average velocity=distance covered/time in hours
Distance=2 miles
time=12minute
change minutes to hour=12/60 =0.2hrs
v=2÷0.2
v=10miles per hour
Answer:
1. 4/5
2. 1/3
Step-by-step explanation:
Answer:
y= −
5
x
^2
−
40
x
−
78
Step-by-step explanation:
Write in standard form.
To solve the value of x in the above equation, here are the steps.
1. Subtract 13 on both sides of the equation.
2. Divide both sides of the equation by 4.
3. Get the square root on both sides of the equation.
The possible values of x are +3 and -3. The smaller value is -3.
To determine the ratio, we need to know the formula of the area of an hexagon in terms of the length of its sides. We cannot directly conclude that the ratio would be 3, the same as that of the ratio of the lengths of the side, since it may be that the relationship of the area and length is not equal. The area of a hexagon is calculated by the expression:
A = (3√3/2) a^2
So, we let a1 be the length of the original hexagon and a2 be the length of the new hexagon.
A2/A1 = (3√3/2) a2^2 / (3√3/2) a1^2
A2/A1 = (a2 / a1)^2 = 3^2 = 9
Therefore, the ratio of the areas of the new and old hexagon would be 9.