Answer: 23
Step-by-step explanation:
1 mile = 5280 feet
So,
There are 5280/240 = 22 240 ft. in 1 mile
So, there will be 22 signs in that 1 mile road. Notice that when we divide 5280 by 240 we get an integer. So, we can say that the sign placed at the end of the mile is included in that 22. Now, all we need to do is add one sign that is at the start of the mile. Therefore, the toal signs is 23
Answer: x=2
Step-by-step explanation:
Answer:
Answer 60
Step-by-step explanation:
The distance from an exterior point to the incircle is equal to the tangent length in both cases.
So the 19 is made up of 9 and 10.
The length of the other portion of the tangent from the end of 19 to the tangent point on the right is also 10.
By a similar argument the lower length of the line to the tangent point is 11.
So you have
9 + 9 + 10 + 10 + 11 + 11
18 + 20 + 22 = 60.
Answer: 
Step-by-step explanation:
We know that the standard quadratic equation is ax^2+bx+c=0
Let's compare all the given equation to it and , find discriminant.
1. a=2, b= -7, c=-9
So it has 2 real number solutions.
2. a=1, b=-4, c=4
So it has only 1 real number solution.
3. a=4, b=-3, c=-1
So it has 2 real number solutions.
4. a=1, b=-2, c=-8
So it has 2 real number solutions.
5. a=3, b=5, c=3
Thus it does not has real solutions.
