Math Homework

[Jessica]

Hey, are these correct answers? Calling all math experts/teachers!

1. The perimeter of a rectangle is 36. The ratio of the lengths of the sides is 2 : 7. What are the lengths of the sides?

a. 4 & 14
b. 6 & 16
c. 2 & 12
d. 8 & 28
e. 13 & 19


2. Which of the following pairs of numbers has a geometric mean of 44?

a. 3 & 72
b. 40 & 48
c. 16 & 121
d. 2 & 484
e. 96 & 17


3. The distance between 2 cities on a map is 7 cm. The map has a scale of 1 cm : 20 km. Find the actual distance.

a. 2.85 km
b. .35 cm
c. .35 km
d. 140 km
e. 140 cm


4. A triangle has two sides that have lengths of 17 ft and 22 ft. Which of the following lengths could not represent the length of the third side?

a. 21
b. 32
c. 18
d. 35
e. 40


5. Which of the following statements are true about the point of concurrency of the perpendicular bisectors of a triangle?

I. For a right triangle, the point of concurrency lies onthe triangle.
II. For an obtuse triangle, the point of concurrency lies inside the triangle.
III. For an acute triangle, the point of concurrency lies outside the triangle.

a. I only
b. II only
c. III only
d. I and III
e. none of these

Thanks in advance!!! There is a big assessment on Tuesday, worth 28 points. I really hope to do good on it.

[laepelba]

Jessica - you are welcome to PM me about your math homework. I'm rusty on my geometry, but each of these problems looks correct. You might want to google about the perpendicular bisectors to be sure, but I'm rather positive that #5 is also correct. The rest I'm sure about. Let me know how your assessment tomorrow goes!

[Jessica]

I know already about perpendicular bisectors. thanks.