**Answer:**

x = 36

**Step-by-step explanation:**

The altitude to the hypotenuse is the mean proportional between the segemts of the hypotenuse.

So,

64x = 48(48) = 2304

x = 2304/64

x = 36

**Answer:**

i dont really know :/

b

**Step-by-step explanation:**

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**Answer:**

the teacher should be sad. the correct answer is 68 inches is NOT greater than 70 inches, therefore a triangle can't be created

**Step-by-step explanation:**

in a triangle, 2 sides added together have to be greater than the third side or else the triangle can't be created. therefore, since 31+37=68 inches, and 68<70, the triangle can't be created.

**Answer:**

C - 10

**Step-by-step explanation:**

n is the number of the term

an = -2n+8

a9 = -2*9 +8

a9 = -18+8

a9 = -10

The 9th term is -10

**Answer:**

The ride will take **2 h**

**Step-by-step explanation:**

From the question,

Deon plans to ride a 20-mi bicycle trail, that is the total distance he plans to cover is 20-mi

Distance, d = 20 mi

Also, his average speed is 10 mi/h

rate of speed, r = 10 mi/h

To determine how many hours the ride will take,

From the formula,

d = rt

where

d is the distance covered

r is the average rate of speed

and t is the time.

We can solve for t, such

d = rt becomes

t = d/r

Now, from the question

d = 20 mi

r = 10 mi/h

∴ t = (20 mi) / (10 mi/h)

t = 2 h

Hence, the ride will take **2 h** (hours)