8. What is the radius of a circle when the

Mathematics

2 answers:

Bezzdna [24]3 years ago

7 0

Answer:

radius = circumference ÷ 2× po

Step-by-step explanation:

the radius is 2.55 but it's not in ur options

Naddika [18.5K]3 years ago

3 0

Answer:

C. 8 cm

Step-by-step explanation:

Given that C = 2πr and π ≈ 3.14159,

C = 2πr

16 = 2πr (substitute)

16/2π = 2πr/2π (remove 2π by dividing both sides with the said term)

8/π = r

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beks73 [17]

The area of a triangle is 180

4 0

3 years ago

The distances between three cities on a map are 45 miles, 56 miles, and 72 miles. Do the positions of

ollegr [7]

Answer:

The position of the three cities do not form a right-triangle.

Step-by-step explanation:

There are three cities on a map (say A, B, and C).

Now, the distances between them are 45 miles, 56 miles, and 72 miles.

i.e. AB= 45 miles, BC= 56 miles and CA =72 miles.

If the three cities A, B, C form a right-angled triangle on the map, then applying Pythagoras Theorem AB² +BC² =AC²

or, AC= √(AB² +BC²) must be satisfied.

Now, right-hand side of the above equation =√(45²+56²) =71.84 ≠ 72 (AC)

Hence, Right-hand side ≠ Left-hand side.

Therefore, the positions of the three cities do not form a right triangle. (Answer)

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4 years ago

What are the factors of 5x2 + 39x − 8?

prisoha [69]

Answer:

C. (5x - 1)(x + 8)

Step-by-step explanation:

In a factoring problem by hand, the common steps to solve would be the "AM" method, or (Add-Multiply). Simply stated, finding what adds to the x-coeficient and what multiplies to the constant. In this case, what adds to 39(x) and what multiplies to 8. Just reading that, we can see that there aren't any numbers that can do that, so we have to improvise. Set up the problem equal to something that it can factor into: