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4 years ago

What's length a and length b?

Mathematics

2 answers:

NemiM [27]4 years ago

6 0

The answer is 30 hope it helps

Phoenix [80]4 years ago

5 0

Hello :
sin(60) =b/12.......b= 12sin(60) =12×(√3/2)= 6<span>√3
cos(60) =a/12 ........a=12cos(60) =12×(1/2) =6</span>

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Simplify 10 divided by 7 divided by 8 and put it in a fraction please :)

NeX [460]

Answer:5/28

Step-by-step explanation:

3 0

3 years ago

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there is a direct path from gayle's house to the store. due to construction, the direct route is closed and gayle must travel 6

NikAS [45]

Answer:

c2=10

Step-by-step explanation:

8^2+6^2=c2

64+36=120

c2=square root of 120..which is 10

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3 years ago

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Find vertex of f(x)=(x+3)(x-5)

astra-53 [7]

The x coordinate of the vertex will be the average of the two zeros, here -3 and 5, so x=(-3+5)/2 = 1, f(1)=(1+3)(1-5) = -16.

Answer: (1, -16)

Let's do it some other ways. How about completing the square to turn f in to vertex form?

f(x) = (x+3)(x-5) = x² - 2x - 15 = (x² - 2x + 1) - 1 - 15 = (x-1)² - 16

and now we can read off (1, -16) as the vertex.

The other method is the vertex is x= - b/2a = - (-2)/2(1) = 1.

Three methods, same answer. Good.

4 0

3 years ago

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Mrs. Solar is remodeling a house and is looking for a contractor to do the work. She is getting quotes from 3 different contract

andrezito [222]

#b. The equation y = 50x + 200 represents the total cost that the contractor will charge for x hours of work.
#c. (1, 250); (2, 300); (3, 350)

6 0

3 years ago

Freddie is at chess practice waiting on his opponent's next move. He notices that the 4-inch-long minute hand is rotating around

Alex777 [14]

One complete revolution of the minute hand sweeps a central angle of 360° which is equivalent to 60 minutes.
That is, the minute hand creates
(360°/(60 min) = 6 degrees/min.

From 3:35 to 3:55 is 20 minutes.
It sweeps a central angle of
(20 min)*(6 deg/min) = 120°

Because 360° = 2π radians,
120° = (120/360)*2π = (2π)/3 radians

Answer:
$\frac{2 \pi }{3} \,radians$
In decimals, this is 2.1 radians (nearest tenth)

Part 2:
Because the minute hand is 4 inches long, the length of the arc swept is
(4 in)*(2π/3 radians) = 8π/3 inches

Answer:
$\frac{8 \pi }{3} \,inches$
In decimals, this is 8.4 inches (nearest tenth).

7 0

3 years ago