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AnnZ [28]
3 years ago
7

Least common denominator of 2/5 and 3/10

Mathematics
1 answer:
irga5000 [103]3 years ago
7 0
Least common denominator is 10
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What is the circumstance of the circle
PilotLPTM [1.2K]

Answer:

8pi

Step-by-step explanation:

circumference of the circle=2 pi r(radius)

=2pi×d(diameter)/2

=2 × pi × 8/2

=8 pi cm

3 0
2 years ago
In ΔBCD, the measure of ∠D=90°, the measure of ∠C=77°, and CD = 41 feet. Find the length of BC to the nearest foot.
OLga [1]

Answer:

182 ft

Step-by-step explanation:

When you are not given a diagram, always draw one for yourself (see diagram).

When you have a right triangle (triangle with 90° angle), you can use the trigonometry ratios, You can remember them using SohCahToa. It is read like this:

<u>s</u>inθ = <u>o</u>pposite/<u>h</u>ypotenuse           Soh

<u>c</u>osθ = <u>a</u>djacent/<u>h</u>ypotenuse          Cah

<u>t</u>anθ = <u>o</u>pposite/<u>a</u>djacent                Toa

"θ" means the angle of reference (the angle you are talking about).

We are looking for the length of BC, which is the <u>hypotenuse</u>. I labelled it "d" (lowercase D) because it is opposite to ∠D.

We know ∠C = 77°. This will be our angle of reference (replace θ).

The side we know is DC, also known as "b" (lowercase B) because it's opposite to ∠B. "b" is the <u>adjacent</u> side when θ = C because "b" is touching ∠C.

Take the general trig. formula that has <u>hypotenuse</u> and <u>adjacent</u>: (cosine ratio)

cosθ = adjacent/hypotenuse

Substitute the variables specific for this problem.

cosC = b/d

Substitute the values you know.

cos77° = (41 ft) / d

Isolate "d" to the left side

dcos77° = d*\frac{41ft}{d}     Multiply both sides by "d"

dcos77° = 41 ft                          

dcos77° / cos77° = 41 ft / cos77°        Divide both sides by cos77°

d = 41 ft / cos77°                      Input into calculator

d = 182.261874....... ft           Unrounded answer

d ≈ 182 ft                       Rounded to nearest foot (whole number)

Remember d = BC. It's often easier to use one letter for calculations.

Therefore the length of BC is about 182 feet.

8 0
3 years ago
PLEASE HELP MEEE 28 POINTS
Blizzard [7]

Answer:

1) (\frac{1}{6}) (^{30n}) +(\frac{1}{6})(^{24}) -(\frac{1}{2})(^{63}) -(\frac{1}{7}) (-7n)

2)5x+4-9+x

3)5x+x+4-9

4)6x-5

Step-by-step explanation:

hope it helps

have a nice day :)

6 0
3 years ago
Read 2 more answers
What is the measure of Zx?
alexgriva [62]

Answer:

66

Step-by-step explanation:

180 - 105 = 75

75 + 39 = 114

180 - 114 = 66

8 0
3 years ago
Can some help me please<br>​
Darina [25.2K]

Answer:

i cant see the first few

Step-by-step explanation:

4 0
2 years ago
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