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3 years ago

WILL GIVE BRAINLIEST! DO NOT COPY ANSWERS OFF INTERNET

Mathematics

2 answers:

Alla [95]3 years ago

5 0

Answer:

ITS EITHER B OR C but im 75 percent sure its b

Step-by-step explanation:

Anarel [89]3 years ago

3 0

Answer:

Option A

Step-by-step explanation:

angles ABD and DBC are complementary given

angle ABD=50 degrees given

angles ABD and DBC = 90 degrees def. of complementary

angle DBC = 40 degrees algebra (90-50=40)

angles EBF and ABD are vertical angles vertical angles postulate

angle EBF is congruent to angle ABD def. of vertical angles

angle EBF = 50 degrees def. of congruence

angles EBF and ABF are a linear pair def. of linear pair

angles EBF and ABF are supplementary def. of linear pair

angles EBF and ABF = 180 def. of supplementary

angle ABF = 130 degrees algebra (180-50=130)

angles ABF and EBD are vertical angles vertical angles postulate

angles ABF and EBD are congruent def. of vertical angles

angle EBD = 130 degrees def. of congruence

angles CBE + DBC = EBD diagram

angles CBE + DBC = 130 degrees transitive property of congruence

angle ABD = 90 algebra (130-40=90)

B is needed in the process, but the main statement that actually does the justification is A, so option A

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The diameter of a wheel of a lorry is 150cm. If the lorry travels 376.8m, how many times does the wheel rotate?

tresset_1 [31]

<h3>Answer: 79 full rotations</h3>

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Explanation:

150 cm = 150/100 = 1.5 m

The wheel has a diameter of 1.5 meters

The circumference of the wheel is

C = pi*d

C = pi*1.5

C = 1.5pi

C = 4.71238898038469

I'm using my calculator's stored version of pi to get the most accuracy.

Then we divide the 376.8 over the circumference found

(376.8)/(4.71238898038469) = 79.9594434093682

Despite being very close to 80, we must round down to 79 because we don't have enough to get that full 80th rotation. In other words, we have 79 full rotations and then some change leftover.

Though for the sake of simplicity, I can see how it's useful to say "about 80 rotations" if 79 seems a bit clunky. I'll stick with 79 however. Let me know if your teacher instructs otherwise.

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2 years ago

3) 9i(3)+ 9i(2)+ 18i + 36

GalinKa [24]

Answer:
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explanation:

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3 years ago

Y B X C W _ … what letter comes next?

maks197457 [2]

Answer:

Step-by-step explanation:

Since it goes B and then C it is safe to assume the letters are going in alphabetical order. Therefore, the next letter would be D.

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3 years ago

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Elizabeth is waiting for her flight at the airport. She decides to conduct an experiment. She wants to know how many people at t

Likurg_2 [28]

Answer:

the population is everyone at the airport ,the sample is the 50 people that walked by Elizabeth

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3 years ago

This composite shape is a rectangle with a semicircle attached on one end. The diameter of the semicircle is 6 feet.

Ugo [173]

As we can see on the picture we have a rectangle and half of circle.

The areas for half circle and rectangle are:

$A_{rectangle}=a\cdot b \\A_{halfcircle}=\frac{A_{circle}}{2}=\frac{\pi r^2}{2}$

The area of the figure is the sum of the area of half circle and rectangle. Also the height of a rectangle (6ft) is a diameter of a half circle therefore the radius of half circle is 6ft ÷ 2 = 3ft.

Now we calculate the areas.

$A_{rectangle}=10\cdot 6=\underline{60} \\A_{halfcircle}=\frac{3.14\cdot3^2}{2}=\underline{14.13} \\A_{total}=A_{rectangle}+A_{halfcircle} =60+14.13=\boxed{74.13\approx74}$

The area of the figure is approximately 74ft squared.

Hope this helps.

r3t40

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3 years ago

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