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Rufina [12.5K]
3 years ago
13

Help please! ill mark you brainliest!

Mathematics
1 answer:
lbvjy [14]3 years ago
8 0

Answer:

80 degrees

Step-by-step explanation:

angle c=50

this is an isoceles triangle in which both base angles are same

so, angle e=50

now we will use angle sum.property which states that the sum of all the interior angles of a triangle is equal to 180

so, 50+50+angle d=180

100 + angle d = 180

angle d =180-100

angle d = 80 degrees

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Help please! And can you show step by step work
Sedaia [141]

Answer:

2.1134 liters

Step-by-step explanation:

There are 4 quarts in a gallon and each quart is 1.0567 liters. 2 quarts are 1/2 a gallon. 1.0567*2=2.1134

4 0
3 years ago
Read 2 more answers
A circle has an area of 64 cm²<br> Work out the radius of the circle.<br> (2marks)
wlad13 [49]

Answer: 4.51 cm

Step-by-step explanation:o Area of circle=pi×r^2

Given area=64 cm sq.

so, 64=3.14×r^2

64/3.14= r^2

20.38= r^2

√20.38=r

4.51=r

Therefore, radius= 4.51 cm

Please rate 5 stars and vote as brainliest:)

(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)

8 0
4 years ago
Radius of the circle is 20cm. there are two chords of lengths.
Vaselesa [24]

9514 1404 393

Answer:

  12 cm

Step-by-step explanation:

The distance to the chord is the median of an isosceles right triangle with hypotenuse 20 and leg 16. This 5:4 ratio suggests the other leg of that right triangle would make the ratios 3 : 4 : 5, so is 12.

The chords are 12 cm from the center.

_____

You can, of course, use the Pythagorean theorem. If c is half the chord length and d is the distance to the chord, you have ...

  c² + d² = r²

  16² + d² = 20²

  d² = 400 -256 = 144

  d = √144 = 12 . . . . . cm

4 0
3 years ago
[{ (-3-7) + 4 x 5} x 5 + 10 ] / -12<br><br>solve this on a paper a send a photo please
Natali5045456 [20]

Answer:

5

Step-by-step explanation:

ITS 5

8 0
3 years ago
A hiker in Africa discovers a skull that contains 63% of its original amount of C-14.
tester [92]

Answer:

3820 years

Step-by-step explanation:

The age of the skull can be found using carbon-14 by applying the half-life relationship.

Age of skull is given by;

t=(\frac{In\frac{N}{N0} }{-0.693} )*5730

where N=63 N₀=100 -0.693=decay factor of carbon and 5730 =half-life of carbon-14, t =age

substitute values in equation

t=(\frac{In\frac{63}{100} }{-0.693} )*5730\\\\\\t=(\frac{In0.63}{-0.693} )*5730\\\\\\t=(\frac{ -0.4620}{-0.693} )*5730\\\\\\t=(0.6667)*5730\\\\\\t=3820.29\\\\\\t=3820years

4 0
4 years ago
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