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Stells [14]
4 years ago
12

Does anyone know what I am missing to get the final mark? Any ideas would be much appreciated :)

Mathematics
1 answer:
Law Incorporation [45]4 years ago
5 0

Answer: Isosceles

<u>Step-by-step explanation:</u>

Given: AB || DE ,  BC is a transversal

∠ABC ≅ ∠BCE by Alternate Interior Angles Theorem --> ∠BCE = 80°

∠DCA, ∠ACB, & ∠BCA are supplementary  --> ∠ACB = 50°

By the Triangle Sum Theorem, ∠A+∠B+∠C  = 180° --> ∠CAB = 50°

Triangle is isosceles because ∠A ≅ ∠C

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What is the surface area of the cylinder with a height of 3 m and radius of 4 m? Round your answer to the nearest thousandth.
IgorLugansk [536]

Answer:

The surface area of the cylinder is of 131.947 square meters.

Step-by-step explanation:

Surface area of a cylinder:

The surface area of a cylinder of height h and radius r is given by the following equation:

S_a = 2\pi r(h+r)

What is the surface area of the cylinder with a height of 3 m and radius of 4 m?

h = 3, r = 4.

So

S_a = 2\pi r(h+r) = 2\pi(3)(3+4) = 42\pi = 131.947

Height and radius are in meters, so the surface area will be in square meters.

The surface area of the cylinder is of 131.947 square meters.

6 0
3 years ago
.
iren2701 [21]

Answer:

x-5 = 0 has a remainder of 3

x = 5

therefore p(5) = 3

x+8 = 0 has a remainder of 0

x = -8

therefore p(-8) = 0

3 0
3 years ago
2x+6+3x=y is what y intercept
Ray Of Light [21]

The formula is y=mx+b, m being the slope and b being the y intercept.

So if you simplify your equation, it's 5x+6=y

Slope is 5, y intercept is 6

8 0
4 years ago
Read 2 more answers
What is the next number in the sequence 1, -1, 2, -2, 3
mylen [45]

Answer:

-3

Step-by-step explanation:

There are two ways to see what the next sequence number would be in this case.

First approach, you start with the first number (1) than count every other number, which are all positive integers.  You do the same starting from the second number (-1), which would then be all negative integers.

Second approach, consider 2 consecutive numbers being a single element of the series... each has a number (1,2,3) with its positive and negative values.

3 0
4 years ago
How do I solve this using cosine or sine ratio?
skad [1K]
You would use the simple format SOH-CAH-TOA
SOH: sine = opposite/hypotenuse
CAH: cosine = adjacent/hypotenuse
TOA: tangent = opposite/adjacent
----
So for this problem to find c you would use this equation: 
sin42= c/7
7sin42=c
c=4.68

Then for d you would use this equation:
tan48=d/4.68
4.68tan48=d
=5.197

Hope this helps :)
6 0
4 years ago
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