3 years ago

Anybody know the answer to 4 and 5 I really could use some help

Mathematics

1 answer:

Elena-2011 [213]3 years ago

4 0

The first one you are looking for perimeter. So, 2+2+2+2 = 8

The second one is area = b x h so you get 600

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A is set of positive multiples of 5 less than 23

Juli2301 [7.4K]

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Answer:

{5, 10, 15, 20}

Step-by-step explanation:

Multiples of 5 are of the form 5n, where n is an integer. The ones of interest will satisfy ...

0 < 5n < 23

0 < n < 4.6

That is, the multiples of 5 we want are for values of n that are 1 through 4. The set is ...

5 × {1, 2, 3, 4} = {5, 10, 15, 20}

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Part 2 of me forgetting everything

Lunna [17]

Answer:

x = 15

Step-by-step explanation:

There are 2 triangles. The small triangle CDE has sides that are 8 and 20.

The big triangle CAB has sides 6+8 and 20 + x. Add the 6 and 8 which is 14. Create a proportion and cross multiply, divide, then solve for x.

$\frac{8}{20}=\frac{14}{20+x\\}\\\\8(20 + x) = 20(14)\\160 + 8x = 280\\160-160+8x=280-160\\8x= 120\\8x/8=120/8\\x=15$

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ser-zykov [4K]

Answer:

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