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Harlamova29_29 [7]
2 years ago
11

The sum of two numbers is 51.

Mathematics
1 answer:
Firdavs [7]2 years ago
4 0

Answer:

21 and 30

Step-by-step explanation:

x + y = 51

x - y = 9

add the two equations and y's will cancel out

2x = 42  divide by 2

x = 21   so put 21 in for x in the top equation and solve

21 + y = 51

y = 30

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A monument in the shape of a square pyramid was built in a park.
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First step

Using Pythagorean theorem to find the surface area

Since POR is a right triangle

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Second step

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