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Elina [12.6K]
3 years ago
14

A boy is building a pyramid out of building blocks. He puts 20 blocks in the first row, then he puts 19 blocks in the row above,

and so on. Find the total number of blocks he needs.
Mathematics
1 answer:
rjkz [21]3 years ago
8 0

Answer:

<h3>The answer is 206 I believe</h3>

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NEED HELP FAST!!!! will mark u as brainliest
Shalnov [3]
Obviously, it's not rational, because it's the sum of two square roots, so cancel out A and B right away.

If we solve it
 
sqrt (18) + sqrt (2)
= sqrt (9*2) + sqrt (2)
= 3 sqrt (2) + sqrt (2)
= 4 sqrt (2)

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6 0
3 years ago
Are the following figures similar?
Tcecarenko [31]
No the corresponding angles are not congruent, because the angle measures on the smaller figure are 90, 90, 137, and 43, while the larger figure has angle measures of 90, 90, 136, 44. that is why the following figures are not congruent.
3 0
3 years ago
Parallelogram ABCD is rotated to create image A'B'C'D'. On a coordinate plane, 2 parallelograms are shown. The first parallelogr
Gala2k [10]

Answer:

(x,y)→(y,-x)

Step-by-step explanation:

Parallelogram ABCD:

A(2,5)

B(5,4)

C(5,2)

D(2,3)

Parallelogram A'B'C'D':

A'(5,-4)

B'(4,-5)

C'(2,-5)

D'(3,-2)

Rule:

A(2,5)→A'(5,-2)

B(5,4)→B'(4,-5)

C(5,2)→C'(2,-5)

D(2,3)→D'(3,-2)

so the rule is

(x,y)→(y,-x)

4 0
2 years ago
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What are the solutions of 2x^4-5x^3+60x^2+180x-432
swat32
The polynomial can't be factored because they are all rational numbers.
5 0
3 years ago
Find the result when 5 + 2 is subtracted from 9.
Kamila [148]

Answer:

it is 2

Step-by-step explanation:

3 0
2 years ago
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