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natali 33 [55]
3 years ago
10

Explain how using basic facts can help you find 10x20x30x40 mentally.

Mathematics
1 answer:
sladkih [1.3K]3 years ago
4 0
You know that anything times a one is that number, so multiply 2,3, and 4, and then multiply that by one. once you get the answer, put the zeros behind each multiplied number behind your answer, and there you go.

2×3×4= 24×1=24
there are 4 zeros
240,000
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7 0
4 years ago
What is least common multiple or 3 and 8?
vladimir1956 [14]
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3 0
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Which expression is equivalent to (x2 +9x – 1)(-4x + 3)? brainly
Andrews [41]

Answer:

- 4x³ - 33x² + 31x - 3

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor, that is

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4 0
4 years ago
PLEASE HELP ME!!! PLEASE TRY TO DO ALL OF THEM THX! :)
kakasveta [241]
Hello there!

Number 1 is C (11, 4) Image is below

I don't know number 2, so so sorry!


Number 3 is A. 36 The formula for perimeter of a rectangle is (2 * base) + (2 * height)
The base = 13
The height = 5

(5 * 2) + (13 * 2)

10 + 26 = 36


Number 4 is 23 units. 


I hope I was of assistance!

~ Fire




5 0
4 years ago
How do i find the congruence of triangles??? i dont know how to do it at all please help​
Elza [17]

Step-by-step explanation:

"If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent. If any two angles and the included side are the same in both triangles, then the triangles are congruent."

6 0
3 years ago
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