Answer:
210
Step-by-step explanation:
Formula I made up: (Don't copy it please) (x-1 + x-2 + x-3... until x-(x-1)
Add all answers possible. (4 true and falses with 2 different answers each.) (3 multiple choice with 4 possible outcomes.)
4 x 2 = 8 | 3 x 4 = 12 |
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8 + 12 = 20
Do what I like to call Additional factorial. (it's a little different, so follow the formula above.)
x = 20
20 -1 + 20 - 2... 20-(20-1) = 210
19 + 18... + 1 = 210
Compare my answer to others if you get any because I am just in 8th grade and I am a nerd at math and I love it. Because I am in 8th grade, I have a slight possibility for being wrong. Enjoy the answer and thanks for letting me use my skills for the world. :)
3 is not the GCF, 30 is the GCF. The answer is 30(2+3).
For this, since 4y - 7 and 2y - 1 are congruent, we can solve for y by setting them equal to each other.

Firstly, subtract 2y on both sides of the equation. 
Next, add 7 on both sides of the equation. 
Finally, divide 2 on both sides of the equation, and your answer will be y = 3
Answer:
1st, 3rd, 4th
Step-by-step explanation:
1st one: 43 x
multiply x by 43
7 x 43 = 301
7 x 43 = 258
10 x 43 = 430
3 x 43 = 129
4 x 43 = 172
(correct)
2nd one: 12x
multiply x by 12
2 x 12= 32
we know that 2 x 12 is 2 so this equation does not work
(incorrect)
3rd one: 202x
multiply x by 202
6 x 202 = 1212
4 x 202 = 808
10 x 202 = 2020
3 x 202 = 606
8 x 202 = 1616
(correct)
4th one: 13x
multiply x by 3
9 x 13 = 117
2 x 13 = 26
7 x 13 = 91
3 x 13 = 36
10 x 13 = 130
(correct)
Answer:
3221
Step-by-step explanation:
By using lcm method
2 12600
2 6300
2 3150
3 1575
3 525
5 175
5 35
7 7
1

therefore the number is 3221