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anastassius [24]
3 years ago
5

I need help please just explain

Mathematics
1 answer:
Anna11 [10]3 years ago
4 0
You would have to divide each number
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Find the sum of the sequence.<br> 39 +40 +41 +42 + ... + 138
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Answer:

Sol1 you can use "first(first+last)/2" is 138(138+1)/2 - 38(38+1)/2 = 8850

Sol2 or you can look this 39+40+41+....+100+(100+1)+(100+2)+....+(100+38) = 1+2+3+.....+99+100+100(38) = 5050+3800 =8850

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What are three equivalent ratios to 2/20??
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so 3 equivalent ratios can be 1/10 (or 1:10), 3/30 (or 3:30), 4/40 (or 4:40)
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2 years ago
Q=p(r+s) solve for p
Reil [10]
Q = p(r + s)
Use the distributive property
Q = pr + ps
Q = p x r + p x s
Q = p x p + r x s
Q = p^2 + rs
Subtract rs from both sides
Q - rs = p^2
Square root both sides
sqrt Q - rs = p
3 0
3 years ago
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