spaztrid
27.07.2019 •
Mathematics
How can i find a geometric sequence between (a) 2, -3. 9/2 -18/4 (b) -7, 10, 23, 36 (c) 8, 4, 2, 1, 1/2 1/4 (d) 0 1 2 3
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Ответ:
4*1/2=2
2*1/2=1
1*1/2=1/2
1/2*1/2=1/4
geometric sequence (c)
Ответ:
Step-by-step explanation:
Let Freda's sum = x
Donnie has 3/4 x
He spends 63 dollars. His sum is now
3/4x - 63
Now the equation looks like this
6(3/4x - 63) = x Remove the brackets
6*3/4 x - 378 =x
6 * 3/4 = 4 1/2
4 1/2 x - 378 = x Add 378 to both sides
4 1/2 x = x + 378 Subtract x from both sides
3.5 x = 378 Divide by 3.5
x = 378 /3.5
x = 108
Since x = 108, that's how much Freda had. (She spent nothing).