X+y=17
Y=x+7
X+x+7=17
2x+7=17
-7. -7
2x. =10
—- —
2. 2
X. = 5
Check:
Y=5+7
Y=12
Answer
X=5
Y=12
Answer:
2, 6, 18, 54, 162
Step-by-step explanation:
In a geometric sequence, terms that are 2 terms apart (2nd & 4th, for example) have a ratio that is the 2nd power of the common ratio. Since 54/6 = 9 = 3², the common ratio is 3.
The first term will be the 2nd term divided by that ratio; the 5th term will be the 4th term multiplied by that ratio. You can figure the 3rd term any of several ways (and they should all give the same value): multiply the 2nd term, divide the 3rd term, or find the geometric mean of the 2nd & 4th terms: √(6·54) = 18.
I tired I don’t know if it’s correct
We have
2x³+3x²+2x-4-(x³-2x²-x-1). Using the distributive property, we get
2x³+3x²+2x-4-x³+2x²+x+1
Adding and subtracting like terms (e.g. x³+3x³=4x³), we get
x³+5x²+3x+3
