Answer:
Step-by-step explanation:
3a-2b=14 multiply by 3
9a - 6b = 42 (1)
4a+3b=13 multiply by 2
8a +6b = 26 (2)
sum up (1) and (2)
17a = 68
a =4
b=-1
Answer:
-65/64
Step-by-step explanation:
1 5/8/(-1 3/5)
1 5/8=13/8
-1 3/5=-8/5
(13/8)/(-8/5)
(13/8)(-5/8)
-65/64
Answer:
21
Step-by-step explanation:
In the given number 9261, the second group of 3 digits from the right is 009. This number lies between two perfect cube numbers 8 and 27 i.e. 23 and 33. Because 9 is more close to 8 i.e. 23, the ten's digit of the cube root of 9261 is 2. The cube root of 9261 found using the estimation method is 21.
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.