Because x,y,z form a geometric sequence, therefore the common ratio is
r = y/x = z/y
That is,
y² = xz (1)
We are given:
x + y + z = 18
Therefore
x + z = 18 - y (2)
Also,
x² + y² + z² = 612
Therefore, from (1), obtain
x² + z² + xz = 612
(x + z)² - xz = 612
From (1) and (2), obtain
(18 - y)² - y² = 612
324 - 36y + y² - y² = 612
-36y = 288
y = -8
Answer: y = -8
Answer:
all the points below this line towards (0, 0) on the whole plain will work
Step-by-step explanation:
This line passes through (0, 2) and (-4, 0) which puts it in the fourth quadrant
y < 0.5x + 2 i.e. 0 < 2 which is true
all the points below this line towards (0, 0) on the whole plain will work
Answer:
x = -25/13
Step-by-step explanation:
Subtract 41 from 16 and divide the difference by 13
Answer: (x, y) —> (-x, y)
Step-by-step explanation:
This is because the translation rule for reflection across the y-axis is (x, y) —> (-x, y)
The answer is a, when multiplying numbers with the same base you add their exponents
