Answer:
19. 3x+5/2x+7 =5
or, 3x+5=5×(2x + 7)
or, 3x + 5 = 10x + 35
or, 5 - 35 = 10x - 3x
or, -30 = 7x
or, -30/7 = x
21. let x be the other number
we know,
or, x × 1/7 =2
or, x/7 =2
or, x = 14
therefore, the other number is 14.
62.4% x = 17.16 and the answer is 27.5.
Y=-5x+b
using (5,22) y= -5x+22
using (-5,-29) y= -5x-29
Answer:
r = 0.5 and 5.25
Step-by-step explanation:
The common ratio r of a geometric progression is the ratio of a term to the one before it, that is
(a)
r = 42 ÷ 84 = 0.5
(b)
To obtain a term in the sequence multiply the previous term by r, thus
a₅ = 10.5 × 0.5 = 5.25
