Answer:
B
Step-by-step explanation:
To solve just compute
πr²h
π49*4=615
2 * x/100 = 8
x/100 = 4
x = 400
400%
Answer:
a² - 14a - 15 = 0 (quadratic equation)
Emily's age = 15 years
Tuli's age = 15 - 10 = 5 years
Step-by-step explanation:
let
Emily age = a
Tuli age = a - 10
Two years ago their ages will be as follows.
Emily's age = a - 2
Tuli's age = a - 10 - 2 = a - 12
The product of their ages 2 years ago is 39.
(a - 2)(a - 12) = 39
a² - 12a - 2a + 24 - 39 = 0
a² - 14a - 15 = 0 (quadratic equation)
To get a
a² + a - 15a - 15 = 0
a(a + 1) - 15(a + 1)
(a + 1)(a - 15)
a = -1 or 15
we can only use 15 as it is positive.
okay so you multiply .15 by 120 which is 18. then you multiply .10 by 120 which is 12. so you do 120 subtracted by 12 and 18 which the answer is 90
Given
Shamariah collects silk roses.
She had 17 silk roses in a vase.
Six friends each gave her 3 more roses
Find out the roses does Shamariah have now.
To proof
As given in the question
She had 17 silk roses in a vase
Six friends each gave her 3 more roses
let the total number of roses shamariah have = x
The equation becomes
x = 17 + 6 × 3
x = 17 + 18
x = 35
Number of roses shamarah have now is 35.
Hence proved
