Answer:
z=2
Step-by-step explanation:
I used cross multiplication to solve this.
2/9z=1/9
1(9z)=2(9)
9z=18
z=2
To find the percentage of 575, we would have to multiply 575 by .15
575 x .15 = 86.25
Teresa would have to pay the store owner $86.25 to have the space to style her hair.
Answer:
Step-by-step explanation:
f(-7)= -3(-7)^2 - 20
f(-7) = -3(49) - 20
= -147 - 20 = -167
whichever number you pick (5-50) is represented by 'X'
'X' will be the amount of money you saved a week
The weeks are going to be represented by 'Y'
so the formula would be-
'X' x 'Y'= The amount of money saved over 4 years of high school
So you have to get the number of weeks in four years and multiply it by the number that you selected and that should give you the answer.
<u>Hope this Helps </u> :)
Answer:
y =C₁eˣ + C₂e⁻ˣ + C₃ cos x + C₄ sin x
Step-by-step explanation:
given,
y⁽⁴⁾ - y = 0
( D⁴ - 1 ) y = 0..............(1)
writing characteristics equation
m⁴ -1 = 0
(m² - 1)(m² +1) = 0
(m - 1)(m+1)(m²+1) = 0
hence, roots of the equation comes out to be
= 1, -1, ± i
so the general solution will be
y =C₁eˣ + C₂e⁻ˣ + C₃ cos x + C₄ sin x
