If the sol'ns are -9 and 9, then we can use this to form our eq'n:
(x - 9)(x + 9) = 0
x^2 - 81 = 0
so...
x^2 + z - 103 = x^2 -81
z - 103 = -81
z = -81 + 103
z = 22
Answer:
It will take 6 hours to complete the biking path.
Answer:
819
Step-by-step explanation:
We solve the above question using simple interest
The formula for the total amount in a bank amount when it earn simple interest annually is:
A = P(1 + rt)
When
P = Initial amount in the account = 780
r = Simple Interest rate = 2.5% = 0.025
t = 2 years
A = 780(1 + 0.025 × 2)
A = 780(1 + 0.050)
A = 780(1 .050)
A = 819.00
The amount of money that will be in her account if she does not make any deposits or withdrawals in 2 years is 819.
Answer:
90.5
Step-by-step explanation:
Velocity is a time-derivative of displacement or the height, in this case.
At maximum height, the velocity is 0 and the height is 128.
Substitute these values into both equations above,
From the first equation,
Substitute for .
Answer:
Option 2:
The variable a should be multiplied by Two-thirds only and then added to 10.
Step-by-step explanation:
Let the age be a
The sum of 10 and two-thirds of that tree’s age:
10 + ⅔a
is equal to 50:
10 + ⅔a = 50
⅔a = 40
a = 60