Answer:
x^2 + 5n = 4mx
=> x^2 - 4mx + 5n = 0
D=0 (since one root then roots are equal)
b^2-4ac = 0
(-4m)^2 - 4(1)(5n) = 0
16m^2 - 20n = 0
16m^2 = 20n
8m^2 = 10n
4m^2 = 5n
hope it helps.......
Answer:
20
Step-by-step explanation:
im pretty sure you divide!
Answer: the store charged $40 for the bike helmet before tax.
Step-by-step explanation:
Let x represent the amount that the store charge for the bike helmet before tax.
If the sales tax rate was 8%, it means that the amount of tax that was charge is
8/100 × x = 0.08 × x = 0.08x
Monica paid sales tax of $3.20 when she bought a new bike helmet. This means that
0.08x = 3.2
Dividing the left hand side and the right hand side of the equation by 0.08, it becomes
0.08x/0.08 = 3.2/0.08
x = 40
Gonna fix some typos with your question:
Carl wants to plant a garden that is 1 1/2 yards long with an area of 3 1/2 square yards. What is the width of the garden?
So with these type of questions, we divide 3 1/2 by 1 1/2, to find the missing length:
3 1/2 ÷ 1 1/2 = 2 1/3.
The width of Carl's garden is 2 1/3 square yards.
You cannot combine any the terms because x and y are two different variables. that is the most simplified you can get.
