Answer:
x2 + 10x +25 = (x+5)^2
Step-by-step explanation:
x^2 + 10x
To complete the square
Take the coefficient of x
10
Divide by 2
10/2 =5
Square it
5^2 =25
Add it
x2 + 10x +25
The coefficient of x divided by 2 is the factor we add to x inside the square
(x+5)^2
Answer:
H=25√3
Step-by-step explanation:
So you would use the 30°,60°,90° Triangle theorem to solve this problem
Since we are trying to find out the 60°, because the x is across from 60° we can assume that we are just going to plug in x√3.
Hopefully you understand, didn't really explain it that well...
4 qts= 1 gallon
ratio and proportion
4 qts/1gallon]=24 qts/x gallons
cross multiply
4x=24
x=6 gallons
hope this helps
let age of one brother =2x
let age of second brother=3x
ratio of ages = 2x/3x
in eight years
age of first brother =2x+8
age of second brother= 3x+8
ratio of ages after 8 years =3/4
cross multiplying :
4(2x+8) = 3( 3x+8)
8x +32 = 9x+ 24
x=8
age of older brother= 3x =3*8 =24 years
Answer:
x = 90
Step-by-step explanation:
If x = 3 and y = 4 then when y = 120 just find out what times 4 = 120
which is 30.
so just multiply 30 for x = 3, then the answer will be 90
x = 90
