Answer:
X= 1
Step-by-step explanation:
2, + the 2 her brother gives her is too high, its 4.
which means we go lower.
0 can't be right, because 0 + 2 = 2, not 3.
lets try 1.
1 + 2 = 3.
So that means X = 3.
3x+2=32 and x=10 just if you're wondering.
Answer:
v = 7
is the value for which
x = (-21 - √301)/10
is a solution to the quadratic equation
5x² + 21x + v = 0
Step-by-step explanation:
Given that
x = (-21 - √301)/10 .....................(1)
is a root of the quadratic equation
5x² + 21x + v = 0 ........................(2)
We want to find the value of v foe which the equation is true.
Consider the quadratic formula
x = [-b ± √(b² - 4av)]/2a ..................(3)
Comparing (3) with (2), notice that
b = 21
2a = 10
=> a = 10/2 = 5
and
b² - 4av = 301
=> 21² - 4(5)v = 301
-20v = 301 - 441
-20v = -140
v = -140/(-20)
v = 7
That is a = 5, b = 21, and v = 7
The equation is then
5x² + 21x + 7 = 0
X represents the amount of money added in
320+85x=820+35x
The horizontal line is refered to as a fraction bar or a vinculum. There are also other names, but these two are the ones I know the best.