Answer:
B
Step-by-step explanation:
Given
x² + 3x + 2 = 0
To factor the quadratic
Consider the factors of the constant term (+ 2) which sum to give the coefficient of the x- term (+ 3)
The factors are 2 and 1, since
2 × 1 = 2 and 2 + 1 = 3, thus
(x + 2)(x + 1) = 0
Equate each factor to zero and solve for x
x + 2 = 0 ⇒ x = - 2
x + 1 = 0 ⇒ x = - 1
44%
1. We assume, that the number 375 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 375, so we can write it down as 100%=375.
4. We know, that x% equals 165 of the output value, so we can write it down as x%=165.
5. Now we have two simple equations:
1) 100%=375
2) x%=165
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=375/165
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for 165 is what percent of 375
100%/x%=375/165
(100/x)*x=(375/165)*x - <em>we multiply both sides of the equation by x</em>
100=2.27272727273*x - <em>we divide both sides of the equation by (2.27272727273) to get x</em>
100/2.27272727273=x
44=x
x=44
Answer:
Step-by-step explanation:
<h3>Hope it is helpful...</h3>
Answer:
Step-by-step explanation:
3-(2x-5)=-4(x+2)
We simplify the equation to the form, which is simple to understand
3-(2x-5)=-4(x+2)
Remove unnecessary parentheses
3-2x+5=-4*(x+2)
Reorder the terms in parentheses
3-2x+5=+(-4x-8)
Remove unnecessary parentheses
+3-2x+5=-4x-8
We move all terms containing x to the left and all other terms to the right.
-2x+4x=-8-3-5
We simplify left and right side of the equation.
+2x=-16
We divide both sides of the equation by 2 to get x.
x=-8
Answer:
There are 12 floors in a hospital.
Step-by-step explanation:\
Each floor has 64 beds, but the hospital has totally 768 beds
So, 
(floors)
