Answer:
19
Step-by-step explanation:
4 added into 2 plus 5 into 1 times 2 and plus 1
Answer:
C
Step-by-step explanation:
the only it has constant rate of change (slope, gradient or derivative at every point is equal)
Answer in one complete sentence:
____________________________________________
"The length of the frame is ten (10) inches."
_____________________________________________
Explanation:
_____________________________________________
Perimeter = P = 36 in.
Length = L = 2 +2
Width = w .
_____________________________________________
These are the two equations for the system of equations:
P = 2L + 2w = 36 in.
L = 2 + w
_____________________________________________
Solve for "L" (length) of the frame.
______________________________________
In the equation:
______________________________________
P = 2L + 2w = 36.
{Note: standard knowledge; and/or look up:
______________________________________
Formula for the Perimeter of a rectangle: P = 2L + 2w} ;
_______________________________________
We are given: P = 36 in.
Rewrite, substituting "2+w" for "L" ;
P = 2(2+w) + 2w = 36 ;
___________________________
Note: 2(2+w) = 2*2 + 2w = 4 + 2w .
Now, Rewrite the equation, substituting "(4 + 2w) for "2(2+w)" ;
__________________________________________________
P = (4 + 2w) + 2w = 36 ;
P = 4 + 2w + 2w = 36 ;
Combine the "like terms" ;
____________________________________________
+ 2w + 2w = 4w ;
____________________________________________
P = 4 + 4w = 36 ;
____________________________________________
↔ 4 + 4w = 36 ;
____________________________________________
Subtract "4" from EACH SIDE of the equation:
____________________________________________
→ 4 + 4w − 4 = 36 − 4 ;
____________________________________________
to get:
____________________________________________
→ 4w = 32 ;
____________________________________________
→ Divide EACH SIDE of the equation by "4" ; to isolate "w" on one side of the equation; and to solve for "w" ;
____________________________________________
→ 4w / 4 = 32 / 4 ;
→ w = 8 .
____________________________________________
Now, to solve for: "L" (the length).
____________________________________________
Length: L = 2 + w ;
→ L = 2 + 8 = 10 inches.
____________________________________________
Answer in one complete sentence:
____________________________________________
"The length of the frame is ten (10) inches."
____________________________________________
Tienes que usar la fórmula cuadrática:
(-b +/- √(b^2-4ac))/2a
Primero identificas los valores de a,b y c en kx^2-3x+2=0
K=a, b=-3, c=2
Luego sustituis en la fórmula y te queda:
(3+/-√(9-8k))/2k
Para que las raíces Sena reales se tienen que cumplir que 9-8k>=0
