Answer: x = - 3.5
Step-by-step explanation:
Rewrite the equation by completing the square.
4x2 + 28x + 49 = 0
Completing the square method :
Divide through by the Coefficient of x^2
x^2 + 7x + (49/4) = 0
a = 1, b = 7, c = 49/4
Move c to the right side of the equation
x^2 + 7x = - 49/4
Complete the square on the left hand side by squaring its half of the x term
(7/2)^2 = (49/4)
Add the output to both sides of the equation
x^2 + 7x + (49/4) = - (49/4) + (49/4)
(x + 7/2)^2 = 0
Square root of both sides
x + 7/2 = 0
x = - 7/2
x = - 3.5
Answer:
D
Step-by-step explanation:
in first step we must go on this way
17.50÷2=8.75
and D has this step
Answer:
hi
Step-by-step explanation:
<u>Question 6</u>
1) 
, 
, O is the midpoint of 
, 
(given)
2) 
are right angles (perpendicular lines form right angles)
3) 
are right triangles (a triangle with a right angle is a right triangle)
4) 
(a midpoint splits a segment into two congruent parts)
5) 
(LL)
<u>Question 7</u>
1) 
are right angles), 
2) 
(reflexive property)
3) 
are right triangles (a triangle with a right angle is a right triangle)
4) 
(LL)
5) 
(CPCTC)
<u>Question 8</u>
1) 
, point D bisects 
(given)
2) 
are right angles (perpendicular lines form right angles)
3) are right triangles (a triangle with a right angle is a right triangle)
4) 
(definition of a bisector)
5) (reflexive property)
6) (LL)
7) 
(CPCTC)
Answer:
cuantos billetes de 100.son en .100000?
