Answer:
648
Step-by-step explanation:
Answer:
b. equal to
Step-by-step explanation:
difference means subtract
19 - 4 = 15
5 * 3 = 15
and 15 is the answer for both so that means the blank is equal to (b)
Answer:
9
Step-by-step explanation:
Solve the equation
Area =1/2(heightxbase)
27=1/2(Xx6)
54=6x
9 =x
Subtract 5 to both sides so that the equation becomes -2x^2 + 6x - 1 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
x = [ -b ± √(b^2 - 4ac) ] / (2a)
x = [ -6 ± √((6)^2 - 4(-2)(-1)) ] / ( 2(-2) )
x = [-6 ± √(36 - (8) ) ] / ( -4 )
x = [-6 ± √(28) ] / (-4)
x = [-6 ± 2*sqrt(7) ] / (-4 )
x =3/2 ± -sqrt(7)/ 2
The answers are 3/2 + sqrt(7)/2 and 3/2 - sqrt(7)/2.
