reginahalstead reginahalstead

10-06-2019
Mathematics

contestada

Solve the equation 9b2 + 30b + 25 = 0.

A. b = –5⁄3
B. b = –3⁄5, b = 3⁄5
C. b = –5⁄3, b = 5⁄3
D. b = 5⁄3

Respuesta :

10-06-2019

Factor the equation into...
(3b+5)(3b+5)=0
Each factor 3b+5=0 so 3b=-5 so b=-5/3

Check:
9(-5/3)^2+30(-5/3)+25=
9(25/9)-50+25=
25-50+25=0
It checks,

So answer is A.-5/3

Answer Link

Otras preguntas

Some living things use another animal as a host to keep themselves alive. They might live on the inside or the outside of the host and damage its tissue. These

what are two of the deadliest STDs???

In which of the following did the United States become involved as an imperialist nation? A.) Korea B.) Northern Africa C.) Philippines D.) India

Formation of a lipid bilayer is energetically favorable. how does this arrangement result in higher entropy for the system, and thus make bilayer formation ener

In a geometric sequence the ____ between consecutive terms is constant

A. 1 and 8 B. 4 and 6 C. 5 and 6 D. 1 and 7 Please tell me why

Barney leaves a bar at 2am and gets arrested for Driving Under the Influence of Alcohol. He will first be subject to

Is "the dog was a big fluffy ball of dirt" a simile?

What role does the dialogue play in this excerpt from The Hound of the Baskervilles by Sir Arthur Conan Doyle? "Would it not be well in the first place to get

pls help me find perimeter and area, id really appreciate it. thank u!