tj5essieannab tj5essieannab
  • 21-11-2016
  • Mathematics
contestada

Find (fg)(-4) when f(x) = x + 5 and g(x) = 5x2 + 10x - 5.

Respuesta :

HomertheGenius
HomertheGenius HomertheGenius
  • 22-11-2016
f g = ( x + 5 ) · ( 5 x² + 10 x - 5 ) = 
= 5 x³ + 10 x² - 5 x + 25 x² + 50 x - 25 = 5 x³ + 35 x² + 45 x - 25 =
= 5 ( x³ + 7 x² + 9 x - 5 ) 
(f g) ( - 4 ) = 5 * ( - 64 + 112 - 36 - 5 ) = 5 * 7 = 35
Answer Link

Otras preguntas

2. Mark has scored 12, 14, 10, 8, and 5 points in the past 5 basketball games. Write and solve the inequality that can be used to solve for the number of points
Jayla got in her car and started driving toward her grandmother's house. After driving for 2 hours and 5 minutes, Jayla took a break for 1 hour and 20 minutes t
On a piece of paper, use a protractor to construct right triangle ABC with AB=8 cm, m∠B=30°, and m∠C=90°. Which statement is true about this triangle? AC=16 cm
what's 5x^2 + 2x - 7 = 0​
How did alliances with other city-states help the Aztec build an empire?
Select the correct answer. Read the excerpt from President Franklin Roosevelt's “Day of Infamy” speech delivered after the attack on Pearl Harbor. Which sentenc
A cereal box has a rectangular base with an area of 15 square inches its volume is 195 cubic inches. What is the height of the box? A 15 inches B 10 inches OC 9
The length of a radius of a circle, measured in millimeters, is represented by the expression y + 2.7. The diameter of the circle is 735 mm. What is the value o
solve for x!!!!!!!!!!
find the value of x.​