Question

Janelle and her best friend Carmen go shopping. The function p(x) = 5x^4 − 3x^3 + 2x^2 + 24 represents how much money each girl spent based on the number of hours they were shopping. If Janelle and Carmen each go shopping for 2 hours, how much money did they spend together?

$58
$62
$176
$124.

do not try to answer for points or I will delete your answer

Answer 1

p(x) = 5x^4 − 3x^3 + 2x^2 + 24

for x = 2

=>

p(2) = 5(2)⁴-3(2)³+2(2)²+24

= 80-24+8+24

= 88

so, the numbers of money that they spend together = 2×88 = $176

Answer 2

• p(x)=5x⁴-3x³+2x²+24

for x=2

p(2)

• 5(2)⁴-3(2)³+2(2)²+24
• 5(16)-3(8)+2(4)+24
• 80-24+8+24
• 80+8
• 88

Together

• 88(2)
• $176