I think you forgot to attach a pic.
Answer:
-0.15
Step-by-step explanation:
-3/20
= -0.15
= -15%
Losing 30% of its value is the same as saying it is now worth 70% of its original value. To find 70% of 50,000 you can do 50,000 x 0.7. The answer will be the new value of the car after one year. After two years you are essentially finding 70% of the new value which is 70% of the original. More simply, it is 50,000 x 0.7 x 0.7. An equation for this (and the answer to 1b) is 50,000 x 0.7^t where t is the number of years.
1a (i) is $10500 (50,000 x 0.7^1)
(ii) is $2521.05 (50,000 x 0.7^5)
(iii) is $1412.38 (50,000 x 0.7^10)
1b 50,000x0.7^t
For this case we must solve the following equation:
Adding 5 to both sides of the equation we have:
Different signs are subtracted and the major sign is placed.
We multiply by 3 both sides of the equation:
We divide by 4 on both sides of the equation:
Thus, the solution of the equation is 
Answer:
Answer:
x = 3
Step-by-step explanation:
4(x+7)=9(x-1)+22
Begin solving for x by performing the indicated multiplication:
4x + 28 = 9x - 9 + 22
Combine the x terms:
28 = 9x - 4x - 9 + 22
28 = 5x + 13
Subtracting 13 from both sides isolates 5x:
15 = 5x. Then x = 3
