Answer:
7 packs
Step-by-step explanation:
2.75p < 20
Divide both sides by 2.75
2.75p/2.75 < 20/2.76
Simplify
p = 7.27 (27 repeating)
Round
p = 7
Option b: 7000
Explanation:
The function that Larissa earns on an investment is

The amount of money originally invested by Larissa can be found using the compound interest formula,

where
P is the amount of money invested. (Principal)
r is the rate of interest which can be expressed as decimals.
x is the number of periods.
Hence, comparing
with the formula
, the principal amount can be determined.
Thus, the principal amount is 7000.
After 2 years value of the phone is $128. option C
Step-by-step explanation:
Given,
Original price of the phone = $ 800
Each year it loses
of its value.
To find the value of phone after 2 years.
In 1st years
The value of the phone is= $800 - (800×
)
= $ 800-240 = $ 320
In 2nd year
The value of the phone is= $320 - (320×
)
= $ 320 - 192 = $ 128
Hence,
After 2 years value of the phone is $128.
(g-h) would be (2a-1)-(3a-3) given the information. This equals -a+2. Finally, we have to multiply this by -4 which gives us -4(-a+2)=4a-8