Answer:
Step-by-step explanation:
Let c be cost of each call and t represent cost of each text message.
We have been given that last week Ricki made 4 call and sent 20 text messages which cost him $4.
Cost of 4 calls would be .
Cost of 20 text messages would be
Total cost id $4.00.
We can represent this information in an equation as:
We are also told that this week he made 10 calls and sent 5 text messages which cost him $5.50.
Cost of 10 calls would be .
Cost of 5 text messages would be
Total cost id $5.50.
We can represent this information in an equation as:
Therefore, our required system would be:
Answer: 120362
Step-by-step explanation:
The exponential function for finding population is given as :
A = P
Where :
A = Total amount of growth after some given time
P = Original population
r = growth rate
t = total years
From the question , we will notice that there is a decrease in the population , then the formula to be used will be
A = P )
A = ?
P = 14000
r = 1.5% = 0.015
t = 10
substituting each given values into the formula , we have
A = 1400 ()
A = 14000 ( )
A = 14000 X 0.859730442
A = 120362.2619
Therefore : The population after 10 years is ≈ 120362
B= 9.49
Explanation:
Pythagorean theorem is a^2+b^2=c^2 soo 10^2 or 100-10=90 and the square root of 90 is 9.4868 simplified 9.49
Answer:
Z=18.5
Step-by-step explanation:
2(4z - 6 - 6) = 170 - 46
2(4z - 12) = 124 Use distributive property: a(b - c) = ab - ac
8z - 24 = 124 Add 24 to both sides
8z = 148 Divide both sides by 8