Answer:
Mr.Kim is presently 40 years old, and his daughter is 15 years old.
Step-by-step explanation:
K is Mr Kim's present age
D=his daughter's present age.
K=D+25 ; or Mr.Kim is his daughter's age plus 25 years.
K+10=2(D+10); or in 10 years, Mr Kim will be twice daughters age
Substitute the K from the first equation into the second equation and then solve for variable D.
(D+25)+10 = 2(D+10) Simplify.
D+35 = 2D+20 You must subtract D from both sides.
35 = D+20 Lastly, subtract 20 from both sides.
15 = D or D = 15
Mr Kim's daughter's is 15 years old.
Mr Kim's age is D+25
15+25 = 40 years old.
Answer:
There would be 104 rooms on 4 floors in total.
Step-by-step explanation:
If there were 26 rooms on 2 floors, then you multiply 26 x 4, the result would be 104 rooms on 4 floors in total.
Answer:
Jackson should work at least 8 hours this week to achieve his target.
Step-by-step explanation:
Jackson's hourly income = $25
His weekly spending budget = $130
Minimum amount to be pushed to the savings account = $50
So, minimum total amount Jackson should earn this week = 130 + 50 = 180
Number of hours to work this week = 
= 
= 8 rounded to next integer
Hence, Jackson should work at least 8 hours this week to achieve his target.
The third one C. Because if you just take a close look at it it make sense
