Answer
39 bills of 1$
16 bills of 10$
Step-by-step explanation:
x-nr of $1
y-nr of $10
x*1+y*10=199
x+y=55 , x=55-y
so I use the substitution method
(55-y)*1+10y=199
55+10y-y=199
-55 -55
9y=144
y=144/9
y=16
so x=55-16
x=39
verify 16*10+39*1=160+39=199
Answer:
Number sentences can be true or they may not be true. For example: 10 + 5 = 15. ... So, a number sentence contains numbers, mathematical operations, equal to or inequality sign and a number after the equality or inequality sign.
Step-by-step explanation:
Answer:
The number is 59/5 or 11.8 (decimal)
Step-by-step explanation:
This sentence can be written as 5(x-6)=29
x-6 = 29/5
x = 29/5 + 6
x = 59/5 or x = 11.8
Since you have 7 liters in all you know that 7 minus 2 is 5.
2*14% + 5*x% = 7*34%
0.28 + 5*x% = 2.38
5*x% = 2.38 - 0.28
5*x% = 2.10
x% = 0.42
x = 42%
Chandra must add 5 liters of 42% solution.
Answer:
66 inches
Step-by-step explanation:
This implies that in this specific town in Texas, an average of 30 inches of rain falls every two weeks.
Amount of rain received every two weeks (14 days) = 30 inches.
For a 31 day month, we have:
= 2
Therefore for a 31 day month, the amount of rain received by the town can be determined as;
= 30 x 2
= 66.4285
= 66 inches
The amount of rain received by the town is 66 inches for the 31 days.