Answer:x>-4
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Let m the tens digit and n the ones
the Original number is 10m+n
7(m+n) =10m+n
7m+7n=10m+n
6n=3m
Reversing the number 10n+m
10n+m=18+n+m
9n=18
n=2
6n=3m
6(2)=3m
3m=12
m=4
the number is 10m+n=10(4)+2=42
Complete question :
A heavy rainstorm dumps 1.0 cm of rain on a city 5 km wide and 8 km long in a 2-h period. How many metric tons (1 metric ton = 103 kg) of water fell on the city? (1 cm3 of water has a mass of 1 g = 10−3 kg.) How many gallons of water was this?
Answer:
4 * 10^5 metric tonne
Step-by-step explanation:
Given that :
City dimension : 5km by 8km = 5*10^5 by 8*10^5 cm
Drop of rain = 1cm
Volume of rain within 2 hour period :
V = (5*10^5 * 8*10^5 * 1) cm³
V = 40 * 10^10 cm³
1cm³ = 1g
40 * 10^10 cm³ = 40 g
(40 * 10^10) * (10^-3) = 40*10^7 kg
1 metric tonne = 1 * 10^3 kg
x = 40*10^7 kg
x = (40 * 10^7) / 10^3
x = 40 * 10^(7 - 3) metric tonne
x = 40 * 10^4
x = 4 * 10^5 metric tonne
Answer:
none
Step-by-step explanation: they get it each year not month, ummm right
Answer:
The correct answer is the solution of the system of equations are w = 10 and m = -8. The answer is not at all reasonable.
Step-by-step explanation:
The two system of equations are m + 2w = 12 and m + 3w = 22 where m and w represent the number of men and women working in an office.
We subtract both the sides with each other in order to solve the system of equation.
⇒ m + 3w - m - 2w = 22 - 12
⇒ w = 10.
⇒ m = -8.
The values of w and m are not reasonable at all. Since m and w represent the number of men and women in an office, they cannot be less than zero.