For this case we have a system of two equations with two unknowns:
We follow the steps below:
We add the equations:
We divide between 9 on both sides of the equation:
We substitute the value of "x" in the first equation and find the value of y:
Thus, the solution of the system is: (3, -1)
Answer:
(3, -1)
Answer:
Monday = -20
Tuesday = -20 + (-5) = - 25 degrees Celsius
Thursday = -20 + 3(-5) = - 35 degrees Celsius
Friday = -20 + 4(-5) = - 40 degrees Celsius
Saturday = -20 + 5(-5) = - 45 degrees Celsius
Step-by-step explanation:
Answer:
Number of boys = 675
Step-by-step explanation:
Given that:
There are 5 times as many boys as girls in a school.
Number of pupils in school = 810
Let,
x be the number of girls
y be the number of boys
According to given statement;
x+y=810 Eqn 1
y = 5x Eqn 2
Putting y=5x in the Eqn 1
x+5x=810
6x=810
Dividing both sides by 6
Putting x=135 in Eqn 2
y = 5(135)
y = 675
Hence,
Number of boys = 675
