Answer:
A. (-13,-3)
Step-by-step explanation:
Solve the system of two equations:

From the second equation:

Substitute it into the first equation:

So,

The solution is (-13,-4)
Answer:
30
Step-by-step explanation:
TAN (R) = SR / ST
TAN (R) = 2/ 2sqr3
CONVERT OF TAN ^-1 (2 / 2sqr3) = 30
Step-by-step explanation:
Principal(P) =$2200
Rate(R) =4%
Time(T)=2 yrs
Simple Interest=PTR/100
I=2200*4*2/100
=$176
Answer: 29
Step-by-step explanation:
Let the smaller number be x
Let the bigger number be x+2
The information given in the question can be represented in a equation as:
x + 2 + 2x = 4x - 27
3x + 2 = 4x - 27
4x - 3x = 27 + 2
x = 29
The smaller number is 29
1st hour 350 purched tickets @ $17.50 each = $6,125
the second hour 20% more people purchased tickets than the first hour - 350 x 20%=70 more than 1st hour.so 70 x $17.50=$1,225 so total sales is $6,125 + 1,225=$7350