Answer:
x=1 and y=4
Step-by-step explanation:
10x+y=14
2x-y=-2
12x=12; x=1
put x in the problems and y is 4
A.) A = P (1 + r)^t
P = 500 ; r = 3% ; t = 2
A = 500 (1 + 0.03)²
A = 500 (1.03)²
A = 500 * 1.0609 numerical expression
A = 530.45
A numerical expression is an expression that involves purely numbers and one or more operational symbols.
B) compound interest for 2 years.
530.45 - 500 = 30.45 is the compound interest for 2 years.
Part A
Chorus:
Expontential growth = b*a^x
b = 15
a = 1.12 (a= r+1), r = 12%
Which gives a function of f(x) = 15*1.12^x
Band
Linear growth = ax+b
a = 2
b = 30
Which gives a function of g(x)=2x+30
Part B:
f(9) = 15*1.12^9 = 41.59
g(9) = 2*9+30 = 48
Part C:
This is probably problem solving, where you're allowed to use calculators and other softwares.
Therefore you can use different softwares, and make f(x) = g(x).
I did this, and got it to 10.95427141
I'm thinking its 4 to the 12 power but I am not completely sure on this
The jacket cost 5 times as much as each skirt cost, which was s dollars, so it cost 5s dollars. She bought 3 skirts, so in total she spent 3s+5s dollars, or 8s dollars. If 8s=280, s=35. Each skirt cost s=35 dollars, and the jacket was 5 times that.
5*35=175
The jacket cost $175.