Answer: See below
Explanation:
3x - 4y = 13 (1)
2x + y = 5 (2)
——————
3x - 4y = 13
4(2x + y = 5) (2) times 4
——————-
3x - 4y = 13
8x + 4y = 20
——————-
11x = 33
x = 33/11
x = 3
Plug x = 3 in (2):
2(3) + y = 5
6 + y = 5
y = 5-6
y = -1
Thus, x = 3 and y = -1
Answer:
A = P ( 1+ i )^n
A = 10,000(1+0.025)^10
= 10,000(1.025)^10
= $12,800.84
Step-by-step explanation:
A = future amount
i = interest rate
n = number of years
P = Present value
i.e i = 2.5% , P = $10,000 and n = 10 years
X=10 because. (X-3)=-49. so (10-3) with the power of 2=-49
Answer: he washed 18 windows
Step-by-step explanation: count by 10
