Answer:
x = -1, y = -5
Step-by-step explanation:
x + y = -6
2x - y = 3
Add the two equations together to eliminate y
x + y = -6
2x - y = 3
------------------
3x = -3
Divide by 3
3x/3 = -3/3
x = -1
Now find y
x+y = -6
-1+y = -6
Add 1 to each side
-1+1 +y = -6+1
y = -5
Note x^2 =y and rewrite this quartile equation in y and will get a quadratic what you need to solve it
f(x) = x^4 +21x^2 -100 note x^2 =y
f(y) = y^2 +21y -100
y^2 +21y -100 = 0
D = 21^2 -4(-100) = 441 +400 = 841
y_1,2 = (-21 +/- sqrt841 )/2 = (-21 +/- 29)/2 = -50/2 = - 25 and 8/2 = 4
so y_1 = - 25 and y_2 = 4
x_1,2 = sqrt(y_1) = sqrt(-25) = +/- 5i
x_3,4 = sqrt4 = +/- 2
hope this will help you
Answer:
b
Step-by-step explanation:
1 month=10
2 months= 15
3 months= 20
4 months= 25
5 months= 30
6 months= 35
7 months= 40
8 months=45
9 months= 50
10 months= 55
11 months= 60
12 months= 65
13 months= 70
14 months= 75
15 months =80
16 months= 85
17 months= 90
18 months= 95
19 months= 100
20 months= 105
21 months= 110
22 months=115
23 months 120
25 months= 125
26 months=130
27 months=135
28 months=140
29 months= 145
30 months= 150
31 months= 155
32 months =160
33 months= 165
34 months=170
35 months= 175
OR YOU COULD DO THIS:
Since he wants to save up to $175 and every month he add five dollars. You could divide 5 to 175 and it would equal 35 so he would have to save until 35 months to be able to afford the saddle.