URGENT step by step answer or just which number fine
Which pair of equations could not be used to solve the following equations for x and y?
4.x +2y = 22
–2x+2y =-8
1)
4x+2y=22
2x-2y=8

2)
4x+2y=22
-4x+4y=-16

3)
12x+6y=66
6x-6y=24

4)
8x+4y=44
-8x+8y=-8
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Step-by-step explanation:

1

step-by-step explanation:

you are throwing one dart

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500