2 answers:
Answer:
- 36
Step-by-step explanation:
1. y= - 
x --> substitute y with 4 (given value)
2. 4 = - x --> by multiplying 9 both side get rid of the 1/9
(4= - x)9 --> 36= - x
3. multiply " - " to both side to make "- x" to "x" --> (36= - x) - --> - 36 = x
- 36 = x => x = -36
Answer:
47.5
Step-by-step explanation:
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You have to divide 90 and 5
Answer:
-3x^2 - 5y^2 = 36
Step-by-step explanation:
x^2+y^2=r^2
The answer is b with the angles
Answer: 10% of 45 is 4.5
So 30% of 45 is 13.5
Step-by-step explanation:
<span>2r + 3s= 9 <=> -6r -9s = -27;</span>
<span>3r + 2s= 12 <=> 6r + 4s = 24;
=> 0*r -5*s = -3 => s = 3/5;
2*r + 3*(3/5) = 9<=> 10*r + 9 = 45 <=> 10*r = 36 => r = 18/5;
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