Answer:
x= 1/2
y=3
Step-by-step explanation:
it is easier to subtract both equation and obtain a new one
1) 6x+0.4y=4.2
2) -4x+0.4y=-0.8
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1) -2)= 10x+0=5 leading to x=1/2
Now just eval x=1/2 in any of the original equations, for instances
1) 6*(1/2) +0.4*y=4.2, which leads to y=3
Answer:
20
Step-by-step explanation:
100 + 60 = 160
There are 180 degrees in a triangle so we do 180-160 = 20
Answer:
47 degrees
Step-by-step explanation:
i am super smart
Answer:
D
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r the radius
(x - 5)² + (y - 4)² = 25 ← is in standard form
with centre = (5, 4) → D