Answer:
The system has exactly one solution where x = 0 and y = -3.
Step-by-step explanation:
-6x + y = -3
7x - y = 3
(7x - 6x) + (y - y) = 3 - 3
x + 0 = 0
x = 0
7(0) - y = 3
0 - y = 3
-y = 3
y = -3
-6(0) + y = -3
0 + y = -3
y = -3
So, the system has exactly one solution where x = 0 and y = -3.
Hope this helps!
Answer:
Option C
Step-by-step explanation:
Given that area of a circle = 452.16 sq metres
Hence radius = 
After rounding off we get radius = 12metres
To find circumference
We know that circumference of a circle = 2pir
= 
Option C is right
Option D is right
9and9/8=10and 1/8
Explanation you have to multiply the 6 1/2 by 4 to get common denominator and then add the two improper fractions which will give you another improper fraction
Answer:
0.61 or 8.79
Step-by-step explanation:
h = 47t − 5t²
27 = 47t − 5t²
5t² − 47t + 27 = 0
Quadratic formula:
t = [ -b ± √(b² − 4ac) ] / 2a
t = [ -(-47) ± √((-47)² − 4(5)(27)) ] / 2(5)
t = (47 ± √1669) / 10
t ≈ 0.61 or 8.79
