Answer:
We have, 2x+y=3 .......(1)
xy=1....(2)
In equation (2), we get
y=
x
1
..........(3)
y put in the equation (1)
2x+
x
1
=3
2x
2
+1=3x
2x
2
−3x+1=0
2x
2
−3x−1x+1=0
2x(x−1)−1(x−1)=0
x=1, x=
2
1
We take the value of x=1
x value put in equation (1)
2(1)+y=3
y=3−2
y=1
x=1
x and y value put (x+y)
x−y
=(1+1)
(1−1)
=2
0
=1
Hence, this is the answer
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Answer:
A. -8
Step-by-step explanation:
The average rate of change can be found with the formula
[f(b) - f(a)]/(b - a) on the interval a to b
Here, a = 3, b = 5, f(a) = -10, and f(b) = -26. Plug in the values and simplify...
[-26 - (-10)]/(5 - 3)
[-26 + 10]/2
-16/2
-8
The most simple way is to get 8 questions right on a ten question test. 8q/10q = 80%.
Answer:
There are 32 dimes and 25 quarters.
Step-by-step explanation:
q + d = 57 or q = 57 - d
25q + 10d = 945
substitute first equation into second equation:
25(57 - d) + 10d = 945
1425 - 25d + 10d = 945
-15d = -480
d = -480/-15 = 32
using first equation:
q = 57 - 32 = 25
check using second equation:
25(25) + 10(32) = 945 checks
Answer:
1.625 kg
Step-by-step explanation:
