Answer:
No, Angela is not correct.
As the method Jim was performing will also lead to the solution.
Step-by-step explanation:
We are given first equation as:
Ax + By = C
Second equation is:
Dx + Ey = F
Jim solved the equation as:
He begins by multiplying equation (1) by D and equation (2) by A.
and so by subtracting both the equations he will obtain a value of y.
and then put the y-value in any of the given two equations to obtain the value of x.
Angela Method:
you should have multiplied equation (1) by E and equation (2) by B.
and when she will subtract both the equations she will get the value of x first and then when she will put the value of x in any of the given equation she will obtain the value of y.
But both will get a value for x and y.
Hence, the method Jim was performing was also correct.
Answer:
25%
Step-by-step explanation:
1 Hr = 60 Minutes
Divide by 15 = 4
100/4 = 25%
I believe it is 30
Explained
Answer:
2, 4 and 6 are consecutive even integers that fit the criterion.
Step-by-step explanation:
Model the problem as an equation
let a be first integer, b be second, c be third
8a = b+c+6
Since these are consecutive even integers:
b = a + 2
c = b + 2 = a + 4
Substitute these equivalents into the equation
8a = (a+2)+(a+4)+6
Combine like terms
8a = a+2+a+4+6
8a = 2a + 12
Isolate a
6a = 12 (divide both sides by 6)
a = 2
Sub a=2 into b=a+2 and c=a+4
b=a+2 = 2+2 = 4
b=4
c=a+4 = 2+4 = 6
c=6
