Answer:
he is correct
Step-by-step explanation:
6+9 = 15
15 divided by 3 = 5
5 x 7 = 35
1)You convert the fractions into decimals so you get these
0.7, 0.77778, 0.875
the order from greatest to least is: 7/8, 7/9, 0.7
2) Same thing
6.05, 6.1, 6.07
now in order
6.1, 6.07, 6 1/20
Answer: x = 5, y = 2; Solution = (5, 2)
Step-by-step explanation:
Substitution
2x + y = 12
x + 2y = 9
x + 2y = 9
Subtract 2y from both sides
x = 9 - 2y
Now, substitute x for (9 - 2y) in the first equation
2x + y = 12
2 (9 - 2y) + y = 12
Distribute 2
18 - 4y + y = 12
18 - 3y = 12
Subtract 18 from both sides
-3y = -6
Divide both sides by -3
<em>y = 2</em>
Now to find x, substitute 2 for y in (x = 9 - 2y)
x = 9 - 2y
x = 9 - 2(2)
x = 9 - 4
<em>x = 5</em>
Solution: (5, 2)
Elimination
2x + y = 12
x + 2y = 9
Multiply the second equation by -2 to find y
2x + y = 12
(x + 2y = 9) -2
2x + y = 12
-2x - 4y = -18
Add both equations
2x and -2x are cancelled out
You get:
-3y = -6
Divide both sides by -3
<em>y = 2</em>
Substitute 2 for y in any of the equations to find x
I chose x + 2y = 9
x + 2y = 9
x + 2 (2) = 9
x + 4 = 9
Subtract both sides by 4
<em>x = 5</em>
Solution = (5, 2)
Btw you can use any of these methods, I used both so you could know that you get the same answer no matter the method.
Hope I helped!
Answer:
2
Step-by-step explanation:
0.02 = 2/100 so the answer is 2
a)The solution is the result of
2x−1=0 and x+3=0
x=1/2, −3
~I don't know the others
