Answer:
a) x = 70
Step-by-step explanation:
70 (2) +20 +20
140 + 40
180
The equation to solve this problem is 2x-5=8. The answer is 13/2 or 6.5.
Answer:
Step-by-step explanation:
Equation: x+6=13
Solution x=7
I hope this helps!
Do well!
Answer:
Leaving as a radical form
Why?
Because that's the whole value if you convert it to a decimal you cannot write all the numbers, and in the radical form it has all the numbers
It would be useful when we are working with equations for example the quadratic equation, if you get that x=√5, you would want the exact value. And there are more useful
7x + 5y = 19
<u>-7x - 2y = -16</u>
<u>3y</u> = <u>3</u>
3 3
y = 1
7x + 5y = 19
7x + 5(1) = 19
7x + 5 = 19
<u> -5 - 5</u>
<u>7x</u> = <u>14</u>
7 7
x = 2
(x, y) = (2, 1)
The method would be a elimination method (the answer is C).
