Answer:
x =-1
Step-by-step explanation:
replace y by 2x +4 in the first equation
2(2x + 4) = 6x + 10
4x + 8 = 6x + 10
-2x +8 = 10
-2x = 2
x = -1
64%, because 40% of 60% is 24%, and 2 mg of pure copper is 40% of the overall alloy, so add 24 and 40
The Time taken by Jacob to run the dash race is (80 - t) seconds
<h3>How to write algebraic expressions?</h3>
We are told that;
Total distance for the dash race = 500 yards
Time taken by Jacob to run the dash race = 80 seconds
Now, we are told that Juan ran the same dash race but used t less seconds than Jacob. Thus;
Time taken by Jacob to run the dash race = (80 - t) seconds
Read more about algebraic expressions at; brainly.com/question/4344214
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Answer:
its 0.25 or 2 one of those
Step-by-step explanation:
most likely 0.25 but
It means an extra line needed to complete a proof/problem in plane geometry.
