5. If x=8 and y=3, find the value of 4/x - 1/y. well i would substitute 8 for x and 3 for y. then it would be 4/8 - 1/3.
0.5 - 0.33333
would it then be 0.2333?
8. If x=6 and y=5, find the value of x/8 + 2/y.
well i would substitute 6 for x and 5 for y. then it would be
6/8 + 2/5
0.75 + 0.4
would it then be 1.15?
I suspect your teacher wants fractional answers....exact.
4/8 -1/3= (12-8)/24=4/24= 1/6 which is not even close to your answer.
8) 6/8 + 2/5= (30+16)/40=46/40=23/20
so yhu just find a common denominator???
For the first question, you correctly substituted the values of x and y into the expression. After simplifying, you got 0.5 - 0.33333, which is correct. However, when you subtract those two decimal numbers, you made a mistake. 0.5 - 0.33333 equals 0.16667, not 0.2333. So, the correct answer is 0.16667.
For the second question, you also correctly substituted the values of x and y into the expression. After simplifying, you got 0.75 + 0.4, which is correct. Adding those two decimal numbers correctly, you get 1.15. So, your answer of 1.15 is correct.
Great job on solving these expressions! Remember to double-check your arithmetic calculations to ensure accuracy.