Answer:
Step-by-step explanation:
Original equation
√x+6-4 = x
Isolate
√x+6 = 4+x
Raise both sides to the second power
(√x+6)2 = (4+x)2
After squaring
x+6 = x2+8x+16
Rearranged equation
x2 + 7x + 10 = 0
This equation has two rational roots:
{x1, x2}={-2, -5}
Original equation, root isolated
√x+6 = 4+x
Plug in -2 for x
√(-2)+6 = 4+(-2)
Simplify
√4 = 2
Solution checks !!
Solution is:
x = -2
Original equation, root isolated
√x+6 = 4+x
Plug in -5 for x
√(-5)+6 = 4+(-5)
Simplify
√1 = -1
Solution does not check
1 ≠ -1
4. In cell-B8, create a formula without using a function that multiplies the value.in.cell.B7. by the value-in-cell-B6-andthen adds-the-value in B7..Update.the-cell-reference to cell: B6, from a relative reference to a mixed-reference by making an absolute-reference to row.6..Copy-the-formula-from-cell-B8-to-the-range-B9:B11-and-then-copy-the-formulas. from the range-B8:B11-to-the-range-C8:H11.1 13. SALO extend the list of years to the range A15:A17.1 In-cell-B13, create-a formula without a function using absolute references that subtracts the values of cells.B5 and B7.from.cell-B6 and then multiplies the result.by.cell-B8. Copy the formula-from-cell-B13 to the range C13:H13.1 In-cell-B14, create-a formula without using a function that adds.1.to the value-in-cell B12 and then multiplies the result by the value-in-cell-B13Update-the-referenceto-cell B12, from a relative-reference to a mixed-reference by making an absolute reference to row.12. Copy the formula-from-cell-B14-to-the-range-B15:B17 and then copy the formulas.from-the-range-B14:B17 to the range-C14H17.1
Answer:
x=35
Step-by-step explanation:
3x+3=108
3x=108-3
3x= 105
x= 105/3
x=35
Y is the number of movies
x is the number of hours
It takes 2 hours per movie
Thus:
y = x/2
2y = x
x - 2y = 0
The answer is C
