Answer:
Mary 81
Sandy 30
Step-by-step explanation:
S-3=M/3
multiply by 3
3s-9=m
m=81
3s-9=81
add 9
3s=90
divide by 3
s=30
The coefficient of the x-term is -3. Add the square of half of that.
.. (-3/2)² = 9/4 . . . . . . the number you need to add.
x² -3x +9/4 = (x -3/2)²
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If the x² term has a coefficient other than 1, you need to factor that out first and deal with the remaining binomial. For example,
.. 2x² -6x = 2(x² -3x)
For this you would need to add 9/4 inside parentheses to get
.. 2(x² -3x +9/4) = 2(x -3/2)²
Of course, to keep the original value, you would need to subtract 2*(9/4) outside parentheses.
.. 2x² -6x = 2(x -3/2)² -9/2
Answer:
4/10
Step-by-step explanation:
Answer:
1 = 175ft cubed
2 = 58m cubed
3 = 140m cubed
4 = 180in cubed
Step-by-step explanation:
You have to split these complex shapes into parts and find the volume of each part. Then, add the parts' volumes together, which will be the total volume of these. The equation is V=bhw. V means volume, b means base, h means height, and w means width. Hope this helps!
