Answer:
x=2 and XM=11
Step-by-step explanation:
because M is the midpoint of the line, you know that both XM and ZM are equal and you know an expression for the lengths of both of these.
set these expressions equal and solve:
4x+3=3x+5 so by subtracting the 3x from the right side, moving it over to the left and subtracting 3 from the left side to move it over to the right, you get:
x=2
then to find XM, plug in this value of x to get XM=11
4(2)+3=11
D=(b^2)-(4)(a)(c)
36-(4)(-2)(13)= 139
Answer:
6 (or 6.15, depends))
Step-by-step explanation:
We can write 3 1/4 as 3,25, as 1/4=0.25. This will make our calculation easier.
Now, if 3.25 cups gives us 1 batch, and we have 20 cups, we just need to get how many times the number 3.25 enters on 20. This means we just need to divide 20 by 3.25:
20 / 3.25 = 6.15 (aprox)
So, with 20 cups she can bake 6.15 batches. If you can't have decimal numbers (because there are not decimal oh partial batches, for example), your answer is 6. This last point will depend on the statement of your exercise.
Another way of doing it is simply sum 3.25 until you arrive to 20:
3.25 + 3.25 = 6.5
3.25 + 3.25 + 3.25 = 9.75
...
3.25 + 3.25 + 3.25 + 3.25 + 3.25 + 3.25 = 19.5
So, with 19.5 cups you get 6 batches.
