Answer:
Step-by-step explanation:
Write 34 in tens and units.
34 = 30 + 4
9(30 + 4)
9 * 30 = 270
9* 4 = 36
270 + 36 = 306
After awhile if your practice enough, you can do them in your head.
Answer:
4,320
Step-by-step explanation:
7 is closer to 10 then 0. 4,310 + 10 = 4,320
Answer:
and
.
Step-by-step explanation:
To this relation be a function, the horizontal coordinates can't be equal. So, let's find the value of
that makes those coordinates equal.

Using the null factor property, we have

Therefore, the given relation is not a function when
and
.
Answer:
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Step-by-step explanation:
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3. We can see that
1+100=101
2+99=101
3+98=101
.................
and so on
From 1 to 100, there are 50 pairs that has the sum is 101
Z=101×50=5050
4. We can see that
1-2=-1
3-4=-1
5-6=-1
...........
and so on
There are 10 pairs that has sum is -1
Z= 10×(-1)=-10