I need help with number 5 and explain how you got it

Mathematics

2 answers:

wolverine [178]3 years ago

5 0

Do 36 plus 8 plus 36 plus 8 because perimeter means to add and you have the add the numbers twice ☺️

koban [17]3 years ago

4 0

The height would be 10. 8+8=16 36-16=20 10×2=20 to get perimeter you add up all the sides in this case it's a rectangle so you would multiply 8 by 2 and then 10 by 2 and add

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Plz plz help urgently ❤️

Delicious77 [7]

Answer:

Step-by-step explanation:

5 0

3 years ago

50+51+52+...+101=...<br>Can you help me? I do not understand

Dmitriy789 [7]

Suppose

$S=50+51+52+\cdots+100+101$

At the same time, we can write

$S^*=101+100+99+\cdots+51+50$

Note that $S=S^*$ (just reverse the sum). Let's pair the first terms of $S$ and $S^*$ , and the second, and the third, and so on:

$S+S^*=(50+101)+(51+100)+(52+99)+\cdots+(100+51)+(101+50)$

Now, each grouped term in the sum on the right side adds to 151. There are 52 grouped terms on that same side (because there are 50 numbers in the range of integers 51-100, plus 50 and 101), which menas

$S+S^*=52\cdot151$