Find each sum:

56 + (– 56)
(– 240) + 370
(– 5.7) – (– 4.2)

56 + (- 56) = 0

(- 240) + 370 = 130

(- 5.7) - (- 4.2) = - 1.5

Step-by-step explanation:

56 + (- 56)

56 - 56

0

(- 240) + 370

- 240 + 370

370 - 240

130

(- 5.7) - (- 4.2)

- 5.7 + 4.2

4.2 - 5.7

- 1.5

0, 130, -1.5

Step-by-step explanation:

Lets go over a few things that will help answer the questions:

A + and - make a - sign

A - and a - make a + sign

Ok, now lets sum our first expression:

56+(-56)

Remembering above that a + and - make a - sign:

56-(56)

=

0

Next:

(-240)+370

This is just a postive adding to a negative. So its:

-240+370=130

Finally we have:

(-5.7)-(-4.2)

This may look a bit confusing, so lets clean it up a bit:

The parethese around the -5.7 dont matter, and can be removed:

-5.7-(-4.2)

And remembering that a - and - make a +:

-5.7+4.2

Now adding the postive to the negative value:

-1.5

It is still a negative because the postive value being added to to -5.7 was smaller, so it still was negative, just a smaller negative number.

Hope this helps!

the correct answer is semicircle

step-by-step explanation:

the answer is semicircle because the shorter arc joining two points on the circumference of a circle is known as the minor arc, the larger arc is called the major arc, and a semicircle is a half circle, formed by cutting a whole circle along a diameter line.

hope i .

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]