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Masteriza [31]
3 years ago
6

What are the important things an 8th grader needs to know about math?

Mathematics
2 answers:
gogolik [260]3 years ago
7 0
Always foucus on the teacher ask help when needed
tatuchka [14]3 years ago
5 0
Be prepared for lots of work and listen it will make math so much easier also ask questions from your teacher he or she is there for a reason. Practice practice practice!!!
You might be interested in
Rina Boutique advertises a discount of $ 54.72 on sandals. If the discount is 33.5 %,
Scrat [10]
About $73.05 or $73; multiply .335 with $54.72 then add that answer to $54.72
4 0
2 years ago
Which subset of the real numbers contains the square root of 50
Pie
There are an infinite number of such subsets. One of them is the set of real numbers in the interval (7, 8). Perhaps you're thinking "irrational" numbers, as opposed to "integers" or "rational" numbers.
8 0
3 years ago
21. If the area of the plane shape below is<br>36cm, find its height.​
mariarad [96]

Answer:

4 cm

Step-by-step explanation:

The figure is a parallelogram with area (A) calculated as

A = bh ( b is the base and h the perpendicular height )

Here A = 36 and b = 9 , thus

9h = 36 ( divide both sides by 9 )

h = 4 cm

4 0
3 years ago
Read 2 more answers
How you solve this ?
jonny [76]
You have to use Pythagorean theorem

12^2+20^2 = x^2

sqrt(144*400) = x^2
sqrt(544) = x

X = 4  sqrt(34)

3 0
3 years ago
Which of the following expressions is correct?
masya89 [10]

Answer:

The correct answer is: [A]: " -(-21)  =  21 " .

________________________________

Step-by-step explanation:

________________________________

Let us examine the answer choices given.

________________________________

Choice:  [A]:  " -(-21) = 21 .  This is correct;  

     → since a "negative value of negative value" is a "positive value" ; as shown in this case.  The equal sign holds true, since the

"negative of a "negative value" is equal to the "positive value" of that same "positive value equivalent."

________________________________

Choice: [B]:  " -(-21) = -21 .  This is incorrect.  As explained above:

    → a "negative of negative" is a "positive value"  .

This answer choice shows that a "negative of negative"; is a "negative" :

                                                      → which is:  INCORRECT.

    → Rule out:  "Choice:  [B]."

________________________________

Choice: [C]:  " -(21) = 21 .  This is incorrect.  The "negative" value [of a positive integer is not equal to the "equivalent positive value" of that same integer.

   → Rule out:  "Choice:  [C]."

________________________________

Choice: [D]:  " (-21) = 21 ";  This is incorrect.  In a conceptually similar way as explained above—(for  "Answer Choice:  [C]" — the "negative value equivalent" of an integer is NOT equal to the "equivalent positive value" [of that same integer.].

  → Rule out:   "Choice:  [D]."

________________________________

The correct answer is:  [A]:  " -(-21) = 21 " .

________________________________

Hope this is helpful to you!

   Best wishes!

7 0
2 years ago
Read 2 more answers
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