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brilliants [131]
3 years ago
5

Need help please!!!

Mathematics
1 answer:
katrin2010 [14]3 years ago
4 0

Answer:

1. (A)

2.(C)

3. (C)

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Really need help with this pls help!!
worty [1.4K]

Let's carry this math sentence over to its natural, "shapey" element. We're going to look at each term not as an ordinary number, but as <em>the area of some shape</em>.

x² (read as "x <em>squared"</em>) can be seen as the area of a square with side lengths of x. 2x can similarly be seen as the area of a <em>rectangle </em>with a length of x and a width of 2. (Picture 1)

What's our question actually asking, though? Something about <em>perfect squares</em>. More specifically, we're looking for something to add on that'll <em>make this thing a perfect square</em>. We're trying to find a missing piece we can slot in to make a square, in other words. Problem is, our shapes don't look much like a square if we put them together right now. We need to do a little cutting and gluing first.

First, we're gonna cut the 2x rectangle lengthwise, getting two rectangles with an area of x, a length of 1, and a width of x. Next, we're going to attach them to the x² square, creating this shape that looks, strangely, like a square with a little bit missing from it (picture 2). What we're trying to do is <em>complete this square, </em>to find the area of that little missing chunk.

As it turns out, we have all the information we need for this. Notice that, using the lengths of the x rectangles, we can find that the square's dimensions are 1 x 1, which means that its area is 1 x 1  = 1.

If we tack this new area on to our original expression, we've "completed the square!" We now have a perfect square with side lengths of (x + 1) and an area of (x + 1)² (picture 3).

So, our final expression is x² + 2x + 1, and the missing constant - the area of the "missing square" we had to find to complete our larger one - is 1.

5 0
3 years ago
Read 2 more answers
Frank has devised a formula for his catering business that calculates the number of meat balls he needs to prepare the formula i
ira [324]

Answer:

96 meatballs are required

Step-by-step explanation:

We know that the formula for he catering business is

m=4a+2c

Where

c= the number of children, m=the number of meat balls, a= the number of adults

So if c = 8  and a = 20 then

m = 4(20) + 2(8)

m = 80 + 16

m = 96

Finally  96 meatballs are required for the party

4 0
3 years ago
Read carefully And choose the name of the student who made the correct statement.
dimaraw [331]

Answer:

Sterling made the correct statement.

Step-by-step explanation:

Feel free to give brainliest.

Have an outstanding day!

8 0
2 years ago
Math help! 20 Points!
erastova [34]
The anwer is 3 because it 3
4 0
3 years ago
Read 2 more answers
donovan. and three friends go to a fair they each spend 1/2 of their money on rides. then, they each spend $3 on food. at the en
pantera1 [17]
22 because, since they had $8 remaining, you add the $3 so that’ll equal 11, and then since they used 1/2 of their money, $11 plus 11 is 22.
3 0
3 years ago
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