MATHEMATICS MIDDLE SCHOOL

Which one is equivalent?

Answers

Answer 1

Answer:

Step-by-step explanation:

We have to solve the given expression to get the equivalent expression

So,

$(x+4)^2 -(x-4)(x+4)\n= x^2+8x+16-(x^2-16)\n=x^2+8x+16-x^2+16\n= 8x+32\n$

Now simplifying the options:

Option A:

$4(x+4) = 4x+16$

Option B:

$4(x-4)(x+4)\n=4(x^2-16)\n= 4x^2-64$

Option C:

$(x-4)-(x+4)\n= x-4-x-4\n= -8$

Option D:

$(x+4)[(x+4)-(x-4)]\n= (x+4)[x+4-x+4]\n= (x+4) (8)\n=8x+32$

We can see that option D's simplified form is same as the given expression.

Hence,

Option D: $(x+4)[(x+4)-(x-4)]$ is the correct answer

Keywords: Polynomials, expressions

Learn more about polynomials at:

#LearnwithBrainly

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Round 71290 to the nearest 10 what's the answer?

Answers

71290 because the ones are 0 and zero is lower than 5
so it wouldn't add anything to the tens

the rule is if the number is more than 5+ it will add 1 to the next number
for example if we have this number 189 and we want to round it to the nearest 10 ..
we will see the ones place is it more than 5+ ? YEAH bcz its 9 ...
so 9 will add one to the tense and the answer will be 190 :)

hope you got the point .

Is 9/16 less than or greater than 5/8

Answers

To find that, you multiply 5/8 by 2/2 because it makes the denominator 16, which would get you 10/16. Compare the two: 9/16 is less than 10/16.

The elevation of a building's basement is -12 feet. Given the building is square shaped and the total length of the building from basement to roof is 62 feet, what is the elevation of the building above ground?

Answers

picture it in your head
at -12 feet elevation (12 feet below ground level), the basement starts
62 feet from that level is the roof
so count 62 units up from -12 and get 50 feet above ground level (60-12=50)

answer is 50 feet above ground level

Answer:

its 50

Step-by-step explanation:none

A cat heart beats about 130 beats per minute .A kitten heartbeat can be as fast as 240 beats per minute.How many times does a kittens heart beat in one half hour?

Answers

21,600 minutes because 1 hour equals 60 mins. while half in an hour is 30 mins. and 60 + 30 = 90 so you multiply 240 by 90 getting 21,600

Jared is redoing his bathroom floor with tiles measuring 6 in. by 14 in. The floor has an area of 8,900 in. What is the least number of tiles he will need?

Answers

The least number of tiles Jared will need, if Jared is redoing his bathroom floor, with tiles measuring 6 in. by 14 inches, The floor has an area of 8,900 in, which is 106.

What is the area?

An object's area is how much space it takes up in two dimensions. It is the measurement of the number of unit squares that completely cover the surface of a closed figure.

Given:

The measure of tiles = 6 in. by 14 in. ,

The area of the floor = 8900 inches²,

Calculate the area of the tiles as shown below,

Area of tiles = 6 × 14

Area of tiles = 84 inches²

Calculate the number of tiles as shown below,

Number of tiles = The area of the floor / Area of tiles

Number of tiles = 8900 / 84

Number of tiles = 105.9 = 106

To know more about Area:

brainly.com/question/27683633

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Firstly we need to find an area of a single tile:

6 * 14 = 84 square inches

Now we just need to find out how many tiles of 84 square inches will fit in an area of 8900 square inches:

8900 ÷ 84 = 105,952380952381

Assuming we can't cut a tile into pieces, we may round the result to 106.

Answer: The least number of tiles Jared will need is 106.

What number is 35% of 72?