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densk [106]
3 years ago
13

Factor completely 81x2 - 4

Mathematics
1 answer:
STALIN [3.7K]3 years ago
8 0

Answer:

168

Step-by-step explanation:

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What is the area of the figure?
Keith_Richards [23]

Answer:

The answer is 88 square inches. (A)

Step-by-step explanation:

The shape is broken up into 2 right triangle sand 2 rectangles.

The area of the triangle is 12. You subtract the way it is cut in half where the dashed line that sais (4 in.) so you take 7 - 4 = 3. Now that the 3 is left meaning it is the height  of the triangle. and then the bashed line that says

(8 in.) is the base of the triangle. Multiply that and it is 24 but you have to divide by 2 which gives you 12. since there are "Identical" triangles what I do is add 12 which will give you 24 again bc of both triangles combined.

As for the rectangle is both dashed lines (4 in. And 8 in.) multiply it gives you 32, again since here is another "Identical" rectangle you add 32 + 32 = 64 (Both rectangles combined)

Lastly add 64 + 24 = 88

7 0
3 years ago
How do you evaluate expressions?
Anton [14]
To evaluate<span> an algebraic </span>expression<span>, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then </span>evaluate<span> the </span>expression<span>.</span>
5 0
3 years ago
6. A store orders 8 boxes of notebooks.
Tamiku [17]

Answer: 1,152 notebooks

Step-by-step explanation:

You just do 144 x 8. I’m not really sure what they mean when they say use breaking apart method. Maybe break them up into 8 group of 144. Then just add 144 together 8 times instead of multiplying hope this helps. :)

5 0
3 years ago
In the school election. James ran against Andrew for Secretary. James received 75% of the votes. If 240 students voted, how many
Mekhanik [1.2K]
So, 75% is the same as 3/4 right? The best way to do this would be to first find 1/4.

240/4 = 60

Now you know that 1/4 equals 60.

but.... you have 3/4 

60 x 3 = 180

180 kids voted for James. 
4 0
4 years ago
Find the indicated term of the given arithmetic sequence. a1=45, d= -3, n=10
klasskru [66]

In this sequence, we're given the first term, which is 45.

The difference between each term is -3, which means 3 will be subtracted in each term.

We're asked to find the value of the tenth term, and we can do so by using this formula:

a(n) = a(1) + d(n - 1)

Replace values.

a(10) = 45 + -3(9)

a(10) = 18

<h3>The value of the tenth term is 18.</h3>
3 0
3 years ago
Read 2 more answers
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