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Cerrena [4.2K]
3 years ago
15

Show how to make a ten to find 12-4. Write the number sentence

Mathematics
2 answers:
aliya0001 [1]3 years ago
7 0
Subtract 2 from 12. 12-2 is 10. You can subtract 10 with 4, and then add 2. (10-4)+2=8.
Mariana [72]3 years ago
7 0

Answer:

Making tens is an strategy to help student to subtract using this number.

So, we could subtract 12-2 = 10. Now, to fins 12-4, we have to also find the way to transform the ten into 8, because 12-4=8. So, basically, by subtracting 2 units one more time we can get the 8 or 12-4; 10-2=8, and 12-4=8, therefore 10-2=12-4, which is true because 8=8.

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A family has a rectangular back yard that measures 5x+4 by 3x-2 they are building a square patio with side lengths that measure
belka [17]

Answer: 14x² - 4x - 17

Step-by-step explanation:

The formula for determining the area of a rectangle is expressed as

Area = length × width

The rectangular back yard measures 5x + 4 by 3x - 2. This means that the area of the rectangular back yard would be

Area = (5x + 4)(3x - 2)

Area = 15x² - 10x + 12x - 8

= 15x² + 2x - 8

The formula for determining the area of a square is expressed as

Area = length²

Length of square patio = x + 3

Area of square patio = (x + 3)(x + 3)

= x² + 3x + 3x + 9

= x² + 6x + 9

The expression for the area of grass that will be left in the back yard after the patio is built is

15x² + 2x - 8 - (x² + 6x + 9)

= 15x² + 2x - 8 - x² - 6x - 9

= 15x² - x² + 2x - 6x - 8 - 9

= 14x² - 4x - 17

8 0
3 years ago
Jose is looking for a new set of school supplies to buy. Jose remembers that the
Drupady [299]

Answer:

Each highlighter is $1.30

Step-by-step explanation:

First the formula is 10+4h=15.20. H represents the unknown cost of each highlighters. Solve for h by subtracting 10 on both sides. 4h=15.20 Then divide 4 on both sides to get h by itself. h=1.30 Therefore one highlighter would cost $1.30

3 0
3 years ago
Read 2 more answers
I need help with problem 6) A. Please help.
vampirchik [111]

Answer:

  • 60
  • 18

Step-by-step explanation:

The ratios are all 3 father steps to 5 son steps. Then ...

  son-steps = 5/3·father steps

  son-steps = 5/3·36 = 60

and

  father-steps = 3/5·son-steps

  father-steps = 3/5·30 = 18

___

As a <em>check</em>, you can realize that the numbers in the first blank, 36:60, are double those in the second blank, 18:30. The first of these, 36:60, is 3 times the row underneath it, 12:20.

5 0
3 years ago
Please help i have no idea how to do this
Arte-miy333 [17]

Answer:

x • (3x + 1) • (x + 2) • (2x - 3)

Step-by-step explanation:

8 0
3 years ago
I need help with this geometry math assignment I been struggling and I need help on it very fast and it is due today so please h
deff fn [24]

Answer:

One tip: Do the top first

Step-by-step explanation:

4 0
3 years ago
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