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Zanzabum
3 years ago
8

Pre algebra please help

Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0
1. 0.108 2. 0.516 3.
Rom4ik [11]3 years ago
5 0
For the multiplicaion, what you want to do is multiply like you do normally. I'll help you do number 1.

.18
x .6

So multiply it as you would, then worry about the decimals. 8 x 6 is 48, put down the and carry the 4.
4
.18
x .6
8

Then it is 6 x 1 is 6. Add the 4 and you get 10.

.18
x .6
108

Now we focus on the decimals. For .18 you have to move the decimal up 2 and for .6 you have to move the decimal up 1. That means that for its product you have to move its decimal up 3. This make 108 into .108.

.108 is your answer.
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Answer:

See below, please

Step-by-step explanation:

The right:

{(y + c)}^{2}  - b \times (x + a) \\  = ( {y}^{2}  + 2yc +  {c}^{2} ) - bx - ba  =

= {y}^{2}  - bx + 2cy +  {c}^{2}  - ab

The left:

=  {y}^{2}  - 7x - 18y + 109

So, after comparing the right side and the left side of this equation, we know

1)

b = 7

2)

2c =  - 18 \\ so \\ c =  - 9

3)

{c}^{2}  - ab = 109

So,

a =  \frac{ {c}^{2}  - 109}{b}  =  \frac{ { (- 9)}^{2}  - 109}{7}  =  \frac{ - 28}{7}  =  - 4

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2 years ago
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tamaranim1 [39]

Answer:

5

Step-by-step explanation:

4 0
3 years ago
Sandra has ribbons that are 2/6 meter 3/4meter and 4/9 meter long .She needs to use the ribbon longer than 2/3meter to make a bo
timurjin [86]

Answer:

3/4 meter

Step-by-step explanation:

Need Common denominators to compare size

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2/6 compared to 2/3.  2/6 = 2/6 and 2/3 = 4/6.  

2/6 < 2/3 so 2/6 is too short

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3/4 > 2/3 so 3/4 is longer than 2/3

4/9 compared to 2/3  4/9 = 4/9 and 2/3 = 6/9

4/9 < 2/3 so 4/9 is too short

6 0
3 years ago
Read 2 more answers
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igor_vitrenko [27]
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4 0
3 years ago
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Zina [86]
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5 0
3 years ago
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