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Sauron [17]
3 years ago
15

ASAP Simplify both expressions pls. 1. 3y^2+3(6y^2-9) 2. 0.5(x^4-3)+11

Mathematics
1 answer:
mezya [45]3 years ago
7 0

Answer:

1.\ 21y^2-27

2.\ 0.5x^4+9.5

Step-by-step explanation:

Solving (1)

3y^2+3(6y^2-9)

Open bracket

3y^2+3*6y^2-3*9

3y^2+18y^2-27

Simplify like terms

21y^2-27

Solving (2)

0.5(x^4-3)+11

Open bracket

0.5*x^4-0.5*3+11

0.5x^4-1.5+11

Simplify like terms

0.5x^4+9.5

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prohojiy [21]
1. rational 2. irrational 3. irrational 4. rational
5 0
2 years ago
PLS help me Order four and seven tenths repeating, negative four and eight ninths, 490%, and −4.9 from least to greatest.
Digiron [165]

The order from least to greatest negative four and seven tenths repeating, negative four and eight ninths, 490%, and −4.9 from least to greatest is; option A

  • −4.9,
  • negative four and eight ninths
  • four and seven tenths repeating
  • 490%,

<h3>Ascending order</h3>

four and seven tenths repeating

= 4.77777777

negative four and eight ninths

= -4 8/9

= -4.888888888888888

490%

= 490/100

= 4.9

−4.9

Rearranging from least to greatest (ascending order)

  • -4.9
  • -4.888888888888888
  • 4.77777777
  • 4.9

Learn more about ascending order;

brainly.com/question/12783355

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6 0
2 years ago
234 is 45% of what amount
GaryK [48]

Answer:

520?

Step-by-step explanation:

I think

3 0
3 years ago
A plastic box has a length 4 cm longer than its width. The area of the rectangular top of the box is 77 square cm. Find the leng
finlep [7]

Answer: the length is 11 cm.

The width is 7 cm.

Step-by-step explanation:

Let L represent the length of the rectangular plastic box.

Let W represent the width of the rectangular plastic box.

The area of the rectangular top of the box is 77 square cm. This means that

LW = 77- - - - - - - ;- - - -1

The plastic box has a length 4 cm longer than its width. This means that

L = W + 4

Substituting L = W + 4 into equation 1, it becomes

(W + 4)W = 77

W² + 4W = 77

W² + 4W - 77 = 0

W² + 11W - 7W - 77 = 0

W(W + 11) - 7(W + 11) = 0

W - 7 = 0 or W + 11 = 0

W = 7 or W = - 11

Since the width cannot be negative, then W = 7cm

L = 77/7 = 11 cm

4 0
3 years ago
A number added to one third of itself equals 12 . what is the number​
Drupady [299]

Answer:

9

Step-by-step explanation:

x+1/3x=12

(3x+1x)/3=12

4x/3=12

4x=12×3

4x=36

x=36/4

x=9

8 0
3 years ago
Read 2 more answers
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