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irga5000 [103]
3 years ago
5

5 (3z-3) =30 it’s from delta math 8 grade

Mathematics
2 answers:
gulaghasi [49]3 years ago
5 0

5 (3z-3) = 30

15 z - 15 = 30

15 z = 30+ 15

15z = 45

z= 45/ 15

z= 3

Mkey [24]3 years ago
3 0

Answer:

5

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

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So start by putting the negative sign into the second polynomial.
-(6x^2-2x-9)
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then combine like terms with the first polynomial
5x^3+4x^2-6x^2-2x+9
and you will get
5x^3-2x^2+2x+9
Hope this helps you.
5 0
3 years ago
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7 0
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C) Work out<br> 2.9 x 105 * 7.2 x 102<br> (Over) 5 x 10-8
Zepler [3.9K]

Answer: 417,600,000,000,000

Step-by-step explanation: 2.9(10)^5(7.2)(10^2)/5(10^-8)

                                             (2.9)(100,000)(7.2)(10^2)/5(10^-8)

                                             (290,000)(7.2)(10^2)/5(10^-8)

                                             2,088,000(10^2)/5(10^-8)

                                             (2,088,000)(100)/5(10^-8)

                                             208,800,000/5(10^-8)

                                             208,800,000/5(1/100,000,000)

                                             208,800,000/1/20,000,000

                                             417,600,000,000,000

6 0
4 years ago
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