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dusya [7]
3 years ago
14

Help me please????help

Mathematics
1 answer:
kari74 [83]3 years ago
4 0
Yo I need help I’m in the 8th grade help me with this pls
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(5x-1)(3x+2)(9x-4) simply
dimaraw [331]

Answer:

135x^3 + 3x^2 - 46x + 8.

Step-by-step explanation:

(5x-1)(3x+2)(9x-4)

= (5x - 1)(27x^2 + 18x - 12x - 8)

=  (5x - 1)(27x^2 + 6x - 8)

= 5x(27x^2 + 6x - 8) - 1(27x^2 + 6x - 8)

= 135x^3 + 30x^2 - 40x - 27x^2 - 6x + 8

= 135x^3 + 3x^2 - 46x + 8.

8 0
2 years ago
Read 2 more answers
5² x 5³ = <br><br>Choices: <br>5<br>55<br>5^5<br>5^6<br>​
Vesna [10]

Answer:

5^5

Step-by-step explanation:

when multiplying two expression like this you should add up their powers

in this case it's 2 + 3

4 0
3 years ago
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Julie has 300ml of juice, She gives of the juice away.<br> How much juice does she give away?
Aleks04 [339]

Answer: Up to 300 ml because that is all she has in total. I think the question is missing parts.

Step-by-step explanation:

5 0
3 years ago
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If postage costs $.54 for the first ounce and $.22 for the each additional ounce, calculate the cost of mailing a 10- ounce enve
sweet-ann [11.9K]

Answer:

Hence, the total cost of mailing 10 ounces is:

$ 2.52

Step-by-step explanation:

If postage costs $.54 for the first ounce and $.22 for the each additional ounce.

i.e. cost of first ounce=$ 0.54.

Now let x denote the number of ounces after the first ounce,

Hence, the cost of x ounces=$ (0.22×x)=$ 0.22 x

Hence, the cost of mailing (x+1) ounces is: $ (0.54+0.22 x)

Now, we have to find the cost of  mailing a 10- ounce envelope.

i.e. after the first ounce we need 9 more ounces.

Hence, the total cost of mailing is calculated as:

=$ (0.54+0.22\times 9)\\\\=$ (0.54+1.98)\\\\=$ 2.52\\

Hence, cost of mailing 10 ounces is:

$ 2.52

8 0
4 years ago
Read 2 more answers
A length of 9 and<br> a perimeter of 22
Bad White [126]

Answer:

Width is 2 if that's what you were looking for.

Step-by-step explanation:

I'm guessing it's a rectangle and you want the width?

22-9-9=2w

2w=4

The width is 2

4 0
3 years ago
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