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topjm [15]
3 years ago
11

Simplify the following expression (3x-5)(4-9x)+(2x+1)(6x^2+5)

Mathematics
1 answer:
timama [110]3 years ago
6 0
Expand out the brackets and simplify, largest indices first.
12x³-21x²+67x+30
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I need help with this question
Finger [1]
I can’t see it that well sorry
8 0
4 years ago
A larger number is double the sum of 3 and a smaller number. The larger number is 2 less than 3 times the smaller number. If y r
Ratling [72]
Y > x
y = 2(3+x)
y = 3x-2
------------------------------
2(3+x) = 3x-2
2(3+x) - (3x-2) = 0
6 + 2x -3x + 2 = 0
8 -x = 0
x = 8
---------------------------
y = 2(3+x) = 2(3+8) = 22
y = 3x-2 = 3*8 -2 = 22
----------------------------------
x = 8 ; y = 22


7 0
3 years ago
Read 2 more answers
Find the lowest common denominator of 3/4 and 5/8 A. 16 B. 32 C. 8 D. 4.
Alekssandra [29.7K]
The answer is C. 8. Then both can have a denominator that looks like this..
6/8 and 5/8. Hope it helps!
6 0
4 years ago
A certain stylist charges $15 for a haircut and $30 for hair coloring. A haircut takes on average 30 minutes, while coloring tak
dalvyx [7]
  • Haircuts be x
  • hair coloring be y

#a

\\ \sf{:}\Rrightarrow 15x+30y\geqslant 150

\\ \sf{:}\Rrightarrow x+y\geqslant 10

And

\\ \sf{:}\Rrightarrow 0.5x+2y\geqslant 8

#2

Attached

#3

  • (8,2)

8 0
3 years ago
Nellie is buying bird seed to put in her bird feeders. she uses about 10 pounds of bird seed each week, but has room to store an
neonofarm [45]
Nellie has to calculate the price per pound for every bag.

1) 2.52 / 3.5 = 0.72 $/lb
2) 5.40/7.5 = 0.72 $/lb
3) 7.92/11 = 0.72 $/lb

Then,  price per pound  is the same for any bag. There is no advantage of purchasing one or other, given that she can store any quantity.
6 0
3 years ago
Read 2 more answers
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