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dimaraw [331]
3 years ago
12

Simply –3(x + 3)2 – 3 + 3x.

Mathematics
2 answers:
Kazeer [188]3 years ago
5 0
The answer is -21
Hope this helps!
Nana76 [90]3 years ago
5 0
-6(x+3)-3+3x
-6x+18-3+3x
-3x+15
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Brittany and Ashley can paint a room in 7 hours if they work together. If Ashley were to work by himself, it would take him 2 ho
stich3 [128]

Answer:

Step-by-step explanation:

Brittany paints the room in x hours, completing 1/x of the room per hour.

Ashley paints the room in x+2 hours, completing 1/(x+2) of the room per hour.

Working together, they complete 1/x + 1/(x+2) = ⅐ of the room per hour.

7(x+2) + 7x = x(x+2)

14x + 15 = x^2 + 2x

x^2 - 12x - 15 = 0

x = [12 ±√(12²+60)]/2= 6±√51

6-√51 is an extraneous solution.

x = 6+√51 ≈ 13.14

Brittany paints the room in 12.14 hours

3 0
3 years ago
Rewrite as an exponential function<br> ln9=y
Contact [7]

ln9 = y can be rewritten into an exponential function as y = e^9

8 0
3 years ago
Expand and simpilfy (x+3)(x+5)<br> GIVING THE BRAINLIEST
umka21 [38]

Answer:

x^2+8x+15

Step-by-step explanation:

You can use FOIL method

(x*x)+(x*5)+(3*x)+(3*5)

x^2+5x+3x+15

x^2+8x+15

4 0
4 years ago
Solve for x.<br> 3(x + 2) + 4(x - 5) = 10
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Step-by-step explanation:

3x+6+4x-20=10

7x-14=10

7x=24

x=24/7

6 0
3 years ago
Read 2 more answers
A cookie company uses one cup of sugar for every 20 cookies it makes. Let S represent the total number of cups of sugar used, an
shtirl [24]
Well it says 1 cup of sugar (S) for every 20 cookis (N) is like saying the amount of cookies(N) is increased by a factor of 20 times the cups of sugar (S) used. which can be written:
cookies(N) = 20 * cups sugar (S)

So you just get rid of the words and use the variables S and N and get

N = 20S

that is the equation. to graph it just plug in a few numbers for s and get the n. It's just like x and y but where x is S and y is N
5 0
4 years ago
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