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antiseptic1488 [7]
3 years ago
10

Solve this pls!!! I need to turn it into -3_____(x+2)(x-5)​

Mathematics
1 answer:
Art [367]3 years ago
7 0

Step-by-step explanation:

\dfrac{-3}{(x+2)(x-5)}\qquad\text{use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=\dfrac{-3}{(x)(x)+(x)(-5)+(2)(x)+(2)(-5)}\\\\=\dfrac{-3}{x^2-5x+2x-10}\qquad\text{combine like terms}\\\\=\dfrac{-3}{x^2-3x-10}

\dfrac{64x-8x^2}{10x-80}=\dfrac{-8x(x-8)}{10(x-8)}\qquad\text{cancel}\ (x-18)\\\\=\dfrac{-8x}{10}=-\dfrac{8x:2}{10:2}=-\dfrac{4}{5}x

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Can someone help with this?
Bumek [7]
4.5/3 = x/5

then:

x = 5 * 4.5 / 3 = 15/2 = 7.5


hope that helps

6 0
4 years ago
What is the total surface area?? Please help me I’m confused
Simora [160]

Answer:

216

Step-by-step explanation:

8 0
3 years ago
Ken can walk 40 dogs in 8 hours how many can ken walk in 12 hours
Jlenok [28]
It would half 8 hours to get 4 hours and 20 dogs
Next add the 4 hours and 20 dogs to the 8 hours and 40 dogs so
4+8=12 hours
20+40=60 dogs
So Ken can walk 60 dogs in 12 hours
6 0
3 years ago
Martin has 2 5/8 pounds of ground beef. He wants to divide the beef into equal sized portions to put into his freezer. The porti
Licemer1 [7]

Answer:

a) 7 equal sized pieces of 3/8 pounds

               7* 3/8 =  21/8

b) 3 equal sized pieces of 7/8 pounds

               3* 7/8 =  21/8

Step-by-step explanation:

Martin has 2 5/8 pounds of ground beef.

2 5/8 = 21/8 pounds = 2.625 pounds

Because 21 is divisible by 3 and 7, we can arrange the ground beef in two configurations

a) 7 equal sized pieces of 3/8 pounds

               7* 3/8 =  21/8

b) 3 equal sized pieces of 7/8 pounds

               3* 7/8 =  21/8

6 0
3 years ago
Please help as soon as possible! Kia's plant is 8 1/5 inches tall and is growing 2/3 of an inch each week. Lyric's plant is 10 7
boyakko [2]
To find the answer, you find out the height of the plants for each week until they're the same.

Equation: Growth × Week + Original Height

For Kia: 2/3w + 8 1/5
For Lyric: 1/6w + 10 7/10
Kia:
Week 0 = 8 1/5 in.
Week 1 = 8 13/15 in.
Week 2 = 9 8/15 in.
Week 3 = 10 1/5 in.
Week 4 = 10 13/15 in.
Week 5 = 11 8/15 in.

Lyric:
Week 0 = 10 7/10 in.
Week 1 = 10 13/15 in.
Week 2 = 11 1/30 in.
Week 3 = 11 1/5 in.
Week 4 = 11 11/30 in.
Week 5 = 11 8/15 in.

Solution: 5 Weeks
6 0
3 years ago
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