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hammer [34]
3 years ago
15

(a-2b)3 when a=-2 and b= -1/2

Mathematics
1 answer:
Aleks [24]3 years ago
6 0

Answer: (a-2b)3=3a-6b

=3x-2-6x-1/2

= -6+3

= -3

Step-by-step explanation:

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Vertex (0,0) focus (0,-1)<br> A) y=1/4 x^2<br> B) y=-1/4x^2<br> C) y=1/16x^2<br> D) y=-1/16x^2
hichkok12 [17]

Answer:B

Step-by-step explanation:

8 0
2 years ago
What is the solution of the system? Use any method.<br><br> 3x + 2y = 7<br> y = –3x + 11
Gnom [1K]

Answer:

(5,-4)

Step-by-step explanation:

SOLVE BY SUBSTITUTION:

STEP 1: Replace all occurrences of y with -3x+11 in each equation.

-3x+22=7\\y=-3x+11

STEP 2: Solve for x in the first equation.

x=5\\y=-3x+11

STEP 3: Replace all occurrences of x with 5 in each equation.

y=-4\\x=5

6 0
2 years ago
Find the total surface area of the following cone. Leave your answer in terms of pi.
kramer

Answer:

90π cm²

Step-by-step explanation:

Given: Radius of circular base= 5 cm

           height= 12 cm

   

Now finding the surface of cone.

Formula; Surface area of cone= \pi rl+ B

Where; r= radius

l= slant height

B is the area of base, which is circle.

Area of circle (B)= πr²

Area of circle (B)= \pi \times 5^{2} = 25\pi

∴ Area of circle (B)= 25\pi

Finding slant height (l)

Formula; l= \sqrt{r^{2}+h^{2}  }

⇒l = \sqrt{5^{2}+12^{2}  } = \sqrt{25+144 }

∴ l= \sqrt{169} = 13\ cm

Next, using the formula for finding surface area of cone.

Surface area of cone= 5\times 13\times \pi + 25\pi

⇒ Surface area of cone= 65\pi +25\pi = 90\pi

∴ Surface area of cone= 90π cm²

6 0
3 years ago
Translate this sentence into an equation.
gavmur [86]

Answer:

3c = 33

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
HELP PLSS
avanturin [10]
(4,20) is the only solution that works being that ur inequalities contain no equal signs.
5 0
3 years ago
Read 2 more answers
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