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postnew [5]
3 years ago
11

What do you get when using the Quadratic formula for the equation x^2+4=20?

Mathematics
1 answer:
wolverine [178]3 years ago
4 0
x^{2} +4=20
x^{2} =20-4
x^{2} =16
x= \sqrt{16}
x=4
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12 x+12y = 156<br> 4x + 6y =62 I need help please
mojhsa [17]

Answer:

{x,y}={8,5}

Step-by-step explanation:

12x + 12y = 156  4x + 6y = 62

8 0
3 years ago
7. Are the ordered pairs below an arithmetic sequence or geometric
DochEvi [55]

Answer:

8. Arithmetic Progression

9. f(9) = 300

Step-by-step explanation:

Given

\{(1,55)\ (2, 45)\ (3, 35)\ (4, 25)\}

Solving (8): Arithmetic or Geometric

We start by checking if it is arithmetic by checking for common difference (d).

d = y_2 - y_1 = y_3 - y_2 = y_4 - y_3

This gives:

d = 45 - 55 = 35 - 45 = 25 - 35

d = -10 = -10 = -10

d=-10

<em>Because the common difference is equal, then it is an arithmetic progression</em>

<em></em>

Solving (8):

f(n) = f(1) + f(n-1)

To find f(9), we substitute 9 for n

f(9) = f(1) + f(9-1)

f(9) = f(1) + f(8)

We need to solve for f(8); substitute 8 for n

f(8) = f(1) + f(8 - 1)

f(8) = f(1) + f(7)

We need to solve for f(7); substitute 7 for n

f(7) = f(1) + f(7 - 1)

f(7) = f(1) + f(6)

We need to solve for f(6); substitute 6 for n

f(6) = f(1) + f(6 - 1)

f(6) = f(1) + f(5)

We need to solve for f(5); substitute 6 for n

f(5) = f(1) + f(5 - 1)

f(5) = f(1) + f(4)

From the function, f(4) = 25 and f(1) = 55.

So:

f(5)=55 + 25

f(5)=80

f(6) = f(1) + f(5)

f(6) = 55 + 80

f(6) = 135

f(7) = f(1) + f(6)

f(7) = 55 + 135

f(7) = 190

f(8) = f(1) + f(7)

f(8) = 55 + 190

f(8) = 245

f(9) = f(1) + f(8)

f(9) = 55 + 245

f(9) = 300

8 0
3 years ago
Will give brainliest
tatiyna

Answer:

y = 4x + -1

Step-by-step explanation:

clearly seen.

3 0
2 years ago
(8,72);y=x divided by 9
alexandr1967 [171]

Answer:

6800

Step-by-step explanation:

6 0
3 years ago
I need help. +brainliest. 25 pts+
Inga [223]

Answer:

i cant help with the first one but the others i think i can

- plastic (insulator) -stainless steel (conductor) -silver (conductor) -wood (insulator)

Also radiation could effect the system but changing the conductivity of some of the materials also change change the way the materials accept heat.  

Sorry about the first one :)

4 0
3 years ago
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