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3 years ago

Select the formula for the xth term of the sequence. 3, 11, 19,

Mathematics

1 answer:

djyliett [7]3 years ago

8 0

Answer:

8n - 15

Step-by-step explanation:

for finding the nth term we need to figure out the difference between the numbers:

3,11,19 = difference of 8

multiples of 8:

8,16,24,32,40...

the nth term would be 8n - 5 because in order to get to 3 from 8, we minus 5

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I need help on two questions!

Inessa05 [86]

1) Answer: $\frac{x^{2}}{100} +\frac{y^{2}}{4} = 1$

<u>Explanation:</u>

The equation of an ellipse is: $\frac{(x-h)^{2}}{a^{2}} +\frac{(y-k)^{2}}{b^{2}} = 1$ ; where (h, k) is the center, "a" is the x-radius, and "b" is the y-radius.

Center Radius

x-axis: (10 + -10)/2 = 0 10 - 0 = 10

h = 0 a = 10

y-axis: (2 + -2)/2 = 0 2 - 0 = 2

k = 0 b = 2

Now, input the values into the equation:

$\frac{(x-0)^{2}}{10^{2}} +\frac{(y-0)^{2}}{2^{2}} = 1$

$\frac{x^{2}}{100} +\frac{y^{2}}{4} = 1$

************************************************************************

2) Answer: $\frac{x^{2}}{1} +\frac{(y+2)^{2}}{4} = 1$

<u>Explanation:</u>

Vertices are: (0, 1) and (0, -5) ------> x-values are the same, y = 1, -5

Covertices are: (-1, -2) and (1, -2) ----> y-values are the same, x = -1, 1

Center Radius

x-axis: (-1 + 1)/2 = 0 1 - 0 = 1

h = 0 a = 1

y-axis: (1 + -5)/2 = -2 1 - (-2) = 3

k = -2 b = 3

Now, input the values into the equation:

$\frac{(x-h)^{2}}{a^{2}} +\frac{(y-k)^{2}}{b^{2}} = 1$

$\frac{(x-0)^{2}}{1^{2}} +\frac{(y-(-2))^{2}}{3^{2}} = 1$

$\frac{x^{2}}{1} +\frac{(y+2)^{2}}{9} = 1$

3 0

4 years ago

What is the slope of the line passing through the points (1, 3) and (3,9)?

Vikentia [17]

Answer:

Step-by-step explanation:

slop formula:

y2-y1

____

x2-x1

y2 is 9 and y1 is 3, so y2-y1 is 6

x2 is 3, x1 is 1, so x2-x1 is 2

6/2=3

4 0

3 years ago

Need help ASAP will give brainly

prisoha [69]

Answer:

3 0

3 years ago

What are the zeros of the function? f(t)=t2−13t+36 Enter your answers in the boxes. and

Brrunno [24]

Answer:

4 and 9

Step-by-step explanation:

t2-13t+36=0

factors of 36 are:

1,2,3,4,6,9,12,18,36

factors that add up to 13 are: 9*4

factorise the equation:

(t-9)(t-4)=0

t-9=0 ---> t=9

t-4=0 ---> t=4

5 0

3 years ago

Read 2 more answers

Tablet: $439, 40% off find the discount

swat32

Answer:

439 x 0.4 = 175.6 so the discount is 175.6

Step-by-step explanation:

40% is equal to 0.4 and you just multiply. If you want to find the discount price just subtract the discount off.

Hope this helps can I have brainliest

3 0

3 years ago