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monitta
3 years ago
12

Need help on this for brainliest

Mathematics
1 answer:
Arisa [49]3 years ago
7 0

Answer:

Your answer is letter d

Step-by-step explanation:

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Find the formula for the nth term of the arithmetic sequence -39, 61, 161, 261, ...
maksim [4K]
<h3>Given that it is arithmetic</h3>

d = a_{2} - a_{1} = 61 - ( - 39) = 100

a_{n} = a_{1} + (n - 1)d \\ a_{n} = - 39+ 100 (n - 1) \\ a_{n} =  - 39 + 100n - 100 \\ a_{n} =  - 139 + 100n

6 0
1 year ago
For all values of x, f(x)=2x^2 and g(x)= x+1<br> Solve fg(x) = gf(x)
Andrej [43]

Answer:

-0.25

Step-by-step explanation:

→ Find fg(x)

2 ( x + 1 )² = 2x² + 4x + 2

→ Find gf(x)

2x² + 1

→ Equate them

2x² + 1 = 2x² + 4x+ 2

→ Move everything to the right hand side

0 = 4x + 1

→ Solve

x = -0.25

4 0
2 years ago
Read 2 more answers
Penny received an unexpected $5,000.00 gift from a distant relative. She invests it
leva [86]

Answer:

$9,000.00 is her original investment worth in 10 yrs.

5000 x 1.08 ^10 = 10794.6249864

Then subtract -500000 = 5794.62498636

Step-by-step explanation:

Why, because the first year is proved 5000 x 0.08 = 400

= 400 year 1 but cna keep only if stays in investment for 10 years

400 x 10 = 4000 interest on investment

5000+ 4000 = $9,000.00 SI

+ 1,794.62 Interest on interest if applies (this is called CI) and makes $10794.62

3 0
3 years ago
PLEASE HELP ME WITH THIS THANKS
Zarrin [17]

Answer:

The answer to your question is SA =  2419.34 m²

Step-by-step explanation:

Data

a = 11.42 m

side = 11 m

height = 20 m

Formula

SA = 2B + PH

Process

1.- Calculate P

Perimeter = P

P = 7(11)

  = 77 m

2.- Calculate B

B = Pa/2

   = (77)(11.42)/2

   = 879.34/2

   = 439.67 m²

3.- Calculate 2B

2B = 2(439.67)

    = 879.34 m²

4.- Calculate PH

PH = (77)(20)

     = 1540 m²

5.- Calculate SA

SA = 879.34 + 1540

     = 2419.34 m²

4 0
3 years ago
Read 2 more answers
a seagull flying over a lake drops a fish from 81 feet. after about how many secomds does the fish land in the water?
Oksi-84 [34.3K]
2 1/4 seconds would be the answer 

5 0
3 years ago
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