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Alex787 [66]
4 years ago
7

Write the first five terms of the sequence defined by the explicit formula an=21-2n^2

Mathematics
2 answers:
Rus_ich [418]4 years ago
8 0
The answer to the squence is either d or a i believe
nikitadnepr [17]4 years ago
4 0

Answer: D. 19, 13, 3, -11, -29

Step-by-step explanation:

The first five terms can be found by taking n= 1,2,3,4,5

The given sequence is :

a_{n} =21-2n^{2}

Substituting n = 1,2,3,4,5 we have :

a_{1} =21-2(1^{2} )=21-2=19.

a_{2} =21-2(2^{2} )=21-8=13

a_{3} =21-2(3^{2} )=21-18=3

a_{4} =21-2(4^{2} )=21-32=-11

a_{5} =21-2(5^{2} )=21-50=-29

The first five terms of the sequence are

D. 19, 13, 3, -11, -29

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3(58 - 6) - 2(4x + 5)?<br> Which expression is equal to
larisa86 [58]

Answer:

-8x + 146

Step-by-step explanation:

Step 1: Write out expression

3(58 - 6) - 2(4x + 5)

Step 2: Parenthesis

3(52) - 2(4x + 5)

Step 3: Multiply

156 - 2(4x + 5)

Step 4: Distribute

156 - 8x - 10

Step 5: Combine like terms (constants)

-8x + 146

7 0
3 years ago
Georgia adds two proper fractions and gets 8/7 as an answer<br>Work out<br><br>the two fractions.​
LenaWriter [7]

Answer:

1/2 and 9/14

Step-by-step explanation:

Let the first fraction be 1/2

Let the second fraction be x

1/2 + x= 8/7

x= 8/7-1/3

= 16-7/14

= 9/14

Hence the two numbers are 1/2 and 9/14

4 0
3 years ago
You’ll live 100 more years if you help me answer 1 through 5 :D!!!
Marysya12 [62]

Answer:

You need to give me a thanks and brainliest: 1. = 16 ; 2. = 100 ; 3. = 64; 4. = 604; 5. Cant see the problem in the screen shot.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
6,476 divided by 12 plz help me:(
jeyben [28]
It would be 539.666 but if you round up 540
6 0
3 years ago
Please solve this for me thank you!
melamori03 [73]

Answer:

620.14

Step-by-step explanation:

Original Equation:

\frac{4y}{1.025^4}+y-2y(1.05)^2=1500

Calculate exponents

\frac{4y}{1.103812890625}+y-2y(1.1025)=1500\\

Simplify:

3.6238025791990193084270042653997y + y - 2.205y = 1500

Add like terms

2.4188025791990193084270042653997y \approx 1500

Divide both sides by 7.012

y\approx 213.91y\approx620.14

6 0
2 years ago
Read 2 more answers
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