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3 years ago

Find the sum of the first 90 terms of the sequence –4, –1, 2, 5, 8, ...

Mathematics

1 answer:

Ray Of Light [21]3 years ago

5 0

Answer:

D. 11655

Step-by-step explanation:

First find the 90th term:

a90=a1+(n−1)d

= -4+89(3)=263

Then find the sum:

Sn = n(a1 + an) / 2

S90 = 90 (-4 + 263) /2

S90 = 23,310/2

<u>S90 = 11,655</u>

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Choose all of the expressions that are equal to 1,024.

Arte-miy333 [17]

The only one that gives 1024 is A.

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3 years ago

Find the area. Simplify your answer.<br> 2x<br> 3x

BlackZzzverrR [31]

Answer:

We know,

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= 1/2 * 6x

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Hope it helped

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3 years ago

Which of the binomials below is a factor of this trinomial? 10x^2+27x-28

Mumz [18]

Option A is correct i.e 2x+7 is a factor of trinomial $10x^2+27x-28$

Step-by-step explanation:

We need to find the factor of the trinomial $10x^2+27x-28$

Factoring:

$10x^2+27x-28\\=10x^2-8x+35x-28\\=2x(5x-4)+7(5x-4)\\=(2x+7)(5x-4)$

So, the factors are (2x+7) and (5x-4)

So, Option A is correct i.e 2x+7 is a factor of trinomial $10x^2+27x-28$

Keywords: Factorization

Learn more about Factorization at:

#learnwithBrainly

7 0

3 years ago

Carmine and Hiram are solving the following word problem.

valentina_108 [34]

Answer:

Both is the anwser.

Step-by-step explanation:

Look it this way its simple 7.20 plus 6.75 equals 13.95

6.75 plus 7.20 is 13.95 theres no decimals changing in this problem meaning that both of them are correct.

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3 years ago

Use the pattern below. Each figure is made up by squares that are 1 unit by 1 unit.

iogann1982 [59]

Answer:

Figure 1: 4

Figure 2: 8

Figure 3: 16

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Step-by-step explanation:

Go around each figure and count how many cube lengths it takes to go around.

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1 year ago