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3 years ago

Helpp! I really need help with Solving each equation & Writing the answer in exact form. I will mark brainlist asap

Mathematics

1 answer:

Westkost [7]3 years ago

6 0

_ _
1. x = (-8-√12)/2 = -4-√3 = 5.732

2. x_2=-3.606

x_1=3.606

3. b_2=-1.323

b_1=1.323

4. z =(-28-√72)/2=-14-3√ 2 = -18.243
z =(-28+√72)/2=-14+3√ 2 = -9.757

Feel free to correct me if wrong!

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5 Points

AnnZ [28]

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Step-by-step explanation:

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Collect like terms

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Write a recursive formula and an explicit formula for the following arithmetic sequence: -1,6,13,20,27

Luden [163]

Answer:

Recursive formula is: $a_1=-1 ; \ \ a_n=a_{n-1}+7$

Explicit formula is: $a_n=7n-8$

Step-by-step explanation:

We need to find recursive formula and explicit formula for arithmetic sequence -1,6,13,20,27

In the given sequence First term a₁= -1

Common difference d = 7

Finding Recursive Formula

The recursive formula is of type: $a_1= First \ term$ and $a_n=a_{n-1}+d$

Since the First term a₁ is -1 and common difference d is 7 so, the recursive formula for given arithmetic sequence will be:

$a_1=-1 ; \ \ a_n=a_{n-1}+7$

Finding Explicit Formula

The explicit formula is of type: $a_n=a_1+(n-1)d$

We have

First term a₁= -1

Common difference d = 7

So, explicit formula will be:

$a_n=-1+(n-1)7\\a_n=-1+7n-7\\a_n=7n-8$

So, explicit formula is: $a_n=7n-8$

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masha68 [24]

Answer:

Area of polygon MNOPQR = 13 units

Step-by-step explanation:

Area of smaller rectangle:

(7-3)= 4 units multiplied by (3-2) = 1 unit

= 4 sq. units.

Area of polygon MNOPQR

= 3*3 units + 4*1 units

= 9 units + 4 units

= 13 units

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