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3 years ago

The nth term of a sequence is n^2 -n-2 .find the sum of the first and third terms

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

Step-by-step explanation:

substitute n=1 and n=3 in the given equation

1 st term is (1)^2-1-2 = 1 -1 -2 = -2

3rd term is (3)^2-3-2 = 9-3-2=4

sum of 1st and 3rd term is -2 + 4 = 2

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Slice for the missing sides 45-45-90 triangle. show work thank you

Lelu [443]

Answer:

x and y are 5.66 units

Step-by-step explanation:

The triangle above is a right angled triangle ; and can be solved using trigonometric relation :

Using :

Sin 45 = opposite / hypotenus

Opposite = y ; hypotenus = 8

Sin 45 = y/8

y = sin 45 * 8

y = 5.66 units

Side length x ;

Sin 45 = opposite / hypotenus

Sin 45 = x / 8

x = sin 45 * 8

x = 5.66 units

3 0

2 years ago

If you flipped the graph of y = x2 + 2x - 2 vertically, you would get the graph of y = -(x2 + 2x - 2). true or false

lyudmila [28]

Hi friend,
If you flipped the graph y=x^2+2x-2 vertically, you would get the graph y=-(x^2+2x-2) TRUE.
Hope this helps you!

7 0

3 years ago

Read 2 more answers

Tracy walked for 3 1/2 miles . How many feet did she walk ?

marshall27 [118]

Answer:

18,480 feet

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Which system of equation should you use to solve this problem

Alex17521 [72]

Last option is the correct answer.

Step-by-step explanation:

Given that

Let x stand for the solution a and y stand for the solution B

So,

According to statement that

30 gallons have to be made

$x+y=30$

Solution A contains 29 percent bromine => 0.29x

Solution B contains 53 percent =>0.53y

And the mixture of 30 gallons contains 45% bromine

$0.29x+0.53y=30*0.45\\0.29x+0.53y=13.5$

Following equations will be used for solving the problem

$x+y = 30\\0.29x+0.53y=13.5$

Hence,

Last option is the correct answer.

Keywords: Equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

4 0

2 years ago

Convert 6 feet into meters. round to the nearest tenth

Montano1993 [528]

6 ft into meters would be 1.829, rounding to to nearest tenth would be 1.8

3 0

2 years ago