MATHEMATICS HIGH SCHOOL

Help pls someone?!? )):

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

a(n) = n² - 3n - a(n-1) and a(1) = 4

We have a(1) = 4 and want a(2) (for which n = 2).

a(2) = 2² - 3(2) - a(2-1) → a(2) = 4 - 6 - 4 = -6 = a(2)

a(3) = 3² - 3(3) - (-6) = 9 - 9 + 6 = 6 = a(3)

a(4) = 4² - 3(4) - 6 = 16 - 12 - 6 = -2 = a(4)

a(5) = 5² - 3(5) + 2 = 12 = a(5)

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What is twenty divided by two, multiplied by the power of three.
Simplify 81.56 + n - 2.55.

F(x) = -7x - 1
f() = -8

Answers

Answer:

f(1) = -8

Step-by-step explanation:

Apparently, you want the argument of the function such that the function value is -8. Fill in the given information and solve for x:

-8 = -7x -1

-7 = -7x . . . . add 1

1 = x . . . . . . . divide by -7

Now, you know that ...

f(1) = -8

Not sure how to solve 2sinxcosx+cosx=0 Could you help?

Answers

$2sinxcosx+cosx=0\n\ncosx(2sinx+1)=0\iff cosx=0\ \vee\ 2sinx+1=0\n\ncosx=0\ \vee\ 2sinx=-1\ /:2\n\ncosx=0\ \vee\ sinx=-(1)/(2)\n\nx=(\pi)/(2)+k\pi\ \vee\ x=-(\pi)/(6)+2k\pi\ \vee\ x=(7\pi)/(6)+2k\pi\ to\ k\in\mathbb{Z}$

Find tan-1 1.4281 to the nearest degree.
a. 10°
b. 55°
C. 5°
d. 35°

Answers

Answer:

$\:x=55^(\circ \:\:)$

Therefore, option 'b' is correct.

Step-by-step explanation:

Let x be the angle

tan x = 1.4281

determining the $\tan ^(-1)\left(1.4281\:\right)$

$\:\tan \:x\:=1.4281\:$

$x=\tan ^(-1)\left(1.4281\:\right)$

$\:x=55^(\circ \:\:)$

Therefore, option 'b' is correct.

The ordered pairs (1, 81), (2, 100), (3, 121), (4, 144), and (5, 169) represent a function. What is a rule that represents this function?

Answers

The answer is y=(x+8)^2

Evaluate.
5 P 3 x 6 C 4

a. 150
b. 300
c. 900

Answers

Answer:

Option (c) is correct.

$^5P_3*^6C_4$ is 900

Step-by-step explanation:

Given :Expression $^5P_3*^6C_4$

We have to find the value of given expression $^5P_3*^6C_4$

Consider the given expression $^5P_3*^6C_4$

The possibility of choosing an ordered set of r object from n object is given by

$nPr=(n!)/(\left(n-r\right)!)$

and The number of subset of r elements from n elements $nCr=(n!)/(r!\left(n-r\right)!)$

Thus, $^5P_3=(5!)/(\left(5-3\right)!)==(5!)/(2!)=5\cdot \:4\cdot \:3=60$

and $^6C_4=(6!)/(4!\left(6-4\right)!)==(6!)/(4!\cdot \:2!)==(6\cdot \:5)/(2!)=15$

Thus, $^5P_3*^6C_4=60* 15=900$

Thus, $^5P_3*^6C_4$ is 900

The answer is 300 because if u x the 5x3=15 and divide 6 and 4 is 1.5 then multipy that 22 then you put the letters in the equations

The temperature is -2°F at 6 A.M. During the next three hours, the temperature increases 15°F. What is the temperature at 9 AM?

Answers

Answer:

13°F

-2+15=13

-2+2=0

15-2=13

0+13=13

13°F

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