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Georgia [21]
2 years ago
15

PLEASE Please answer ASAP!!! :)

Mathematics
2 answers:
natta225 [31]2 years ago
8 0

Answer:

No

Step-by-step explanation:

7 is a prime number It is an irrational number. -It has no square factors and it's square root cannot be simplified.

d1i1m1o1n [39]2 years ago
6 0

Answer: No it is not.

Step-by-step explanation: A rational number is a number that can easily be expressed as a fraction or decimal, and square root of 7 cannot be easily expressed.

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Show that cos2x=cosx
PSYCHO15rus [73]

cos (2x) = cos x

2 cos^2 x -1 = cos x   using the double angle formula

2 cos ^2 x -cos x -1 =0

factor

(2 cos x+1) ( cos x -1) = 0

using the zero product property

2 cos x+1 =0    cos x -1 =0

2 cos x = -1       cos x =1

cos x = -1/2       cos x=1

taking the arccos of each side

arccos cos x = arccos (-1/2)         arccos cos x = arccos 1

x = 120 degrees   x=-120   degrees           x=0

remember you get 2 values ( 2nd and 3rd quadrant)

these are the principal values

now we need to add 360

x = 120+ 360n      x=-120+ 360n      x = 0 + 360n  where n is an integer


3 0
3 years ago
Which graphs represent functions with the following key features?
Naddika [18.5K]

Answer:

Graph U

Step-by-step explanation:

A graph is used to illustrate the relationship between variables.

For graph U:

Graph U is positive on (-∞, ∞). The graph also increases on (-∞, ∞). The graph approaches 0 as x approaches -∞.

For graph V:

Graph V is positive on (-∞, ∞). The graph also increases on (-∞, ∞). The graph is negative as x approaches -∞.

For graph W:

Graph W is positive on (-∞, 0). The graph also increases on (-∞, 0). The graph approaches 0 as x approaches -∞.

For graph X:

Graph X is positive on (-∞, ∞). The graph also increases on (-∞, ∞). The graph is negative as x approaches -∞

For graph Y:

Graph Y is positive on (-∞, ∞). The graph also decreases on (-∞, ∞). The graph approaches 0 as x approaches ∞.

For graph Z:

Graph Z is negative on (-∞, ∞). The graph also decreases on (-∞, ∞). The graph is approaches 0 as x approaches -∞

8 0
3 years ago
I really really need help with this . No links
Diano4ka-milaya [45]

Answer:

pretty sure its 123

Step-by-step explanation:

3 0
3 years ago
How many meters are equal to 5,253 centimeters?
Arte-miy333 [17]

Answer:

52,530 centimeters

Step-by-step explanation:

<u>Step 1:  Convert Meters into Centimeters</u>

1 meter = 100 centimeter

5253 * 100 = 52,530 centimeters

Answer:  52,530 centimeters

3 0
3 years ago
determine the equation of the straight line which passes through the point 1 and 5 and is perpendicular to the line 3x + y is eq
xenn [34]

The straight line is perpendicular to y = -3x + 4.

Therefore, the gradient of the straight line must be 3.

The equation of the straight line is y = 3x + 2.

7 0
2 years ago
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