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3 years ago

Help please... almost done.

Mathematics

2 answers:

lina2011 [118]3 years ago

5 0

Step-by-step explanation:

solmaris [256]3 years ago

3 0

Answer:

S: 2,-7

T: 0,-4

R: 1,-7

Step-by-step explanation:

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Perform the indicated operation and write the result in the form a + bt. (4 +9t)(7 - 4t)

bulgar [2K]

The answer is 64+47i

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3 years ago

B) How many more "dots” would you need to completely fill a 5 by 5 square?

Komok [63]

Answer:

i think 25 or 80

Step-by-step explanation:

i hope i am roght goodluck

8 0

3 years ago

Solve cos(2x)=1-sin(x)

Vedmedyk [2.9K]

Given:

$cos(2x)=1-sin(x)$

Expanding using double angle formula,

$1 - 2 \sin^{2} (x) = 1 - \sin(x)$

Rearranging into a single equation,

$1 - 2 \sin^{2}(x) - 1 + \sin(x) = 0$

Combining like terms,

$- 2 \sin^{2} (x) + \sin(x) = 0$

Now multiplying each term by -1,

$2 \sin^{2} (x) - \sin(x) = 0$

Factor greatest common factors out,

$\sin(x)(2 \sin(x) - 1) = 0$

Applying Zero property rule,

$\sin(x) = 0 \: or \: 2 \sin(x) - 1 = 0$

• Solve the trignometric equation to find a particular solution,

$x = 0 \: or \: x = π$

$= > x = 2nπ \: or \: x = π + 2nπ$

• Find the union of the solution sets,

$x = nπ$ }

• Rearrange unknown terms to the left side,

$2 \sin(x) = 1$

• Divide both sides of the equation by the coefficient of variable,

$\sin(x) = \frac{1}{2}$

• Solve the trignometric equation to find a particular solution,

$x = \frac{π}{6} \: or \: x = \frac{5π}{6}$

$= > x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z$

}

☆ Now finding the union of both sets

$x = nπ \: or \: x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z$

Hence, the answer is $x = nπ \: or \: x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z$

3 0

3 years ago

Did you know that 4+4 is 8

Lilit [14]

Answer:

not really

Step-by-step explanation:

i know 4 + 4 is 8 tho

3 0

3 years ago

Jalen is painting her great room including the ceiling but not the floor. The room measures 20 ft long, 30 wide and 9 ft tall.

Luden [163]

4 cans of paint

$\sf ---> \ \ {\boxed {\boxed {\frac{area \ of \ room - area \ of \ floor}{area \ the \ paint \ covers} }}}$

$\hookrightarrow \sf {\dfrac{2(wl+hl+hw)- (lw)}{400}}$

$\hookrightarrow \sf {\dfrac{2((30)(20)+(9)(20)+(9)(30))-(20*30)}{400}$

$\hookrightarrow \sf {\dfrac{1500}{400}$

$\hookrightarrow \rm {\sf {3.75}}$

→ She should buy max 4 cans as she cannot buy 3.75 cans.

Here l refers to length, w refers to width, h refers to height.

3 0

2 years ago

Read 2 more answers