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3 years ago

Tan theta * tan 2theta = 1, cos 2theta =?

Mathematics

1 answer:

lilavasa [31]3 years ago

6 0

Answer:123445

Step-by-step explanation: sorry I need to answer a question to get a free answer so sorry

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The rectangle below has a area x^2-x-72 square meters and a length of x+8 meters what expression represents the width of the rec

mixer [17]

ANSWER

$w = (x - 8)$

EXPLANATION

The given rectangle has area,

$A = {x}^{2} - x - 72 \: {m}^{2}$

It was given to us that, the length of the rectangle is l=(x+8)

To find the width, we need to factor, the expression for the area.

We split the middle term to get,

$A = {x}^{2} - 9x + 8x- 72$

We now factor by grouping;

$A = x(x - 9) + 8(x- 9)$

$A = (x + 8)(x - 9)$

We know that area of a rectangle is

$A = l \times w$

Hence the width of the rectangle is,

$w = (x - 8)$

8 0

3 years ago

Read 2 more answers

Y=__X+__ ??? plz answerrr

Paul [167]

Answer:

y=3 over -6x + 5

Step-by-step explanation:

put the 3 and -6 in a fraction

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3 years ago

One type of lightning bug glows once every 1 1/2 seconds. How many times can it glow in 1 minute?

KIM [24]

It can glow 40 times per minute

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3 years ago

Read 2 more answers

(-11x^2 +6) - (14x^2 +2)

Nataly [62]

Answer:

−1(5−2)(5+2)

Step-by-step explanation:

Eliminate redundant parentheses

(−11²+6)−1(14² +2)

Distribute

−11² + 6 -- 1(14² +2)

−11² + 6 - 14² − 2

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3 years ago

Calculate the average rate of change for the function

mezya [45]

$slope = m = \cfrac{rise}{run} \implies \cfrac{ f(x_2) - f(x_1)}{ x_2 - x_1}\impliedby \begin{array}{llll} average~rate\\ of~change \end{array}\\\\[-0.35em] \rule{34em}{0.25pt}\\\\ f(x)= 2(x-2)^2+1\qquad \begin{cases} x_1=-2\\ x_2=4 \end{cases}\implies \cfrac{f(4)-f(-2)}{4-(-2)} \\\\\\ \cfrac{[2(4-2)^2+1]~~ - ~~[2(-2-2)^2+1]}{4+2}\implies \cfrac{[9]~~ - ~~[33]}{6}\implies \cfrac{-24}{6}\implies -4$

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2 years ago