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MariettaO [177]
4 years ago
11

Pls help me...how do u factor that ?

Mathematics
1 answer:
Leya [2.2K]4 years ago
4 0

Answer:

(2x - 1)(2x + 1)(x - 7)

Step-by-step explanation:

We use grouping to factor.

Step 1: Group 1st 2 terms together and factor

4x³ - 28x²

4x²(x - 7)

Step 2: Group last 2 terms together and factor

-x + 7

-1(x - 7)

Step 3: Combine

(4x² - 1)(x - 7)

Step 4: Factor out quadratic

(2x - 1)(2x + 1)(x - 7)

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What is the value of sinθ given that (3, −7) is a point on the terminal side of θ ? −758√58 758√58 358√58 −358√58?
Svetach [21]

Answer:

\boxed{\sin(\theta)=-\frac{7}{58}\sqrt{58}}

Step-by-step explanation

The given point (3,-7) tells us that the terminal side of \theta is in the fourth quadrant.


From the diagram in the attachment,

We can use the Pythagoras Theorem to find the length of the hypotenuse of the right triangle.

Let the hypotenuse be h\: units. Then,

h^2=7^2+3^2


h^2=49+9


h^2=58


\Rightarrow h=\sqrt{58}


Now we use the sine ratio;


\sin(\theta)=\frac{Opposite}{Hypotenuse}.


But since the terminal side of \theta is in the fourth quadrant, the sine ratio must be negative.


This implies that;


\sin(\theta)=-\frac{7}{\sqrt{58}}.


We rationalize the denominator to get;


\sin(\theta)=-\frac{7}{58}\sqrt{58}.




3 0
3 years ago
What is 2.45 written as a percent
soldier1979 [14.2K]

Answer:

0.0245

Step-by-step explanation:

1. Divide 2.45 by 100 since you are finding it as a percent, which is 100.

3 0
4 years ago
Read 2 more answers
Find the value of f(5) for each function. f(x) = 6 + 3x
frozen [14]

Answer:

f(5) = 21

Step-by-step explanation:

Step 1: Define

f(x) = 6 + 3x

f(5) is x = 5

Step 2: Substitute and Evaluate

f(5) = 6 + 3(5)

f(5) = 6 + 15

f(5) = 21

3 0
3 years ago
The given bar graph shows the percentage of U.S. women in the labor force from 1960 through 2010. The function f left parenthesi
ipn [44]

Answer:

Half of year 2043

Step-by-step explanation:

The function is: f(x) = 3.5√x + 38

where f(x) represents the percentage of U.S. women in the labor force x years after 1960.

Replacing f(x) = 70 and isolating x, we get:

70 = 3.5√x + 38

3.5√x = 70 - 38

√x = 32/3.5

x = 9.14²

x = 83.5

This means, in year 1960 + 83.5 = 2043.5, that is, at half of year 2043

3 0
3 years ago
Factor out the gcf<br><br> -240c^2+ 30c^5+ 18c^4
exis [7]

Answer:

6c^2(-40 + 5c^3 + 3c^2)

Step-by-step explanation:

These three terms have the common factor c^2.  Thus:

-240c^2+ 30c^5+ 18c^4 = c^2(-240+ 30c^3+ 18c^2).

Recognizing that 6 is common to all three terms inside the parentheses, we get:

6c^2(-40 + 5c^3 + 3c^2)  This is as far as factoring of this expression can be taken.

8 0
3 years ago
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