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Ghella [55]
2 years ago
13

Four times the sum of x and 5 as an algebraic expression

Mathematics
2 answers:
Anuta_ua [19.1K]2 years ago
5 0

Answer:

20x

Step-by-step explanation:

Multiply the numbers.

4 * 5x

20x

Fynjy0 [20]2 years ago
4 0
4(x+5)

hope this helps
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Which of the following is not an identity?
Shkiper50 [21]
A ) cos² x · 1 / sin x - 1 / sin x = - sin x
cos² x - 1 / sin x = - sin x 
- sin² x / sin x = - sin x
- sin x = - sin x     ( correct )
B ) sin x ( cos x / sin x + sin x / cos x ) = 1 / cos x
sin x · ( cos² x + sin²x ) / sin x cos x = 1 / cos x
sin x · 1 / sin x cos x = 1 / cos x
1 / cos x = 1 / cos x  ( correct )
C ) cos² x - sin² x = 1 - 2 sin² x
1 - sin² x - sin² x = 1 - 2 sin² x
1 - 2 sin² x = 1 - 2 sin² x   ( correct )
D ) 1/sin²x + 1/ cos²x = 1
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Answer: D ) is not an identity. 
8 0
2 years ago
Isolate the variable to find the solution of the equation. 6. 2w = 18. 6 w = 3 w = 12. 4 w = 24. 8 w = 115. 32.
Anarel [89]

An equation is formed of two equal expressions. The solution of the equation is w=3.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

In order to solve the equation, we need to isolate the variable in the following manner, therefore, the solution of the equation can be written as,

6.2w=18.6

Divide both sides of the equation by 6.2,

6.2w=18.6\\\\\dfrac{6.2w}{6.2}=\dfrac{18.6}{6.2}\\\\w = 3

Hence, the solution of the equation is w=3.

Learn more about Equation:

brainly.com/question/2263981

7 0
2 years ago
What is -4d 3 + 28d 2 - 4d
Svetlanka [38]

Answer: 20d + 5

Step-by-step explanation:

First we need to combine like terms.

In this equation we can see that they're are 3 numbers containing the letter D we have -4, -4, 28.

We're going to combine -4 and -4 to get -8 and then combine -8 to 28 getting 20d

Afterwards we're going to combine 3, 2 equaling 5.

7 0
3 years ago
What is the length of ST, to the nearest tenth of a yard?
rewona [7]
Let's say that ST is side b
<span><span>Use the Law of Sines to find side b.</span><span> 
   b / sin(B) = a / sin(A)</span><span> 
b / sin(59°) = 7 / sin(79°)</span><span> 
                b = (sin(59°) x 7) / sin(79°)</span><span> 
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That is answer B.) 6.1 yards

Hope this helps!</span></span>
3 0
3 years ago
Read 2 more answers
2 3/4 convert this number into an Improper fraction
Nata [24]
Answer:
11

Step by step explanation:
2x4=8
8+3=11
5 0
3 years ago
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