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Masja [62]
3 years ago
9

Simplify (4x − 6) + (5x + 1). 9x + 5 9x − 5 x − 5 −x − 5

Mathematics
1 answer:
azamat3 years ago
3 0

Answer:

9x - 5  

Step-by-step explanation:

<u>Simplify:</u>

  • (4x − 6) + (5x + 1) =        ⇒ opening parenthesis
  • 4x - 6 + 5x +1 =              
  • (4x+ 5x) + (1 -6) =           ⇒ grouping like terms
  • 9x + (- 5) =                     ⇒ simplifying like terms
  • 9x - 5                             ⇒ answer

<u>Correct choice:</u> B. 9x -5

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W (n) = n^2-n find w (-3)
Papessa [141]

Answer:

w(-3) = 12

Step-by-step explanation:

Plug in -3 for n in the equation:

w(n) = n^2 - n

w(-3) = (-3)^{2} - (-3)

Simplify. Remember to follow PEMDAS. First, solve the power:

w (-3) = (-3)^2 - (-3)\\w (-3) = (-3 * -3) - (-3)\\w (-3) = (9) - (-3)

Next, combine like terms. Note that if there are two negative signs directly next to each other, it becomes a positive sign. Add:

w(-3) = 9 - (-3)\\w(-3) = 9 + 3\\w(-3) = 12

Your answer: w(-3) = 12

5 0
3 years ago
Suppose a triangle has two sides of length 33 amd 37, and that the angle between these two sides is 120°. What is the length of
jeka57 [31]

Answer:

c = 60.65 cm

Step-by-step explanation:

Given that,

The two sides of a triangle are 33 cm and 37 cm.

The angle between these two sides is 120°.

We need to find the length of the third side of the triangle. Let c is the third side. Using cosine rule,

c^2=a^2+b^2-2ab\cos C

a = 33 cm, b = 37 cm and C is 120°

So,

c^2=(33)^2+(37)^2-2\times 33\times 37\cos (120)\\\\c=60.65\ cm

So, the length of the third side of the triangle is 60.65 cm.

7 0
3 years ago
The​ U.S.-based motorcycle manufacturer says that it expects to build 139,000 motorcycles this​ year, up from 126, 000 last year
german

The formula is (new-original)/original.

(139,000 - 126,000)/126,000

= 13,000/126,000

= .103

Now, convert the decimal into a percent by moving the decimal two places to the right and including the percent sign.

.103 = 10.3%

Answer: 10.3%


8 0
3 years ago
Caine
garri49 [273]

Answer:

well sorry I dont understand you

3 0
3 years ago
Given that sin∅ = 1/4, 0 &lt; ∅ &lt; π/2, what is the exact value of cos∅?
Artemon [7]

Answer:

b

Step-by-step explanation:

Using the trigonometric identity

• sin²x + cos²x = 1 , hence

cosx = ± \sqrt{1-sin^2x}

cosΦ > 0 for 0 < Φ < \frac{\pi }{2}

cosΦ = \sqrt{1-(\frac{1}{4})^2 } = \sqrt{1-\frac{1}{16} } = \sqrt{\frac{15}{16} } = \frac{\sqrt{15} }{4} → b


3 0
3 years ago
Read 2 more answers
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