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quester [9]
3 years ago
11

Simplify the algebraic expression: 4(3x + y) – 2(x – 5y)

Mathematics
2 answers:
professor190 [17]3 years ago
6 0

Answer: 10x+14y

Step-by-step explanation:

vfiekz [6]3 years ago
4 0

4*3x =12x

4*y =4y

Result:12+4y

2*x =2x

2*-5y=-10y

Result:2x+-10y

Final result:(12x+4y)+(2x+-10y)

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In ΔKLM, l = 570 cm, k = 490 cm and ∠K=46°. Find all possible values of ∠L, to the nearest degree.
Katen [24]

Step-by-step explanation:

In ΔKLM, l = 570 cm, k = 490 cm and ∠K=46°. Find all possible values of ∠L, to the nearest degree.

K

L

M

k = 490

l = 570

46°

?°

\frac{\sin A}{a}=\frac{\sin B}{b}

a

sinA

​  

=  

b

sinB

​  

 

From the reference sheet (reciprocal version).

\frac{\sin L}{570}=\frac{\sin 46}{490}

570

sinL

​  

=  

490

sin46

​  

 

Plug in values.

\sin L=\frac{570\sin 46}{490}\approx 0.836783

sinL=  

490

570sin46

​  

≈0.836783

Evaluate.

L=\sin^{-1}(0.836783)\approx 56.8\approx 57^{\circ}

L=sin  

−1

(0.836783)≈56.8≈57  

∘

 

Inverse sine and round.

\text{Quadrant II: } 180-57=123^{\circ}

Quadrant II: 180−57=123  

∘

 

Sine is positive in quadrants 1 and 2.

\text{Check for possibility:}

Check for possibility:

No triangle's angles may add to more than 180.

46+57=103

46+57=103  

∘

←Possible

Less than 180.

46+123=169}

46+123=169  

∘

←Possible

Less than 180.

 

Answer: 57  

 and 123  

5 0
3 years ago
Divide (-2x-3+8x^2) by (1 + 4x)
Strike441 [17]

Answer:

8x^2-2x-3/1+4x

Step-by-step explanation:

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3 years ago
Help I mark brainliest
Serga [27]

Answer:

-\frac{1}{5} t^{15}

Step-by-step explanation:

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3 0
3 years ago
Find the midpoint of side EF.
Fiesta28 [93]
The answer is (-0.5,4.5)
4 0
3 years ago
Read 2 more answers
Adonis created a rectangular play area for his dog in his backyard. The length of the long side was 10ft and the length of the s
Drupady [299]

Answer:

The perimeter of the dog's play area is 30 ft

Step-by-step explanation:

Rectangle:

  • The opposite sides are congruent.
  • The opposite angles are congruent.
  • The sum of all four angles of a rectangle is 360°.
  • The sum of two adjacent angles of a rectangle is 180°.
  • The diagonals bisect each other.
  • The perimeter of a rectangle is = 2(Length+width)
  • The area of a rectangle is = Length × width

Given that,

The length of the long side of the dog's play area was = 10 ft.

So, Length of dog's play area is = 10 ft.

The length of the short side of the dog's play area was = 5 ft.

So, width of dog's play area is = 5 ft.

It is a rectangular plot.

So, the perimeter of the dog's play area is =2(Length+width)

                                                                      =2(10+5) ft

                                                                      =2(15) ft

                                                                      =30 ft

5 0
3 years ago
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