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LenaWriter [7]
3 years ago
14

Solve the equation. Simplify your answer if possible.((x+2)/5)+((x+1)/3)=((x-3)/10)-2​

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

The solved given equation

(\frac{x+2}{5})+(\frac{x+1}{3})=(\frac{x-3}{10})-2  is x=-7

Step-by-step explanation:

Given equation is (\frac{x+2}{5})+(\frac{x+1}{3})=(\frac{x-3}{10})-2

To solve the given equation as below :

(\frac{x+2}{5})+(\frac{x+1}{3})=(\frac{x-3}{10})-2 ( by using the distributive property )

\frac{3x+6+5x+5}{15}=\frac{x-3-20}{10} ( adding the like terms )

\frac{8x+11}{15}=\frac{x-23}{10}

Multiply into (10(15) on both sides we get

\frac{8x+11}{15}\times (10)(15)=\frac{x-23}{10}\times (10)(15)

(8x+11)\times (10)=(x-23)\times (15) ( by using the distributive property )

80x+110-15x+345=0 ( adding the like terms )

65x+455=0

65x=-455

x=-\frac{455}{65}

Therefore x=-7

Therefore the solved given equation is x=-7

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9 cm
OLEGan [10]

Answer:

∴ ∠BAD = sin^{-1}(0.2044) = 11.8°

Step-by-step explanation:

i) AD = 9 cm

ii) DC = 3 cm

iii) ∠BCD = 35°

iv) Since AB is parallel to DC and ∠ABD = 90°  then we can conclude that ∠BDC = 90°.

v) \frac{BD}{DC}  =  \frac{BD}{3\hspace{0.1cm}cm}  = tan(35) = 0.6128      ∴ BD  = 3 \times 0.6128 = 1.84 cm

vi) ∴ sin(∠ BAD ) = \frac{BD}{AD}      ⇒     sin(∠ BAD ) = \frac{1.84}{9} = 0.2044

     ∴ ∠BAD = sin^{-1}(0.2044) = 11.8°

7 0
4 years ago
IF YOU HELP WILL MAKE BRAINLYIST!!!!!!!!
meriva

Answer:

In geometry, a polygon is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain or polygonal circuit. The solid plane region, the bounding circuit, or the two together, may be called a polygon.

The segments of a polygonal circuit are called its edges or sides, and the points where two edges meet are the polygon's vertices(singular: vertex) or corners.

So, if a shape has points where two edges meet, it is indeed a polygon. Some examples include: Equilateral Triangles, Squares, Regular Pentagons, Regular Hexagons, Regular Heptagons, and Regular Octagons.

3 0
4 years ago
Read 2 more answers
What is an equation of the line that passes through the point (-5 7) and is parallel to the line x-5y=15
mafiozo [28]

Answer:

Step-by-step explanation:

Parallel lines have same slope.

y = mx + b

Slope = m  & y-intercept = b

x - 5y = 15

   -5y = -x + 15

      y = \frac{-1}{-5}x + \frac{15}{-5}\\\\

y = \frac{1}{5}x - 3

so, slope = 1/5   ; (-5 , 7)

y -y1 = m(x -x1)

y - 7 = \frac{1}{5}(x- [-5])\\\\y - 7 =\frac{1}{5}(x + 5)\\\\y - 7 = \frac{1}{5}x+5*\frac{1}{5}\\\\y - 7 =\frac{1}{5}x+1\\\\y =\frac{1}{5}x+1+7\\\\y=\frac{1}{5}x + 8

5 0
3 years ago
How do we know that the derivative of 1/x is equal to -1/x^2 ?
snow_lady [41]

Answer:the derivative of 1/x =-1/x^2

Step-by-step explanation:

1/x can also be written as x^-1

Therefore d/dx of x^-1

=-1*x^-1-1

=-1x^-2

Which can also be written as -1/x^2

Note: d/dx also means derivative of x

And d/dx (a/x^b) =(a*-b) /x^(b+1)

Where a and b represents a variable

4 0
3 years ago
I need help on this. please show your work.
ehidna [41]
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angle A is across from the smallest side, 2.4.
angle C is across from the middle side, 3.2
angle B is across from the longest side, 5.5

if you think about it, angle B has to be widest angle for it to accommodate the longest length (longer it is, the more you have to open). anlge A has to be the smallest angle for it to correspond with the smallest length

The order of smallest to largest is ∠A, ∠C, ∠B
8 0
4 years ago
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