All categories

3 years ago

What is the simplified version of... 6x+3x-7+9-2x

Mathematics

2 answers:

IRISSAK [1]3 years ago

8 0

Answer:

7x+2

Step-by-step explanation:

myrzilka [38]3 years ago

8 0

Answer:

7x+2

Step-by-step explanation:

6x+3x+2-2x= 7x+2

You might be interested in

Which of the following polynomial is a quadratic polynomial: (i)x²-7x+2 (ii) 7x²-x(x+2) (iii) 2x (x+5)+1 (iv) 2x-1

SSSSS [86.1K]

Answer:

(iii)2x (x+5)+1 I guessss.....

8 0

3 years ago

WILL GIVE BRAINLIEST

galina1969 [7]

Answer:

x= 3 inches

Step-by-step explanation:

-The volume of a box is given by the formula:

$V=lwh\\\\l-length\\w-width\\h-height$

-We are given the dimensions h=x+2, l=2x+5 and w=4x-1.

We substitute this values in the formula and equate to the volume value.

$V=lwh\\\\605=(x+2)(2x+5)(4x-1)\\\\605=8x^3+34x^2+31x-10$

#We take the values to the same side and equate to zero;

$8x^3+34x^2+31x-615=0\\\\\\\#Factor\\\\\\(x-3)(8x^2+58x+205)=0$

#Applying the zero factor principal to obtain the different values of x:

$(x-3)=0\\\\\therefore x=3\ \ \ \ \ \ ...i\\\\(8x^2+58x+205)=0$

#We use the quadratic formula to solve the two other values of x:

$(8x^2+58x+205)=0\\x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\=\frac{-58\pm\sqrt{58^2-4\times 8\times 205}}{2\times 8}\\\\x=-3.625+3.533i \ and \ x=-3.625-3.533i$

The two other values are negatives. Ignore them since length cannot be a negative.

The only reasonable value of x is x=3

#We substitute in the formula to validate:

$V=lwh\\\\=(x+2)(2x+5)(4x-1)\\\\=(3+2)(2*3+5)(4*3-1)\\\\=605$

Hence, the value of x is 3 inches

7 0

3 years ago

Please help me with this

mel-nik [20]

Attic Floor: 8 m x 10 m = 80 m²

Roof: 3.5 m x 5 m x 10 m = 175 m²

You need 255 square meters (m²) of wood to build the roof and floor of the attic. I hope this helps, have a good night.

:)

6 0

3 years ago

A direct variation function contains the points (-9, -3) and (-12,4). Which equation represents the function?

Triss [41]

Answer:

$y = -\frac{7x}{3} - 24$