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2 years ago

11

Solve for x. A) -7 C) 6 B) 9 D) 10

2 answers:

Usimov [2.4K]2 years ago

6 0

The answer for this is A -7

Mekhanik [1.2K]2 years ago

5 0

Answer:

A

Step-by-step explanation:

The segment BC joining the midpoints of 2 sides of the triangle is

Half the length of the third side, that is

x + 31 = 2(x + 19)

x + 31 = 2x + 38 ( subtract x from both sides )

31 = x + 38 ( subtract 38 from both sides )

- 7 = x → A

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Please help!! Will mark first answerer brainiest!! Thank you so much!!

geniusboy [140]

C. Is the answer to this question

8 0

3 years ago

A cuboid with a volume of 924cm^3 has dimensions 4cm, (x+1)cm and (x+11). Show clearly that x^2+12x-220=0 solve the equation by

garik1379 [7]

Answer:

$x^2+12x-220=0$ -- Proved

$x = 10\ \ \ x = -22$

Step-by-step explanation:

Given

$Volume = 924cm^3$

$Dimension: 4cm; (x+1)cm; (x+11)cm$

Required

Show that $x^2+12x-220=0$

The volume is calculated as:

$4 * (x + 1) * (x + 11) = 924$

Open the brackets

$(4x + 4) * (x + 11) = 924$

$4x^2 + 44x + 4x + 44 = 924$

$4x^2 + 48x+ 44 = 924$

Collect Like Terms

$4x^2 + 48x+ 44 - 924=0$

$4x^2 + 48x -880=0$

Divide through by 4

$\frac{4x^2}{4} + \frac{48x}{4} -\frac{880}{4}=0$

$x^2+12x-220=0$

Solving further:

Expand the expression

$x^2 + 22x - 10x - 220 = 0$

Factorize:

$x(x + 22) - 10(x + 22) = 0$

$(x - 10)(x + 22) = 0$

Split:

$x - 10 = 0;\ \ \ x + 22 = 0$

$x = 10\ \ \ x = -22$

5 0

2 years ago

What is 760 hundreds

astraxan [27]

76,000. 760x100=76,000

3 0

3 years ago

ITS URGENT PLEASE HELP ME

Iteru [2.4K]

I think that it is D or A

3 0

2 years ago

State the domain and range for the function. f(x)=3cot(2x)

kozerog [31]

Please see attached image for the answer
Range: all real numbers

7 0

3 years ago