All categories

4 years ago

I need help On these 8 questions that are blank

Mathematics

1 answer:

Ostrovityanka [42]4 years ago

7 0

Answer:

X = 5

Step-by-step explanation:

3x + 12 + 9x = 72

okay hopefully i can explain so when your doing this combine like terms so

3x + 9x = 12x

12x + 12 = 72

then you would subtract both sides by 12

+12 = subtract x+12=2

- 12 = add x-12=2

there just flipped so in this case i would subtract 12

12x + ( 12-12) = ( 72-12 )

so 12-12 = 0 and 72-12 is equal to 60

12x = 60

the divide on both sides l but leave the x alone so its just 60 divided by 12 wich is 5

so X = 5

hope this helps with ur homework a little btw go back and redo ur other awnsers with this new concept hope it helps

You might be interested in

Show all work to solve the equation for x. If a solution is extraneous, be sure to identify it. Square root of the quantity x +

creativ13 [48]

Answer:

x = 2 is the solution of the given equation

Step-by-step explanation:

Step(i):-

Given equation

$\sqrt{x+6-4} = x$

squaring on both sides , we get

$(\sqrt{x+2})^{2} = x^{2}$

⇒ x + 2 = x²

⇒x² - x -2 =0

Step(ii):-

Given x² - x -2 =0

⇒ x² - 2x + x - 2 =0

⇒ x ( x-2) + 1(x - 2) =0

⇒ (x + 1) ( x-2) =0

⇒ x = -1 and x =2

x = 2 is the solution of the given equation

Verification:-

$\sqrt{x+6-4} = x$

Put x= 2

$\sqrt{2+6-4} = 2$

$\sqrt{4} = 2$

2 = 2

6 0

4 years ago

Please help me i really need it.

stira [4]

To graph use your graphing calculator and plug in the function to y = and graph it

4 0

3 years ago

Extra points and mark brainlist need help urgently

solniwko [45]

Answer:

3.5 and -3.5

Step-by-step explanation:

-3.5 in absolute value is 3.5

any negative number in I I will be positive.

7 0

3 years ago

Hi can anyone tell me answer for b

MrRissso [65]

Answer:

R:D, B:S, B:C, R:H

Step-by-step explanation:

Hope this helps

5 0

3 years ago

Find the volume of the solid. When appropriate, use π=3.14 and round your answer to the nearest hundredth.

Elenna [48]

Answer:

3179.25

Step-by-step explanation:

Hello!

To find the volume of a cylinder we use the equation

$V = \pi r^{2} h$

V is volume

r is radius

h is height

Put in what we know. It is says to use pi as 3.14

$V = 3.14 * 7.5^{2} *18$

Solve

V = 3.14 * 56.25 * 18

V = 3179.25

Hope this Helps!

5 0

4 years ago