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3 years ago

11

How do we find what x is in this problem

2 answers:

Alexxx [7]3 years ago

6 0

Set The Numbers On The Side Equal To The Equation. Use Inverse Operation And Divide Since The X Is Used In Multiplication.

kykrilka [37]3 years ago

3 0

Ok so since x is the unkown variable we would need to isolate the variable. That means do the opposite operation. So we divide 2 by 2 because thats the coefficient. Then what you do is do the same thing on the other side,divide 1 by 2 to get your answer. your answer would be x=whatever your answer is.

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The area of a rectangle is 20 square inches. If the length is 4 inches less than 6 times the width, then find the dimensions of

Tpy6a [65]

Step-by-step explanation:

Let the width=x

Length =6x-4

As we know that in a rectangle

${\boxed{\sf Area=LB}}$

Substitute the values

$\hookrightarrow\sf x (6x-4)=20$

$\hookrightarrow\sf 6x^2-4x=20$

$\hookrightarrow\sf 6x^2-4x-20=0$

Here a=6, b=-4, c=-20.
use quadratic formula

$\hookrightarrow\sf x=\dfrac {1}{3}+\dfrac {1}{3}\sqrt {31} \quad or \quad \dfrac {1}{3}+\dfrac {-1}{3}\sqrt {31}$

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3 years ago

The correct mixture of oil to gas in a weed eater is 1/2 pint of oil to 2 1/2 gallons of gas. how many pints of oil are needed f

9966 [12]

1/2 pint of oil=2 1/2 gallons of gas

X pint of oil= 10 gallons of gas

X= (10*0.5)/2.5

X= 2 pints of oil

8 0

4 years ago

Read 2 more answers

What is 0.15% of 250? in the simplest form

grin007 [14]

Answer:

0.06%%%%%%%%%%%%%%%%

6 0

3 years ago

Read 2 more answers

Completing the square: x^2+2x-7=8x

tia_tia [17]

Answer: x = 7, x = -1

Step-by-step explanation: Move the term to the left side

x^2 + 2x - 7 = 8x

x^2 + 2x - 7 - 8x = 0

Combine like terms

x^2 + 2x - 7 - 8x = 0

x^2 - 6x - 7 = 0

x^2 - 6x - 7 = 0

a = 1

b = -6

c = -7

x = -(-6) + (-6)^2 - 4 x 1(-7)/ 2 x 1

Evaulate the Exponent

Multiply the numbers

Add the numbers

Evaluate the square root

Multiply the numbers x = 6 ± 8/2

To solve for the unknown variable, separate into two equations: one with a plus and the other with a minus.

x = 6 + 8/2

x = 6 - 8/2

Rearrange and isolate the variable to find each solution

x = 7

x = -1

4 0

3 years ago

Crazy boy [7]

Correct answer : C.
But in decimal form: 6.63324958

4 0

3 years ago