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3 years ago

Y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?

Mathematics

2 answers:

Sergeu [11.5K]3 years ago

7 0

Hi!
x = 6 bc 7 was multipled by 3 so we would have to multiply 2 also.
Hope this helps!Brainliest?

antiseptic1488 [7]3 years ago

4 0

The answer should be 6 bc the proportion is 3.5 tell me if im wrong...

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If f(x)=x2-2x-8 and g(x)=1/4x-1 for which value of x is f(x)=g(x)

fomenos

$f(x)=x^2-2x-8;\ g(x)=\dfrac{1}{4}x-1\\\\f(x)=g(x)\iff x^2-2x-8=\dfrac{1}{4}x-1\qquad\text{multiply both sides by 4}\\\\4x^2-8x-32=x-4\qquad\text{subtract x from both sides}\\\\4x^2-9x-32=-4\qquad\text{add 4 to both sides}\\\\4x^2-9x-28=0\\\\4x^2-16x+7x-28=0\\\\4x(x-4)+7(x-4)=0\\\\(x-4)(4x+7)=0\iff x-4=0\ \vee\ 4x+7=0\\\\x=4\ \vee\ 4x=-7\\\\\boxed{x=4\ \vee\ x=-\dfrac{7}{4}}$

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3 years ago

If you solve the inequality x + 6 ≥ 9, the solution set is x ≥ 3. Graph x ≥ 3 on a number line.

soldier1979 [14.2K]

Answer:

d is the answer

Step-by-step explanation:

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2 years ago

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Which set of rational numbers is arranged from least to greatest?

Aleksandr-060686 [28]

Answer:

-0.5, negative 1 over 5, 1 over 9, 1

Step-by-step explanation:

Hope this helps! :) please mark me as brainly :)

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2 years ago

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Solve the quadratic equation 6x2 + 1 = 5x. Show your work.

Artyom0805 [142]

Answer:

<h2>Factors = (3x - 1) (2x - 1)</h2><h2>values :- x = 1/3 , 1/2</h2>

Step-by-step explanation:

= > 6x^2 + 1 = 5x

• Bring it in the standard form,

= > 6x^2 - 5x + 1 = 0

= > 6x^2 - (3 + 2)x + 1 = 0

= > 6x^2 - 3x - 2x + 1 = 0

• Take out common

= > 3x (2x - 1) - 1 (2x - 1) = 0

= > (3x - 1) (2x - 1) = 0...factors

= > x = 1/3 and 1/2... values of x

<h2>Hope it helps you!! </h2>

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2 years ago