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3 years ago

Parallel to y=2x+1 Goes through (5,4)

1 answer:

6 0

      y = mx + b
      y = 2x + 1
y - y₁ = m(x - x₁)
y - 4 = 2(x - 5)
y - 4 = 2(x) - 2(5)
y - 4 = 2x - 10
+ 4     + 4
   y = 2x - 6

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Solve each equation 3x^2=80

Lapatulllka [165]

Answer:

$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

$x = \frac{\pm4\sqrt{15}}{3}$

Step-by-step explanation:

Hello!

Use the quadratic formula: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

First, let's convert our equation to standard form of a Quadratic: ax² + bx + c = 0

3x² = 80

3x² - 80 = 0

Note, thats the value of b will be 0, as there is no "bx"

Now, solve:

$x = \frac{-(0) \pm \sqrt{(0)^2 - 4(3)(-80)}}{2(3)}$ Plug in values
$x = \frac{\pm\sqrt{960}}{6}$ Simplify the radical (Discriminant)
$x = \frac{\pm8\sqrt{15}}{6}$ Pull out perfect squares
$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$ Reduce factors

The solutions are $x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

5 0

2 years ago

Simplify (-2x)^4 a.) -16x^4 b.) -8x^4 c.) -2x^4 d.) 8x^4 e.) 16x^4

kozerog [31]

answer

c.)

Step-by-step explanation:

(-2x)^4 = -2x^4

which is the same as answer c.)

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3 years ago

Is PQR = STU? if so, name which similarity postulate or theorem applies.

lutik1710 [3]

Answer:

Step-by-step explanation:

7 0

3 years ago

Can anyone help ? :(

V125BC [204]

Answer: B 65 and C 275

Step-by-step explanation:

Just divide by 3 then multiply by 5

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4 years ago

What is the value of x ?

charle [14.2K]

Answer:

x= - square root 141 or x= square root 141

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3 years ago

Read 2 more answers