3x+6 x 4x-1 step by step

Mathematics

2 answers:

Fudgin [204]4 years ago

6 0

write question correctly

postnew [5]4 years ago

3 0

Hey there!

<h2>ANSWER: $27x-1$ </h2><h2>EXPLANATION:</h2>

$3x+6*4x-1$

Let's add parenthesis to 6 and 4 and remove the multiplication sign.

$3x+(6)(4)x-1$

This equals:

$3x+24x+-1$

Now we have to combine the like terms.

$3x+24x+-1$

Separate with parenthesis.

$(3x+24x)+(-1)\\Equals\\27x+-1(ANSWER)$

$-TestedHyperr$

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A batter strikes a baseball. the equation y = -0.005^2 +0.7x + 3.5 models its path, where x is the horizontal distance, in feet,

hram777 [196]

Answer:

(D)144.8 feet

Step-by-step explanation:

Given the equation which models the path of the baseball

$y = -0.005x^2 +0.7x + 3.5$

where x is the horizontal distance, in feet, the ball travels and y is the height, in feet, of the ball.

To determine how far from the batter the ball will land, we determine the distance x at which the height, y=0.

$y = -0.005x^2 +0.7x + 3.5=0$

$-0.005x^2 +0.7x + 3.5=0$

We use the quadratic formula to solve.

In the quadratic equation above, a=-0.005, b=0.7, c=3.5

$x=\dfrac{-b\pm\sqrt{b^2-4ac} }{2a} \\=\dfrac{-0.7\pm\sqrt{0.7^2-4(-0.005*3.5)} }{2*-0.005} \\=\dfrac{-0.7\pm\sqrt{0.49+0.07} }{-0.01}\\=\dfrac{-0.7\pm\sqrt{0.56} }{-0.01}\\x=\dfrac{-0.7+\sqrt{0.56} }{-0.01} \: or\: x=\dfrac{-0.7-\sqrt{0.56} }{-0.01}\\x=-4.83 \: or\: x=144.83$