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3 years ago

About travel 27 miles in two hours at this rate how many miles will the boat travel in 1/2 hour

1 answer:

4 0

6.75 miles. If you use a proportion, you can solve it like this:

27     x
---    ---
2     0.5

27x0.5 is 13.5
13.5/2 is 6.75

So... x=6.75

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Step-by-step explanation:

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3 years ago

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2 years ago

Use the quadratic formula to solve the equation.

Sergeeva-Olga [200]

ANSWER

$x = \frac{ 5 - \sqrt{ 5} }{4} \: or \: \: x = \frac{ 5 + \sqrt{ 5} }{4}$

EXPLANATION

The given quadratic equation is

$4 {x}^{2} - 10x + 5 = 0$

We compare this to

$a {x}^{2} + bx + c = 0$

to get a=4, b=-10, and c=5.

The quadratic formula is given by

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a}$

We substitute these values into the formula to get:

$x = \frac{ - - 10 \pm \sqrt{ {( - 10)}^{2} - 4(4)(5)} }{2(4)}$

This implies that

$x = \frac{ 10 \pm \sqrt{ 100 - 80} }{8}$

$x = \frac{ 10 \pm \sqrt{ 20} }{8}$

$x = \frac{ 10 \pm2 \sqrt{ 5} }{8}$

$x = \frac{ 5 \pm \sqrt{ 5} }{4}$

The solutions are:

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3 years ago

Read 2 more answers

5x+2= pls I need help

kobusy [5.1K]

If 5x+2 equals 0 and u are solving for x,

5x+2=0
5x=-2
X=-2/5

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3 years ago