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pav-90 [236]
3 years ago
8

A train travels 616 miles at a speed of 55 miles per hour. Use the equation d equals r t to find the time the train travels.

Mathematics
1 answer:
MatroZZZ [7]3 years ago
5 0

Answer:

t=11.2

Step-by-step explanation:

d=rt

616=55*t

t=11.2

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(X^2 +4) +32=12x^2+48
s2008m [1.1K]
Let's solve your equation step-by-step.

<span><span><span><span>x2</span>+4</span>+32</span>=<span><span>12<span>x2</span></span>+48

</span></span>Step 1: Simplify both sides of the equation.


<span><span><span>x2</span>+36</span>=<span><span>12<span>x2</span></span>+48

</span></span>Step 2: Subtract 12x^2+48 from both sides.

<span><span><span><span>x2</span>+36</span>−<span>(<span><span>12<span>x2</span></span>+48</span>)</span></span>=<span><span><span>12<span>x2</span></span>+48</span>−<span>(<span><span>12<span>x2</span></span>+48</span>)

</span></span></span><span><span><span>−<span>11<span>x2</span></span></span>−12</span>=0

</span>Step 3: Use quadratic formula with a=-11, b=0, c=-12.

<span>x=<span><span><span>−b</span>±<span>√<span><span>b2</span>−<span><span>4a</span>c</span></span></span></span><span>2a

</span></span></span><span>x=<span><span><span>−<span>(0)</span></span>±<span>√<span><span><span>(0)</span>2</span>−<span><span>4<span>(<span>−11</span>)</span></span><span>(<span>−12</span>)</span></span></span></span></span><span>2<span>(<span>−11</span>)

</span></span></span></span><span>x=<span><span>0±<span>√<span>−528</span></span></span><span>−<span>22

Hopefully this helps!
</span></span></span></span>
4 0
3 years ago
Nadir saves $1 the first day of a month, $2 the second day, $4 the third day, and so on. He continues to double his savings each
zlopas [31]

Answer:

$16,384

Step-by-step explanation:

The amount of money Nadir saves increases exponentially by a factor of 2. If you keep multiplying each previous number by 2 until you get to the 15th number, (2*2, 4*2, 8*2, 16*2), you will get 16,384.

4 0
4 years ago
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Use the point and the slope to graph each line. Write the equation of the line. The line contains point (2,-2) and is perpendicu
lisabon 2012 [21]

Answer:

x + y = 0

Step-by-step explanation:

Slope 1

b = -2 - (-1)(2)

b = -2 +2

b = 0

y = -x

4 0
3 years ago
Cos^2(2theta)+ 2cos(2theta)+1=0
Tema [17]

Answer:

θ = π n + π/2 for n element Z

Step-by-step explanation:

Solve for θ:

1 + 2 cos(2 θ) + cos^2(2 θ) = 0

Write the left hand side as a square:

(cos(2 θ) + 1)^2 = 0

Take the square root of both sides:

cos(2 θ) + 1 = 0

Subtract 1 from both sides:

cos(2 θ) = -1

Take the inverse cosine of both sides:

2 θ = 2 π n + π for n element Z

Divide both sides by 2:

Answer:  θ = π n + π/2 for n element Z

4 0
3 years ago
Help this is harder than life itself
allsm [11]

Answer:

12

Step-by-step explanation:

6 0
3 years ago
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