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Vitek1552 [10]
3 years ago
12

5x² + 4x - 20 = 0 Solve this using the quadratic formula

Mathematics
1 answer:
Natali [406]3 years ago
8 0

Here's the answer, using the quadratic formula

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Jennifer and Joshua meet for dinner at a restaurant. After dinner, Joshua drives 15 miles south while Jennifer drives 12 miles w
Natasha_Volkova [10]

Answer:

19.209 miles from each other.

Step-by-step explanation:

{a}^{2}  +  {b}^{2}  =  {c}^{2}

Using this we get:

{15}^{2}  +  {12}^{2}  =  {x}^{2}

225 + 144 = 369 =  {x}^{2}

\sqrt{369 }  = 19.209

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There isn't a b variable in this equation, but x = 2.5. (:

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Use the diagram to answer the question.<br><br><br><br>Angle ACB and angle ECD are _______ angles.
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Step-by-step explanation:

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Step-by-step explanation:

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Read 2 more answers
47. A car travels at a constant speed of 50 miles per hour.
SIZIF [17.4K]

Answer:

The inverse of the given function is $t(d)=\frac{d}{50}$. The time taken to travel 180 miles is 3.6 hours.

Step-by-step explanation:

It is given that a car travels at a constant speed of 50 miles per hour. A function for distance traveled is also given as d(t)=50t.

It is required to find the inverse of the function by expressing the time travel in terms of distance traveled and also find t(180).

To find the inverse, express time traveled in terms of distance traveled using normal algebraic methods and then substitute 180 for t and explain its results.

Step 1 of 2

The given function is d(t)=50t.

Consider d(t) as d and t as t(d) and rewrite the equation.

The rewritten function is d=50 t(d)

Divide by 50 on both sides of the equation.

$$\begin{aligned}&d=50 t(d) \\&\frac{d}{50}=\frac{50 t(d)}{50} \\&t(d)=\frac{d}{50}\end{aligned}$$

Step 2 of 2

Substitute 180 for $t$ in the simplified expression and interpret the results.

$$\begin{aligned}&t(d)=\frac{d}{50} \\&t(d)=\frac{180}{50} \\&t(d)=3.6\end{aligned}$$

The time taken to travel 180 miles is 3.6 hours.

3 0
2 years ago
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