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3 years ago

solve the following quadratic equation by completing the square. if you need to round to the nearest tenth. x² - 20x = -75

Mathematics

1 answer:

lesantik [10]3 years ago

5 0

The Answer should be either x=15 or x=5 I got both.

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And DVD cost $26.75 before sale tax sale tax is 7.5% what is the total of cost of DVDs

blondinia [14]

First let's convert 7.5% into a decimal by doing Beyoncé on it and move the decimal two places to the left.

$7.5\% = 0.075$

Now let's multiply the cost of the DVD by the converted percent,

$26.75 \times 0.075 = 2.00$
Now let's add the above number to the original price, remember, $2 is not exact.

$26.75 + 2.00 = 28.75$
~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

6 0

3 years ago

Convert 65L into quarts

Mrrafil [7]

Answer:

68.68

Step-by-step explanation:

for an approximate result, multiply the volume value by 1.057

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3 years ago

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Simplify-2(y+4) + 3y

Pie

Answer: y-8

Step-by-step explanation:

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3 years ago

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A triangle has an angle that measures 10°. The other two angles are in a ratio of 3:14. What

ivann1987 [24]

Step-by-step explanation:

We have to find the measures of other two angles of triangle.

$\red{\frak{Given}} \begin{cases} & \sf{The\ measure\ of\ one\ angle\ of\ traingle\ is\ {\pmb{\sf{10^{\circ}}}}.} \\ & \sf{The\ other\ two\ angles\ are\ in\ the\ ratio\ of\ {\pmb{\sf{3\ :\ 14}}}.} \end{cases}$

We know that,

The other two angles of triangle are in the ratio of 3 : 14. So, let us consider the other two angles of the triangle be 3x and 14x.

Angle sum property,

The angle sum property of triangle states that the sum of interior angles of triangle is 180°. By using this property, we'll find the other two angles of the triangle.

$\rule{200}{3}$

$\sf \dashrightarrow {10^{\circ}\ +\ 3x\ +\ 14x\ =\ 180^{\circ}} \\ \\ \\ \sf \dashrightarrow {10^{\circ}\ +\ 17x\ =\ 180^{\circ}} \\ \\ \\ \sf \dashrightarrow {17x\ =\ 180^{\circ}\ -\ 10^{\circ}} \\ \\ \\ \sf \dashrightarrow {17x\ =\ 170^{\circ}} \\ \\ \\ \sf \dashrightarrow {x\ =\ \dfrac{\cancel{170^{\circ}}}{\cancel{17}}} \\ \\ \\ \dashrightarrow {\underbrace{\boxed{\pink{\frak{x\ =\ 10^{\circ}.}}}}_{\sf \blue {\tiny{Value\ of\ x}}}}$

∴ Hence, the value of x is 10°. Now, let us find out the other two angles of the triangle.

$\rule{200}{3}$

Second AnglE :

3x
3 × 10
30°

∴ Hence, the measure of the second angle of triangle is 30°. Now, let us find out the third angle of triangle.

$\rule{200}{3}$

Third AnglE :

14x
14 × 10
140°

∴ Hence, the measure of the third angle of the triangle is 140°.

5 0

3 years ago

Solve the equation. -0.2(30) + 0.5x = 0.2(30 + x)

Travka [436]

Answer:

x=40

Step-by-step explanation:

4 0

3 years ago