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2 years ago

Need help I forgot how to do this

Mathematics

1 answer:

Marat540 [252]2 years ago

8 0

Answer:

Step-by-step explanation:

you have to find the discriminant

b²-4ac for each equation

if discriminant < 0 no real solutions because will be negative under the squareroot whhan you try to find the roots

if discriminant = 0 there is only one solution

if discriminant > 0 two real solutions

for your given problems

A. discriminant =(-2)²-4*2*15 will be negative

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Volume in barrels of a tank 38.622 feet in diameter by 16 feet in height

Gnoma [55]

3.14 * 19.311^2 = 60.63654
60.63654 * 19.311 = 1170.95222394
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<span>18744.738366545 foot^<span>3
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2 years ago

In right △ABC , the right angle is at C, m∠A=30∘ , and AC=5√ 5 units.

Makovka662 [10]

Answer:

5 $\sqrt{15}$ +5 $\sqrt{5}$

Step-by-step explanation:

The core uses the value of the Pythagorean theorem and special angles.

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2 years ago

At what value of x do the graphs of the equations below intersect?

Bogdan [553]

Answer:

Step-by-step explanation:

The intersection is the point where two equations meet. It is calculated by substituting terms into the equations involved. For the given systems of equation, calculations are as follows:

2x - y = 6

y = 2x - 6

We substitute the equation above to the second equation.

5x + 10y = –10

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Simplifying,

5x + 20x - 60 = -10

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3 0

2 years ago

Read 2 more answers

Simplify and Evaluate

zalisa [80]

$\dfrac{2^{-1} + 5^{-1}}{10^{-1} - 5^{-2}} =$

$= \dfrac{\frac{1}{2} + \frac{1}{5}}{\frac{1}{10} - \frac{1}{5^2}}$

$=\dfrac{\frac{1}{2} + \frac{1}{5}}{\frac{1}{10} - \frac{1}{25}}$

$=\dfrac{\frac{5}{10} + \frac{2}{10}}{\frac{5}{50} - \frac{2}{50}}$

$=\dfrac{\frac{7}{10}}{\frac{3}{50}}$

$= \frac{7}{10} \times \frac{50}{3}$

$= \frac{7}{1} \times \frac{5}{3}$

$= \frac{35}{3}$

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2 years ago

What part of 28 is 17?

timurjin [86]

Answer:

Step-by-step explanation:

Divide 28 by 4 to get 7

7 0

2 years ago

Need help I forgot how to do this ​

Need help I forgot how to do this