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3 years ago

Which quadratic equations have two solutions? Select all that apply.

Mathematics

1 answer:

AnnZ [28]3 years ago

4 0

Sheeeeeesssshhhhhhhhh

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What math operation determines the pattern? 48, 3, 45, -42?

34kurt

Just subtract the following number from the preceding one.
48- 3= 45
3- 45= -42.

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3 years ago

20x^2-30=4x solve for x

ankoles [38]

Answer:

x=1.3288 or -1.1288

Step-by-step explanation:

Given $20x^{2}-30=4x$

Subtract 4x from both sides

$20x^{2}-4x-30=0$

Since we can factor out 2 from whole equation, let's factor out 2.

$2(10x^{2}-2x-15)=0$

Divide with 2 on both sides

$10x^{2}-2x-15=0$

We got the quadratic equation, we can solve for x using quadratic formula.

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

$x=\frac{2\pm\sqrt{2^{2}-4X10X(-15)} } {2X10}$

$x=\frac{2\pm\sqrt{604} }{20}$

$x=\frac{2\pm2\sqrt{151}}{20}$

$x=1.3288or-1.1288$

8 0

3 years ago

Read 2 more answers

A school principal wants to know more about the number of students absent each day. He counts the number of students absent each

True [87]

Answer:

6.27

Step-by-step explanation:

We are to obtain the standard deviation of the given values :

{24, 18, 31,25, 34}

The standard deviation = √(Σ(x - mean)²/ n)

The mean = (ΣX) /n

Using calculator to save computation time :

The standard deviation, s = 6.27 (2 decimal places)

6 0

3 years ago

What is the radius of this circle?

topjm [15]

The radius of the circle is 3

5 0

3 years ago

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What slope is parallel to:<br> m = 4

andreyandreev [35.5K]

Answer:

m = 4

Step-by-step explanation:

Parallel means to have the same slope but different x- and y- intercepts

An example would be y = 4x + 6 and y = 4x - 2

8 0

3 years ago

Which quadratic equations have two solutions? Select all that apply.​

Which quadratic equations have two solutions? Select all that apply.