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Alik [6]
3 years ago
13

If the discriminate of a quadriatic equation is 4, how many solutions does the equation have?

Mathematics
1 answer:
Tanya [424]3 years ago
5 0

Answer:

two solutions

Step-by-step explanation:

If you have a discriminant value greater than zero (not zero and not negative), you're gonna have two solutions. For zero discriminant, one solution. For negative discriminant, no solutions at all.

Make sure you remember this. It will save you from solving a quadratic equation which has no solutions.

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Convert the following into metres.<br> A- 22cm<br> B- 180km<br> C-300mm
Alecsey [184]

<em>A) 22cm</em>

<em>(</em><em> </em><em>divide the length value by 100</em><em>)</em>

<em>2</em><em>2</em><em>/</em><em>1</em><em>0</em><em>0</em><em> </em><em>which</em><em> </em><em>gives</em><em> </em><em>you</em><em>:</em>

<em><u>=</u></em><em><u>0.22m</u></em>

<em>B</em><em>)</em><em> </em><em>180km</em>

<em>(</em><em> </em><em>multiply the length value by </em><em>1000</em><em>)</em>

<em>1</em><em>8</em><em>0</em><em>×</em><em>+</em><em>1</em><em>0</em><em>0</em><em> </em><em>which</em><em> </em><em>gives</em><em> </em><em>you</em><em>:</em>

<em><u>=</u></em><em><u>180000m</u></em>

<em>C</em><em>)</em><em> </em><em>300mm</em>

<em>(</em><em> </em><em>divide the length value by 1000</em><em>)</em>

<em>3</em><em>0</em><em>0</em><em>/</em><em>1</em><em>0</em><em>0</em><em>0</em><em> </em><em>which</em><em> </em><em>gives</em><em> </em><em>you</em><em>:</em>

<em><u>=</u></em><em><u>0.3m</u></em>

<em> </em>

4 0
1 year ago
Read 2 more answers
What value of x is in the solution set of -2(3x + 2) &gt; -8x + 6?
n200080 [17]

Answer:

x > 5

Step-by-step explanation:

Given that:

= -2(3x + 2) > -8x + 6

 (negative sign before bracket will alter the internal signs when multiplied by each term)

= -6x - 4 > -8x +6

Taking x terms on left side and other constants on right side

= -6x + 8x > 6 +4

Signs will be changer for transferred terms

= 2x > 10

By Dividing both sides 2 we get

=x > 10/2

= x >5

5 0
2 years ago
Eliana drove her car 81 km and used 9 liters of fuel. She wants to know how many kilometers (x) she can drive on 22 liters of fu
LenaWriter [7]

Answer:

I don't know

Step-by-step explanation:

thanks for the pints

6 0
3 years ago
Read 2 more answers
solve The mean score of a competency test is 60, with a standard deviation of 5. Between what two values do about 68% of the val
Anna11 [10]

Answer:

Between 55 and 65

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 60

Standard deviation = 5

Between what two values do about 68% of the values lie?

By the Empirical Rule, within 1 one standard deviation of the mean. So from 60-5 = 55 to 60+5 = 75.

5 0
3 years ago
A line that includes the point (1, 3) has a slope of -7. What is its equation in slope-intercept
Alex787 [66]

Answer:

y = -7x + 10

Step-by-step explanation:

Using a point slope form equation

y - y1 = m( x - x1)

Given

Point = ( 1 , 3)

Slope = -7

Insert the values into

y - y1 = m(x - x1)

x1 = 1

y1 = 3

y - 3 = m( x - 1)

m = -7

y - 3 = -7(x - 1)

Using a slope intercept form equation

y = mx + c

Open the bracket

y - 3 = -7x + 7

y = -7x + 7 + 3

y = -7x + 10

The equation of the line is

y = -7x + 10

6 0
3 years ago
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