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dem82 [27]
3 years ago
6

Select all of the following that are quadratic equations.

Mathematics
1 answer:
deff fn [24]3 years ago
7 0
What you want to do is solve all of these so that it equals to 0 on one side. The ones that are a quadratic will have x^2

x^2 - 2x = 4x + 1
x^2 - 6x - 1 = 0
Yes this is a quadratic

x^3 - 6x^2 + 8 = 0
No this is not a quadratic because the highest power of x is to the power of 3

5x - 3 = 0
No it is not a quadratic because it does not have x^2

2x^2 + 12x = 0
Yes because there's x^2

5x - 1 = 3x + 8
2x - 9 = 0
No because no x^2

9x^2 + 6x - 3 = 0
Yes because there's x^2
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Plss help me and explaim too​
masya89 [10]

Answer:

a = b = 1

Step-by-step explanation:

The triangles are similar thus ratios of corresponding sides are equal, that is

\frac{10}{2} = \frac{5}{b} ( cross- multiply )

10b = 10 ( divide both sides by 10 )

b = 1

and

\frac{10}{2} = \frac{5}{a} ( cross- multiply )

10a = 10 ( divide both sides by 10 )

a = 1

Thus a = 1 and b = 1

3 0
2 years ago
Find y given that x = –4: y = –4x – 6
AlladinOne [14]

Answer:

y=10

Step-by-step explanation:

Substitute -4 in place of x

y = -4*-4-6

y=10

7 0
3 years ago
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ryzh [129]
He earns $509 a week. Work: 
4581 divided by 9 $509
Robin earns $509 per week.
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Heyyy, please answer :]
Yuliya22 [10]
The solution is “no real solution”
Because the slope is the same, so they are parallel.

Hope that help!! :-)
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A ceiling fan manufacturer claims that 89% of homes in the South have ceiling fans. A random sample of 100 Southern homes was su
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The answer is

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