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3 years ago

Select all of the following that are quadratic equations.

Mathematics

2 answers:

Nesterboy [21]3 years ago

5 0

Answer:

x^2 -2x = 4x+1

2x^2 +12x = 0

9x^2 +6x -3=0

Step-by-step explanation:

A quadratic equation has the highest power of x being squared

x^2 -2x = 4x+1

2x^2 +12x = 0

9x^2 +6x -3=0

These are all quadratic equations

avanturin [10]3 years ago

5 0

Answer:

a,d,f

Step-by-step explanation:

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Help pls!!!!! Brainliest goes to first right answer

zepelin [54]

Answer:

96 inch²

Step-by-step explanation:

there are 2 shapes,

1. a square

2. a triangle

lets find the area of the square first,

<u>AREA = SIDE × SIDE</u>

= 8 × 8

= 64 inch²

now, area of triangle ,

$area \: = \frac{1}{2} \times base \: \times height \:$

$= \frac{1}{2} \times 8 \times 8 \\ = \frac{1}{2} \times 64 \\ = 32 \: {inch}^{2}$

so, total area is :

area of square + area of triangle

= 64 + 32

= 96 inch²

7 0

3 years ago

Read 2 more answers

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd =

swat32

Answer:

Test statistic, $t_{s} = -0.603$ (to 3 dp)

Step-by-step explanation:

Deviation, d = x -y

Sample mean for the deviation

$\bar{d} = \frac{\sum x-y}{n}$

$\bar{d} = \frac{(28-6) + (31-27)+(20-26)+(25-25)+(28-29)+(27-32)+(33-33)+(35-34)}{8} \\\bar{d} = -0.625$

Standard deviation: $SD = \sqrt{\frac{\sum d^{2} - n \bar{d}^2}{n-1} }$

$\sum d^{2} = (28-26)^2 + (31-27)^2 +(20-26)^2 +(25-25)^2 +(28-29)^2 +(27-32)^2 +(33-33)^2 +(35-34)^2\\\sum d^{2} = 63$

$SD = \sqrt{\frac{63 - 8 * (-0.625)^2}{8-1} }$

SD =2.93

Under the null hypothesis, the formula for the test statistics will be given by:

$t_{s} = \frac{ \bar{d}}{s_{d}/\sqrt{n} } \\t_{s} = \frac{- 0.625}{2.93/\sqrt{8} }$

$t_{s} = -0.6033$

6 0

3 years ago

What’s the fraction of 65% in its simplest form

patriot [66]

Answer:

13/20

Step-by-step explanation:

65%=65/100

65/100=13/20

5 0

3 years ago

Read 2 more answers

LF U DO THIS ILL GIVE BRAINLIEST AND MAKE A SPECIAL QUESTION WITH ALL MY POINTS THANKS SO MUCH

erma4kov [3.2K]

Answer:

that table is for you can put some question crime then you need to find the clime and then you need to think how that pass and then you can put any evidence like a gun or a shirt like a evidence and the you will tell how that pass like he go in the house and then he have a gun and then he kill something like that

Step-by-step explanation:

3 0

2 years ago

Order from least to greatest:<br> -0.33, 0.25,-1/2,-0.17

TEA [102]

Answer:

-0.33,-0.17,-1/2,0.25

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Select all of the following that are quadratic equations.​

Select all of the following that are quadratic equations.