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mario62 [17]
3 years ago
10

Rewrite the following quadratic functions in intercept or factored form. Show your work.

Mathematics
2 answers:
madreJ [45]3 years ago
7 0

Answer:

(x + 2)(x + 5)

Step-by-step explanation:

For factored form you have to determine what two numbers multiplied by each other equal c that also, when added to each other, equal b.

Y= ax^2 + bx + c

a=1

b=7

c=10

the factors of 10 are 1, 2, 5, 10

and 2 + 5 = 7

and in factored form with a = 1

(x + 5)(x + 7)

astraxan [27]3 years ago
6 0

<u>Answer:</u>

y = (x+5)(x+2)

<u>Step-by-step explanation:</u>

We are given the following the quadratic function and we are to rewrite it in intercept or factored form:  

y = x^2 + 7x + 10  

We can factorize the given quadratic function such that when multiplied, the factors give a product of 10 and when added, they give a result of 7.

y=x^2+5x+2x+10

y=x(x+5)+2(x+5)

y=(x+5)(x+2)

Therefore, the factored form of the given function is y = (x+5)(x+2).



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A sample of 50 cotton threads shows the mean breaking strength to be 220 grams and the sample standard deviation to be 12 grams.
xenn [34]

Answer:

220-2.01\frac{12}{\sqrt{50}}=216.589    

220+2.01\frac{12}{\sqrt{50}}=223.411    

The confidence interval for this case would be (216.589, 223.411)

Step-by-step explanation:

Information given

\bar X=220 represent the sample mean

\mu population mean

s=12 represent the sample standard deviation

n=50 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=50-1=49

The Confidence level is 0.95 or 95%, the significance is \alpha=0.05 and \alpha/2 =0.025, the critical value for this case is t_{\alpha/2}=2.01

And replacing we got:

220-2.01\frac{12}{\sqrt{50}}=216.589    

220+2.01\frac{12}{\sqrt{50}}=223.411    

The confidence interval for this case would be (216.589, 223.411)

6 0
3 years ago
PLEASE SOLVE THIS FOR ME. HELP ASAP!!!
hjlf

Answer:

m = -3

b = 4

Equation: y = -3x + 4

Step-by-step explanation:

The equation for a straight line is y = mx + b.

The line crosses the y-axis at (0,4). So, b (the y-intercept) will be 4.

Now, to find m (the slope). The next point on the line is (1,1). To get there, you go down 3 units (-3) and to the right 1 unit.

Slope is known as rise (change in x-axis) over run (change in y-axis). So, -3 ÷ 1 = -3. m will be -3.

For the equation of the line, just plug the numbers into the equation for a straight line.

y = mx + b

y = -3x + 4

Hope that helps.

4 0
3 years ago
What is the slope of line b
const2013 [10]
Can’t see the picture
8 0
3 years ago
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Divide 20 chocolates between Adi and Suresh such that adi gets 60% while Suresh gets 40% of the chocolates
Eddi Din [679]

Hello!

To find how much chocolate Adi and Suresh receives, you need to convert the percentage to a decimal, then you multiply that decimal by the total number of chocolates, which is 20.

To convert percentages to decimals, divide the percentage by 100, and remove the percentage.

60% / 100 = 0.60

20% / 100 = 0.20

Then, we multiply 0.60 and 0.20 by 20.

0.60 x 20 = 12

0.40 x 20 = 8

Therefore, Adi gets 12 chocolates and Suresh gets 8 chocolates.

6 0
3 years ago
If there is a positive correlation between number of years studying math and shoe size ​(for children), does that prove that lar
stealth61 [152]

Answer:

The hidden variable is age.

Step-by-step explanation:

That does not prove that  larger shoes cause more studying math or vice versa.

The children with larger shoes are most probably older  so they would have done  more years of studying than the younger ones.

The hidden variable is the age of the child.

8 0
3 years ago
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