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trapecia [35]
3 years ago
10

If

Mathematics
1 answer:
Greeley [361]3 years ago
4 0

Answer:i dont know

Step-by-step explanation:

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Add _____ to each side x2 – 8x = 9 to complete the square.
zhuklara [117]

Answer:

The correct answer is 25

Step-by-step explanation:

It is given a quadratic equation,

x² – 8x = 9

<u>To find the number to be added</u>

The given equation be  x² – 8x = 9

here we have to add (b/2)² -  the square of half the coefficient of x,

Here b = -8

(b/2)² = (-8/2)² = -4² = 16

Add both side with 16

x² – 8x + 16  = 9 + 16

(x - 4)² = 25

(x - 4)² = 5²

3 0
3 years ago
Read 2 more answers
Solve five and four tenths times two.
Mama L [17]

Answer:

it should b. Hope this helps!

8 0
3 years ago
Write a linear equation in standard form for the line that goes through (4,4)and (8,3)
Alexus [3.1K]

The standard equation of a line has the form:

y=mx+b

Where m is the slope of the line and b is the intercept.

The only thing we need to determine the equation of a line is two points, in this case, we have the points (4,4) and (8,3). Then, from the first point we know that when x equals 4 y equals 4 and from the second point we know that when x equals 8 y equals 3, we can express this with the standard formula of a line, like this:

4=m*4+b and 3=8*m+b

subtraction the second expression from the second one, we get:

4-3=m*4+b-8*m-b, we can cancel b and then we have:

4-3=m*4-m*8, we can subtract 3 from 4 in the left side and 8*m from 4*m from the right side and then:

1= -4*m , we can divide both sides by -4 and then:

m= -1/4

Now that we know the value of the slope, we only need to specify the value of b, we can do this by replacing the value of m in the expression 4=m*4+b of the first point and then solve for b, like this;

4=m*4+b, m=-1/4, then:

4= 4*(-1/4)+b, then:

4= -1+b, then, adding -1 in both sides we have:

4+1=b, then:

b=5

And the standar form of the line would be:

y=(-1/4)*x+5

5 0
1 year ago
Which function models the data in the table?
mash [69]

Answer:

(A) f(x) = 2 * 4^{t}

Step-by-step explanation:

[] We can find our answer by plugging the x values into the functions as t and solving.

-. Using this method, starting with the A function, we find that the first function models the data and we do not need to test the others. I still have shown the work for the others as it is good to check your work.

[✓] f(x) = 2 * 4^{t}

(1, 8) }{}{}{ f(x) = 2 * 4^{1} = 2 * 4 = 8

(2, 32) }{}{}{ f(x) = 2 * 4^{2} = 2 * 16 = 32

(3, 128) }{}{}{ f(x) = 2 * 4^{3} = 2 * 64 = 128

-> This pattern continues

[✗] f(x) =  4^{t}

(1, 8) }{}{}{ f(x) = 4^{1}  = 4 ≠ 8

-> This function does not model the data as it does not fulfil the first point

[✗]  f(x) = 4 * 2^{t}

(1, 8) }{}{}{ f(x) =  4 * 2^{1} = 4 * 2 = 8

(2, 32) }{}{}{ f(x) =  4 * 2^{2} = 4 * 4 = 16 ≠ 32

-> This function only models (1, 8) but does not fully model the data

[✗] f(x) =  8^{t}

(1, 8) }{}{}{ f(x) =  8^{1} = 8

(2, 32) }{}{}{ f(x) =    8^{2} = 64 ≠ 32

-> This function only models (1, 8) but does not fully model the data

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

6 0
2 years ago
In an interview for a secretary position at the dealer, a typist claims a tying speed of 45 words per minute. On
MAXImum [283]

Using the hypothesis test for one sample mean, There is NO SIGNIFICANT EVIDENCE to support the typist's claim

H_{0} = 45\\H_{1} < 45\\\\

The test statistic :

T = (x - μ) ÷ (s/√(n))

T = (43 - 45) ÷ (15/√70)

T = - 2 ÷ 1.7928429

T = -1.1155

At α = 0.05

Pvalue :

Degree of freedom, df = 70 - 1 = 69

Pvalue = 0.134

Decison region :

Reject H_{0} if Pvalue < α

Since Pvalue > α We fail to reject the Null

Learn more : brainly.com/question/20262540

8 0
3 years ago
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