Which one of the following values of k makes the trinomial 9x^2 + kx + 64 a perfect square

a 24
b 48
c 16
d 42

Answers

Answer 1

Answer:

it is C 16

Step-by-step explanation:

x² - kx + 64

Since we are looking for a perfect square, then we need to take the square root of 64 to find the factors: √64 = 8

So, the factors are: (x - 8)(x - 8)

 Foil (or distribute) to get: x² - 16x + 64 The k-value is 16


Related Questions

Can someone send me proxys that aren't blocked by iboss
and how do I removed chrome extensions that were added by a chrome administrator
I'm tryin to play fort night on geforce now browser but its blocked

Answers

Answer:

unblock miniproxy.com

Step-by-step explanation:

What is the solution to the equation −p−13=−43p+23(5p−6)?

Answers

Answer:

p = 125/73

Step-by-step explanation:

−p − 13 = −43p + 23 (5p − 6)

−p − 13 = −43p + 115p − 138

−p − 13 = 72p − 138

+p            +p

-----------------------------

-13 = 73p - 138

+138         +138

-----------------------------

125 = 73p

/73     /73

-----------------------------

125/73 = p

If you need the answer in mixed fraction, then it's --> p = 1 52/73

The solution to the given equation is p = - 1.71

To determine the solution of the given equation,

We will find the value of the variable, p, that satisfies the equation.

From the question, the given equation is

[tex]-p-13 = -43p+23(5p-6)[/tex]

To solve this,

First, Clear the brackets

[tex]-p-13 = -43p + 115p - 138[/tex]

Now, Collect like terms

[tex]-p +43p -115p = -138 + 13[/tex]

[tex]73p = -125[/tex]

Now, divide both sides of the equation by 73

[tex]\frac{73p}{73} = \frac{-125}{73}[/tex]

∴ p = - 1.71

Hence, the solution to the given equation is p = - 1.71

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Express in scientific notation. Choose the answer with the proper number of significant figures.

Answers

Answer:

it is the answer thanks

give me brainly

the following are the ages in years of members of group 8, 11, 8,10 ,6, 7, 3x ,11, 11
if the mean age is 9years
find:
1.x
2.find the modal age
3.find the median​

Answers

Answer:

X = 3

Mode: 11median: 9

Step-by-step explanations

3x = 3*2 = 6

(6,7,8,8,9,10,11,11,11)/9 = 81/9 = 9

The value of X = 3

Mode: 11

Median: 9

What are mean and median?

The mean is the average value which can be calculated by dividing the sum of observations by the number of observations

Mean = Sum of observations/the number of observations

Median represents the middle value of the given data when arranged in a particular order.

Mode is that number that appears most frequently in the given set of data.

We are given that  the ages in years of members of group 8, 11, 8,10 ,6, 7, 3x ,11, 11 if the mean age is 9 years

3x = 3(2 )= 6

Mean = (6,7,8,8,9,10,11,11,11)/9

= 81/9

= 9

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Given f(x)=2x+9, if f(x)=15, find x

Answers

Answer:

x = 3 I think

Step-by-step explanation:

h. mmm yess I think

Answer:
f(x)=39
Expiation:
f(x)=2x+9,f(x)=15 you substitute the x for the 15.
f(15)=2(15)+9
f(15)=30+9
f(15)=39

which of the following pairs of triangles can be proven congruent through SAS​

Answers

Answer:

a and d

Step-by-step explanation:

The y –intercept of the function is_____________.
A. (0,0)
B. (0,2)
C. (2,0)
D. none

Answers

Answer:

B

Step-by-step explanation:

(x,y)

(0,2)

the 2 lands on the y so therefor 2 is the y-intercept

i hope this helps :)

I concur that the y-intercept of the function is represented by the ordered pair, (0,2), as it is the value of y when the x-value = 0. The y-intercept is the point on the graph where crosses the y-axis [as given by the ordered pair, (0,b)]


Therefore, option B is correct: (0,2)

make sure to show your work. Please dont answer if you dont know. There are two attachments.
Your prize: Brainliest and 30 points

Answers

Step-by-step explanation:

Number 1

180° = x + 70° + 55° + 30°

180° = x + 155°

x = 180° - 155°

x = 25°

Number 2

x° = 93°

y° = 47°

z° = 180° - 47° - 93°

z° = 180° - 140°

z° = 40°

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What is the distance between point A(−1, 3) and point B(−8, 3) ?

2 units

5 units

7 units

9 units

Answers

Answer:

7 units

Step-by-step explanation:

Answer:

7 units

Step-by-step explanation:

d = √(x2-x1)²+(y2-y2)

d = √((-8-(-1)² - (3-3)²

d = √ (-7)²-0

d = √49

d = 7 units

Which situation could be represented by -11?

Answers

Answer:

Your answer is A.  A depth of 11 feet below sea level  ( Sea level is 0 in this case ).

Step-by-step explanation:

click on file! please help, thank you!! <3​

Answers

15+3x-4+6x= 9x+11 add 6+3 then subtract 15-4

3y-4x+8x-y= 4x+2y add -4+8 then subtract 3-1

5x+8x+10x-3x= 20x Add 10+5+8 to get 23 then subtract 3

( BRAINLIEST QUEATION)
A bank offers 2% simple interest per year. A woman opens an account with deposit of 900 pounds. She closes the account 2 years later. How much will she withdraw.

Answers

simple interest formulae = PRT/100

where

p stands for percentage (2%)

r stands for rate ( 900)

t stands for time (2 years )

2×900×2/100

=3600/100

=36

Deposit interest

Level : SHS Keyword : deposit interest, simple interest

Deposit Interest in 2 years

= D × i × T/365 days

= 900 pounds × 2% × (365 × 2 years)/365 days

= 900 pounds × 0.02 × 730 days/465 days

= 900 pounds × 0.02 × 2

= 36 pounds

Her Deposit in 2 years

= 900 pounds + 36 pounds

= 936 pounds

So, her deposit if she will withdraw is 936 pounds

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If the expression is expanded, what is the coefficient of x? 4(3x+5)

Answers

Answer:

12

Step-by-step explanation:

4 ( 3x + 5 )

= 4 ( 3x ) + 4 ( 5 )

= 12x + 20

The coefficient of x in 12x is 12.

The answer to this question that I’ve been stuck on for a long time

Answers

Answer:

x = -3/2

Step-by-step explanation:

Write an equation in​ point-slope form of the line that passes through the given point and with the given slope m.

(-7,5); m = 6

Answers

the answer is : y - 5 = 6 ( x + 7)

find the answer for the question below

Answers

Answer: 16.25 or 16 1/4 miles a week

Step-by-step explanation:

Since the route is 3.25 miles long, and chloe and corinne ride the route 5 times a week, we can use the equation 3.25 x 5 to get to our solution.

3.25 x 5 = 16.25

A 20 foot ladder is set against the side of a house so that it reaches up 16 feet. If Christian grabs the ladder at its base and pulls it 2 feet farther from the house, how far up the side of the house will the ladder reach now? (The answer is not 14 ft.) Round to the nearest tenth of a foot.

Answers

Answer:

14.2

Step-by-step explanation:

The ladder forms a right angles triangle,

We have,

h=20

p=16

b=x

Using pythogorean theorem,

b=√(20^2-16^2)

√144

b=12

Now,

Since, she pulls it 2 cm,

b=x+2

b=14

p=?

Using pythogorean theorem,

p=√(20^2-14^2)

√204

p=14.2828568571

Rounding  to the nearest tenth,

p=14.2

The side of the ladder will reach up is 14.3 feet.

What is trigonometric Ratios?

"Trigonometric Ratios are defined as the values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle. It is with respect to any of its acute angles are known as the trigonometric ratios of that particular angle".

For the given situation,

Hypotenuse, h = 20 feet

Perpendicular, p = 16 feet

Base = b

By Pythagoras theorem,

[tex]h^{2} = p^{2} + b^{2}[/tex]

⇒[tex]20^{2} = 16^{2}+b^{2}[/tex]

⇒[tex]b^{2} = 400-256[/tex]

⇒[tex]b^{2}=144[/tex]

⇒[tex]b=\sqrt{144}[/tex]

⇒[tex]b=12[/tex]

The ladder at the house is pulled 2 feet farther.

So, base = [tex]12+2[/tex]

⇒[tex]b=14[/tex]

Now, the side of the ladder will reach up

[tex]p^{2} = h^{2}-b^{2} \\[/tex]

⇒[tex]p^{2}=20^{2}-14^{2} \\[/tex]

⇒[tex]p^{2}=400-196[/tex]

⇒[tex]p^{2}=204[/tex]

⇒[tex]p=\sqrt{204}[/tex]

⇒[tex]p=14.28[/tex]

⇒[tex]p=14.3[/tex] (rounded off to nearest tenth)

Hence we can conclude that the side of the ladder will reach up is      14.3 feet.

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What is the weight, in kg, shown by the arrow on the scale below?

See pic attached

Answers

Step-by-step explanation:

according to arrow the weight is 1400 g.

we know,

1 kg = 1000 g

so,

1 g = 1/1000 kg

so,

1400/1000 = 1.4 kg ans

hope this answer helps you dear!

Answer:

1.4 kg

Step-by-step explanation:

1400 grams, to find kg you have to divide by 1000

classify -0.25 as rational or irrational. explain.

Answers

I think it is ripple effect

Answer:

Rational

Step-by-step explanation:

Rational numbers include fractions and decimals that end or have a pattern. Irrational numbers, however, do not end and have an arbitrary pattern. -0.25 is rational because it is a terminating decimal which means it ends.

Examples of irrational numbers include:

√2 , -√101 , π (pi)

Examples of rational numbers include:

-0.89 , √16 , 1/3

i hope this helps :)

i got this for my classwork does anyone know how to solve this step by step​

Answers

Answer:

http://www.cssdrive.com/

Step-by-step explanation:

Pls help me with this question and explain thx!!

Answers

Answer: 50 pages (not sure) but I hope that still made sense though

Step-by-step explanation:

30% of 15 equals 50

15/30%=50

He needs to read 35 more pages. Multiply 30% by 3 that’s 90. 15 by 3 as well that’s 45. One-third of 30 is 10, 90+10 is 100%, one third of 15 is 5. Just add 45 and 5 and you get 50. Take away 15 for the amount of pages he already read, that’s 15

The numbers shown above belong to which of the following sets of numbers?

I. Rational Numbers
II. Natural Numbers
III. Whole Numbers
IV. Integers
A.
I, II, III, and IV
B.
I and IV only
C.
II only
D.
I only

Answers

The answer is iii which are whole numbers

The correct way of representing different types of numbers is,

B. I and IV only

What are sets and subsets?

A set is a collection of well-defined objects.

A subset contains all the elements or a few elements of the given set.

The improper subset is when it contains all the elements of the given set and the proper subset is when it doesn't contain all the elements of the given set

                                   Complex numbers (a + ib)

Real numbers                                                                 Imaginary numbers.

(a + i0)                                                                                      (0 + ib)

Rational numbers               Irrational numbers

(perfect squares)              (non-perfects squares)

Fractions.  

(p/q, q ≠ 0)            

Integers.

(whole nos. -: 0 to ∞)

(negative integers -: - ∞ to - 1)

(positive integers -: 1 to ∞)

The type of numbers in which every next type is a subset of the previous type is Natural numbers ⊂ Whole numbers ⊂ Intergers ⊂Rational numbers.

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___% of 75 is 25

Please help

Answers

Answer:

33.33

Step-by-step explanation:

Answer:

33.33%

If you like my answer than please mark me brainliest thanks

Which line has a larger slope?

Answers

Answer:

the one on the right looks best for the slope because the slope is a lot larger than the one on the right the one on the right is smaller but a few inches few times I don't know you might want to check it before I actually answer it for you so I hope you found this kind of helpful thank you bye

I have to hit 70 to finish plz help ?!?!?!

Answers

1+14+2+9+18=44
14/44
7/22
I hope this helps

Pls help I will give 20 points if anwser is correct

-8 3/4 divide 2 1/6

Answers

Answer: Improper form: -106/26 Mixed fraction form: -4 1/26

Decimal form: -4.03846153...

Step-by-step explanation: Simplify the expression, if possible, by cancelling the common factors.

HELP ME PLEASE What is 6,728 ÷16

Answers

Answer:

420.5 or 420 1/2

Step-by-step explanation:

the larger of two numbers is nine more then four times the smaller number the sum of the two numbers is sixty-nine find the tow numbers

Answers

Answer:

i do not know

Step-by-step explanation:

Can someone tell me how you got the correct answer for these questions

Answers

Answer:

Q13/ slope = 2

Q14/ slope = 8

Step-by-step explanation:

Q13/

[tex]slope = \frac{y2 - y1}{x2 - x1} \\ \\ = \frac{ - 5 - 5}{ - 3 - 2} = \frac{ - 10}{ - 5} \\ \\ = \frac{10}{5} = 2[/tex]

Q14/

[tex]slope = \frac{y2 - y1}{x2 - x1} \\ \\ = \frac{ - 8 - 8}{7 - 9} = \frac{ - 16}{ - 2} \\ \\ = \frac{16}{2} = 8[/tex]

I hope I helped you^_^

Evaluate 5 + {2[(48 – 40) ÷ 4 + (2 x 5)]}

29
28
45
19

Answers

Answer:

29

Step-by-step explanation: 5 + 2 [(48 - 40)/4+(2 x 5)]

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