f(r) = r^2+4r-60

1) What are the zeros of the function

Answer:

$69 is the total cost of the bill

Step-by-step explanation:

60(1.15)

60 is the cost of the bill, and the 1.15 is the added tax plus the previous $60.

Put 60(1.15) into a calculator and

$69

Answer:

-13

Step-by-step explanation:

Given that:

Average temperature for a period of 4 days = - 8

Average temperature for a 5 day period = - 9

Temperature on the 5th day:

(total temp for the 4 days + 5th day temperature) / 5 = - 9

Let 5th day temperature = x

Total temperature for the 4 days = 4 * - 8 = - 32

(-32 + x) / 5 = - 9

-32 + x = - 45

x = - 45 + 32

x = - 13

Answer:

B

Step-by-step explanation:

Because there is 1000 people in total, the percentage of people in the school B with cellphones would be solved by finding 408/1000=.408. If you round .408 to the nearest hundredth, because the thousandth place is 8, it would round up to .41

Answer:

[tex]\huge\boxed{\text{(B)}\ 0.41}[/tex]

Step-by-step explanation:

This table will prove to be helpful to find the probability that a student has a cell phone and is from School B.

First off, we know that a total of 1000 students were interviewed, both from School A and from School B.

We also know that 479 of those 1000 were from School B (total on the right).

Looking further into School B, we can see that 408 students from school B have a cell phone.

Therefore, we can find the probability by finding 408 / 1000.

[tex]408 \div 1000 = 0.408 \approx 0.41[/tex]

Therefore, the probability that a randomly selected student is from School B and has a phone is 0.41, or 41%.

Hope this helped!

Answer:

1

Step-by-step explanation:

[tex]cos²30° + cos²60° + cos²90°\\ + 2 cos 30° cos 60° cos 90° \\ \\ = \bigg( \frac{ \sqrt{3} }{2} \bigg) ^{2} + \bigg( \frac{ 1 }{2} \bigg) ^{2} + \bigg( 0\bigg) ^{2} \\ + 2 \times \frac{ \sqrt{3} }{2} \times \frac{ 1 }{2} \times 0 \\ \\ = \frac{3}{4} + \frac{1}{4} + 0 + 0 \\ \\ = \frac{3 + 1}{4} \\ \\ = \frac{4}{4} \\ \\ = 1[/tex]

Answer:

sss

Step-by-step explanation:

since the problem dosent give angles its most likes sss

Answer:

so i cant really see it but it looks as if the two triangles are right angles and are congruent.

Step-by-step explanation:

so i hope this helps a little if so mark as brainleist pls have a nice day

Answer:

y= -1/2x

Step-by-step explanation:

Answer: 2

Step-by-step explanation:

Answer:

y = − 5 x /2 + 2

y = 2 x − 7

Step-by-step explanation:

The awnser is -7

Answer:

52

Step-by-step explanation:

Answer:

Step-by-step explanation:

3 / 4 = 39 / x

4*39 = 3*x

x = 42

Answer:

4,550

Step-by-step explanation: 7 x 650 is 4,550

Answer:

1/8x ... -1 would be the y intercept so 1/8x is the slope

Hello there, hope you are having a splendid day. :)

y=1/8x-1

This equation is written in slope-intercept form, which looks like so:

y=mx+b

Where m is the slope (1/8) and b is the y-intercept (-1).

Hope it helps. Ask me if you have any queries.

~An emotional teen who helps others with joy :)

Good luck.

Answer:

April took out a loan of $600 and paid it back with simple interest of $60 after 5 years. The formula to calculate interest is  given the principal  and the time   and the interest rate  is . For this problem we have to find the interest rate   given  . To archive that , we can just solve the equation making the interest rate the subject of the formula as shown below,

The interest rate is  or 0.02 as a decimal. The interest rate is 2% as a percentage.

Step-by-step explanation:

Answer:

2%

Step-by-step explanation:

Answer:

4 times

Step-by-step explanation:

Given that the sum of all the numbers => 3+4+5+6+7+8+9+10 = 52

And we are to divide it into two sets such that the sum of set B is three times the number of sum of set A => Sum B = 3 * Sum A

Hence Total sum = Sum B + Sum A

Total sum ÷ 4 = 52 ÷ 4 = 13.

Since Sum B = (3 * Sum A) => (3 * 13 ) = 39

Therefore Sum B = 39 and Sum A = 13

To divide them into two sets

Sum A = (10, 3) = 13: Sum B = ( 4, 5, 6, 7, 8, 9) = 39

Sum A = (9, 4) = 13: Sum B = (3, 5, 6, 7, 8, 10) = 39

Sum A = (8, 5) = 13: Sum B = (3, 4, 6, 7, 9, 10) = 39

Sum A = (7, 6) = 13: Sum B = (3, 4, 5, 8, 9, 10) = 39

Hence, the correct answer is 4 times

Answer:

x = 4.25 (A. 4.25)

Step-by-step explanation:

(For, 4x + 39) 4 times 4.25 = 17, then add 17 + 39, which gets you to 56.

( for 16x - 12) multiply 16 times 4.25 = 68. subtract 12 from 68 to equal 56.

Answer:

x = a³b + b²/ab + 1

Step-by-step explanation:

x = a² + b²/ab + 1

x = a² × (ab + 1) + b²/ab + 1

x = a³b + a² + b²/ab + 1

x = a³b + b²/ab + 1

Answer:

8 and 5

Step-by-step explanation:

Answer:

8 and 5

Step-by-step explanation:

8+5=13 and 8-5=3

Answer:

the slope is -3, the slope is negative, the y-intercept is 0

Step-by-step explanation:

this ones are the ones that apply to the graph

Answer:

64 : 1.

Step-by-step explanation:

Ratio of the volumes is 16^3 to 4^3

= 4096 : 64

= 64 : 1.

Answer:

3.41

Step-by-step explanation:

divided 20.46 by 6

Answer:

$3.41

Step-by-step explanation:

You divided the total cost by number of books.

20.46 divided by 6 = 3.41.

Answer:

4 meters

Step-by-step explanation:

Let the height at which the top of the ladder is be represented by h. The sketch of the question forms a right angled triangle. So that applying the Pythagoras rule,

[tex]/hyp/^{2}[/tex] = [tex]/Adj 1/^{2}[/tex] + [tex]/Adj 2/^{2}[/tex]

[tex]5^{2}[/tex] = [tex]h^{2}[/tex] + [tex]3^{2}[/tex]

25 = [tex]h^{2}[/tex] + 9

[tex]h^{2}[/tex] = 25 - 9

   = 16

⇒ h = [tex]\sqrt{16}[/tex]

      = 4

Therefore, the height at which the top of ladder is placed is 4 meters.

Answer: x<4

Step-by-step explanation: Let's solve your inequality step-by-step.

2x+1<9

Step 1: Subtract 1 from both sides.

2x+1−1<9−1

2x < 8

Step 2: Divide both sides by 2.

2x /2  <  8 /2

x<4

Answer:

x + x + 2

Step-by-step explanation:

cuz if its consecutive odd then its every 2 numbers so if x = 3 then you add two to x

Answer:

B

Step-by-step explanation:

I am taking the quiz and also thx to the person that answered before me

Answer:

Helpppppp

Step-by-step explanation:

Answer:

Third One

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

because there are 3 x's

Answer:

(1,220,707,125) B

Step-by-step explanation:

Answer:

the answer to number one is (13.3,2)

the answer to number two is (2,-2)

Step-by-step explanation:

Answer:

20,80

Step-by-step explanation:

[tex]Let\ Abduls\ present\ age\ be\ x\\His\ Grandfather's\ present\ age\ = 4x\\\\Abdul's\ age\ before\ 10\ years=x-10\\His\ Grandfather's\ age\ before\ 10\ years =4x-10\\\\We\ are\ given\ that\ ,\\Abdul's\ Grandfather's\ age\ before\ 10\ years = 7 * Abdul's\ age\ before\ 10\ years\\Hence, \\4x-10=7(x-10)\\4x-10=7x-70\\-10+70=7x-4x\\60=3x\\x=20\\Hence,\\Abduls\ present\ age\ =20\\His\ grandfather's\ present\ age\ = 4*20=80[/tex]

Answer:

Abdul's age=20 y/o

Grandpa's age=80y/o

Step-by-step explanation:

let Abdul's age be 'x'

so, grandpa's age=4x

Grandpa's age 10 yrs ago= 4x-10

according to the question, grandpa's age 1o yrs ago=7(x-10)

so, 4x-10=7(x-10)

     4x-10=7x-70

by substituting,

     70-10=7x-3x

     60=3x

     60/3=x

      20y/o=x

so, 4x=20*4=80 y/o

Answer:

O yes they are correct. Hernando divided 6 by 6

Step-by-step explanation:

yes there correct hernando divided 6 by 6