Given f(x) = 3x + 9, find x when f(x) = 21.
A)
3
B)
4
C)
7
D)
10

Answers

Answer 1

Answer:

B)

Step-by-step explanation:

3(4) + 9 = 21


Related Questions

W-4y+z=0 for z (please show work)

Answers

Answer: z=-w+4y

Step-by-step explanation:

W-4y+z=0

Calculate product

w-4y+z+0

Move variables to the right

Karen spent 39 minutes knitting 3 hats. In all, how many hats could Karen knit in 117 minutes

Answers

9 because 39\3 =13 and 13 divide by 117 =9

7 Given: -8(w + 1) = -5(w + 10); Prove: w = 14
Statements

Answers

Answer:

w=14

Step-by-step explanation:

-8(w + 1) = -5(w + 10)

Remove the parentheses

-8w-8+-5w-50

Move terms

-8w+5w=-50+8

Collect like terms and calculate

-3w=-42

Then divide on both sides

A number decreased by 22 is 44. Which equation can be used to solve this problem

Answers

Answer:

44+22=x or x-22=44

Step-by-step explanation:

X is the unknown, and so x decreased (minus) 22 is(equals) 44, so x-22=44.

Hope this helps please mark brainliest :D

If you study an extra 10 hours a week for a year (52 weeks) and you earn a four-year scholarship valued at $50,000, what is your hourly return on your investment in study time? (Round to two decimal places)

Answers

Answer: $96.15

Step-by-step explanation:

If you study an extra 10 hours per week, for 52 weeks, in total you studied 52 times 10 hours, this is:

52*10 h = 520h hours.

Now, for these 520 hours of hard work, you earn a scholarship valued (in total) at $50,000.

Then how much is worth each one of these 520 hours?

Let's take divide the value of the scholarship evenly into the 520 hours:

$50,000/520h = $96.15.

This means that the hourly return is $96.15

​ Commemorative coins come in packs of 15, while coin holders come in packs of 25. What are the least numbers of packs you should buy in order to have the same numbers of coins and coin holders?

Answers

Answer:

5 Commemorative coin packs

3 coin holders

Step-by-step explanation:

Multiply two and four-fifths negative five and two-thirds

Answers

The answer is -25/3.



If you need it simplified let me know.

what is the dit between -4 and 6​

Answers

the difference is 2 , just -4 + 6 .

which equation represents a proportional relationship? ​

Answers

Answer:

y = 1 - 1/3x

Step-by-step explanation:

Select the correct answer. Kylie has finished creating her résumé. What should be her final step to complete the résumé? A. include a photograph B. include her contact details C. proofread the document D. mention her age

Answers

Answer:

C. Proofread the document

Step-by-step explanation:

All of the other steps should have already been done when she was creating her résumé. Hope this helps!

need help asap!!!!!!​

Answers

Answer: x=4

Step-by-step explanation: first you should write it out like it is telling you. put a line and EG is the line and f is in the middle of the two looks kinda like this  E         F          G but they are on a line EG= 25 that means the whole thing equals 25. EF= 2x-6 and FG= 4x+7. when you plug that in it should look like this 25=2x-6+4x+7 then solve.

what is the reciprocal of 5 !!!help !!

Answers

Answer:

1/5

Step-by-step explanation:

The answer is 1/5 because 5= 5/1 as fraction then flip

hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelllllllllllllllllllllllllllllllllllllllllllllllllppppppppppppppppppppppppppppppp

Answers

Answer:

A

Step-by-step explanation:

Y

What is the greatest common factor of 18 and 12?

Answers

Answer:

6

Step-by-step explanation:

Determine if biconditional is true.
A) Felipe is a swimmer if and only if he is an athlete.

Answers

it is not a true biconditional.

PLS HELP ME
It takes Li 1 hour to drive 65 miles, 2 hours to drive 130 miles, and 3 hours to drive 195 miles. How many miles can he drive in 5 hours?

Answers

It takes them 5 hours to drive 325 miles!

Since they travel 65 miles per hour, you multiply 65 x 5 and you get 325! Hope I helped :)

Which operation should you perform first when evaluating the expression 32 + 2?

Answers

Answer:additon

Step-by-step explanation:

Answer:

adition

Step-by-step explanation:

Adam is climbing up the stairs in a building. At a certain point, Adam starts counting the steps and when he reaches the last step, he has counted 56 steps. If he knows that there are a total of 100 steps in the building, how many steps did he climb before he started counting the steps?

Answers

Answer:

He climed 3 steps before he started counting the steps.

Step-by-step explanation:

pls mark me as a branliest

Answer:

The answer is he climbed 44 steps. Hope this helped :D

Step-by-step explanation:

50 POINTS PLS HELP!!!!

Quadrilateral EFGH was dilated by a scale factor of 2 from the center (1, 0) to create E'F'G'H'. Which characteristic of dilations compares segment F'H' to segment FH?

A: A segment that passes through the center of dilation in the pre-image continues to pass through the center of dilation in the image.

B: A segment that does not pass through the center of dilation in the pre-image is parallel to its corresponding segment in the image.

C: A segment in the image has the same length as its corresponding segment in the pre-image.

D: A segment that does not pass through the center of dilation in the pre-image is perpendicular to its corresponding segment in the image.

Answers

Answer:

Answer choice C.

Step-by-step explanation:


Graph this line using the slope and y-intercept:
Y= 1/8X + 4

Click to select points on the graph.
10
9
8
o
6
5
4
3
2
1
0
1
2
3
4
5
6
7
8
9
10
Submit

Answers

Answer:

98765432123459 that is te answer

Step-by-step explanation:

Nine hundred light bulbs are packaged and shipped to a retail store. Thirteen percent of the light bulbs arrive broken. Which equation can be used to find the number of light bulbs that were broken? StartFraction 13 times 9 Over 100 times 9 EndFraction = StartFraction 117 Over 900 EndFraction StartFraction 13 times 9 Over 900 times 9 EndFraction = StartFraction 117 Over 8100 EndFraction StartFraction 100 divided by 9 Over 900 divided by 9 EndFraction = StartFraction 11.1 Over 100 EndFraction StartFraction 900 divided by 9 Over 13 divided by 9 EndFraction = StartFraction 100 Over 1.4 EndFraction

Answers

Answer:

3

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

HELP ME FIND SLOPE RATE CHANGE WILL GIVE BRAINLIEST

Answers

Answer:

1. RS= slope of 5/2

2. Pt= slope of -6/1 or -6

3.PQ= slope of 1/5

4. TS=slope of 0

5. QR= slope of -1/2

Step-by-step explanation:

Rise / run then simplify

Using one of the two interest formulas previously discussed, how long will it take $50,000 to
grow to $900,000 at 20% annual interest compounded quarterly? Round to the nearest
tenth.

Answers

Answer:

It will take 10 weeks

Step-by-step explanation:

im biggest brain

A problem is listed below. Identify its type.
Julie's parents' 25th anniversary is in 2 years. She'd like to give her parents a vacation package for their anniversary. She anticipates the vacation package will cost her $2000. An account at her bank pays 5% per year compounded monthly. How much does she need to deposit today in this account, so that she can buy the package deal for her parents' anniversary?
a) Simple Interest
b) Future Value with compound interest
c) Future Value with simple interest
d) Effective Rate
e) Present Value with compound interest

Answers

Answer:

e) Present Value with compound interest

Step-by-step explanation:

in order to determine how much money does Julie need to deposit we have to use the present value formula with compound interest:

present value = future value / (1 + i/12)ⁿ

future value = $2,000i/12 = 5%/12 = 0.4167%n = 24

$2,000 = present value x (1 + 0.4167%)²⁴

present value = $2,000 / (1 + 0.4167%)ⁿ = $1,810.05

you can also calculate it using the future value formula, but you will end with the present value formula:

future value = present value x (1 + i/12)ⁿ

present value = future value / (1 + i/12)ⁿ ⇒ you are adding 1 more step

you could also calculate it using the present value formula and the effective annual rate:

effective rate = (1 + 0.05/12)¹² - 1 = 5.1162%

present value = $2,000 / (1 + 5.1162)² = $1,810.05 ⇒ but again you are just adding more steps into the process

ILL GIVE YOU A BRAILLEST???

Answers

Answer:

K= 4

Step-by-step explanation:

Cross multiply

Answer:

k = 4

Step-by-step explanation:

To solve ANY proportion, you can cross multiply. For example, in this case, you can multiply 7 x 32 and k x 56. Remember, a proportion is always equal, so 7 x 32 = k x 56. That means 224 = 56k. Which means k = 4. Hope that helped!

The graph shows the proportional relationship between the number of sodas you buy and the cost of the sodas. Identify the constant of proportionality and write an equation for the proportional relationship.


A: k=3; y=3x


B: k=2; y=2x


C: k=4; y=4x


D: k=7; y=7x

Answers

Answer:

its B.

Step-by-step explanation:

all you have to do is y divided by x to find the constant of proportionality

so it would be two  y=2x

y=.2x proportional or non-propertional

Answers

Answer:

If the ratios are equivalent then the relationship is proportional. With the graph, the origin is 0,0 (the starting point). A straight line through the origin = proportional. equation is of the form y=kx (y=2x).

]

Which fraction/decimal is greater

Answers

Answer:

-5.25>-5 3/10

Step-by-step explanation:

let's convert -5 3/10 into a decimal

which is

-5.3 or -5.30

-5.25 and -5.30

because it's negative, the lowest number is the greatest number so

-5.25 is greater than -5.30

-5.25 is greater than -5.30

The probability that a 22-year-old female in the U.S. will die within one year is approximately 0.00044. If an insurance company sells a one-year, $30,000 life insurance policy to such a person for $435, what is the company's expectation? (Round your answer to the nearest dollar.)

Answers

Answer:

The value is  [tex]E(X) = \$ 421.6[/tex]

Step-by-step explanation:

From the question we are told that

The probability that a 22 year  old  female in US will die within one year is    p= 0.00044

The outcome if she dies within one year is that the company losses $30,000

Generally the probability that  a 22 year  old  female in US will live more than one year is

           [tex]q = 1 -p[/tex]

=>        [tex]q = 1 -0.00044[/tex]

=>        [tex]q = 0.99956[/tex]

The outcome if she lives more than one year is that the company gains $435

Generally the  the company's expectation is mathematically represented as

           [tex]E(X) = -30000 * p + 435 * q[/tex]

The negative sign shows that the company is loosing the fund

So  

       [tex]E(X) = -30000 * 0.00044 + 435 * 0.99956[/tex]

=>    [tex]E(X) = \$ 421.6[/tex]

A plumber charges $50 to make a house call. He also charges $25 per hour for labor. If the bill from the plumber is $162.50.
How many hours did the plumber work at your house?

Answers

4.5 hrs because 162.50-50 = 112.50
112.50/25= 4.5
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