Mathematics Middle School

Function (f) is defined by the equation f(x)=3x-7. Find the value of c so that f(c) =20 is true.

Answers

Answer 1

Answer: C=9

explanation:

hope this helps

Answer 2

The value of c so that the function f ( c ) = 20 is when c = 9

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is given by

f ( x ) = 3x - 7

Now , substituting the value of f ( x ) = 20 , we get

when x = c

f ( c ) = 3c - 7

The value of the equation f ( c ) = 20

Substituting the value in the equation , we get

3c - 7 = 20

On simplifying the equation , we get

Adding 7 on both sides of the equation , we get

3c = 27

Divide by 3 on both sides of the equation , we get

c = 9

Therefore , the value of the variable c = 9

Hence , The value of c so that the function f ( c ) = 20 is when c = 9

To learn more about equations click :

https://brainly.com/question/19297665

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Related Questions

plz don't answer without a real answer brainly first to answer
Drag the numbers to order them from greatest to least, with the greatest at the to. sqrt{17} , sqrt{12} , 4.923935........, 5.03709......

Answers

Answer:

I think it's 4.923935,5.03709,{17},{12}

Step-by-step explanation:

don't get mad at me if it's wrong sry

Answer:

1. 5.03709 2. 4.923935 3. sqrt{17} 4. sqrt{12}

Step-by-step explanation:

Need a B in math by Thursday HELPP PLEASE

Answers

The y intercept is (0,1)

Slope-intercept form is Y=mX+B.
B would be the Y-intercept, in this case, B is 1, so your Y-Intercept is 1

CAN SOMEONE HELP ME (30 POINTS)

Answers

Answer:

I'm pretty sure A

Step-by-step explanation:

-20 divided by 5

Answer:

The answer is A, -20 divided by 5

Step-by-step explanation:

As you can see on the chart, alongside the 20 is five smaller arrows, all you need to know is that you would divide the total temparature ( 20 ) by the five smaller arrows if that makes any sense :)

After you multiply a number by 9 and subtract the product from 300, the difference will be 183. Find the number.

Answers

Answer:

x=13

Step-by-step explanation:

300-(9x) =183

300-183=9x

117=9x

x=117/9

x=13

check:

300-117=183

The first and second box choice's are Robert and Eileen.

And the Last box the answer choice's are 1.3, 2.7, 8.2, 28.9

Answers

Answer:

Robert bikes faster than Eileen by 1.3 mi/h

Step-by-step explanation:

first we have to find the mph rate

Robert: 9.5

Eileen: 8.2

Estimate the unit rate to the nearest hundredth

The unit rate is about $_ per egg.

Answers

Answer:

$2.40 per egg

$2.35

5 or more, round the number

Since we are rounding by the nearest hundred, the correct answer is $2.40 per egg

what is the total length if the larger box has a length of 8 inches Amelia i-ready middle school

Answers

Answer:

Can you rephrase your question? It is incomplete

Step-by-step explanation:

V=L×W×H V=8×1 3/4×12 1/8 V=169.75in3

Use mental math to find the sum.
80+40+170

Answers

Answer:

290

Step-by-step explanation:

80+40=120

120+170=290

290

Answer:

290

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

Identify the y-intercept of the line: y = 3x/4 - 3

Answers

Answer:

with -3 being your slope and 4 being your y-intercept.

Step-by-step explanation:

In y=mx+b your b is the m is the slop and b would be the y-intercept.. -3 would be your y-intercept

-16= -4 + w over 4 Help please lol

Answers

Answer:

w=-60

Step-by-step explanation:

-16=-4+w/4

-64=-4+w <-- you multiply both sides by 4

-60=w <-- you add both sides by -4

w=-60 <-- final answer

please help its that last question
26 PTS

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

Solution ~

[tex]7 \dfrac{5}{6} - 3 \dfrac{1}{2} [/tex]

[tex] \dfrac{47}{ 6} - \dfrac{7}{2} [/tex]

[tex] \dfrac{47 - 21}{6} [/tex]

[tex] \dfrac{26}{6} [/tex]

[tex] \dfrac{13}{3} [/tex]

[tex]4 \dfrac{1}{3} [/tex]

Please help! I need it asap.

Answers

Answer:

What?

Step-by-step explanation:

Use mental math to find the sum.

67 + 25

Answers

92 is the sum jdjjxiqjjxjwxhwxwqsqxhwqdqqsjkzkxqxkuwx

the sum for 67+25 is 92

Ms. Martin ordered new pom poms for her cheerleaders. She paid $157.94, which included 6% sales tax. How much were the pom poms before tax?

Answers

Answer:

$149.00

Step-by-step explanation:

Selling Price = Final Price / 1 + Sales Tax

(reverse tax calculator)

"For Example:

If your total receipt amount was $57.98, and you paid 1.07 percent in sales tax, you’d simply plug those numbers into our calculator to find out that your original price before tax was $57.37. From there, it is a simple subtraction problem to figure out that you paid .61 cents in sales tax."

$149:00 your welcome

Graph y=2x−7y
Please help I am struggling whoever helps me with the correct answer I will mark "Brainlyist"

Answers

0,0. 4,1 slope 1/4. Hope this helps

0.0 the slope is 1/4

I need help on my math
I need help on d

Answers

Answer:

If the diameter is 12, the 90° arc is (1/4)Π(12), or 3Π (approximately 9.42).

Step-by-step explanation:

if wrong pls forgive me

if right mark me brainliest

a. Diameter =1cm
Radius = diameter/2
Radius =1/2
Circumference =2x22/7x1/2
=44/14 = 22/7
=3.14cm

graph the ordered pair (-4,-1)

Answers

Answer:

-4 would be in the x axes and -1 would be in the y axes

Step-by-step explanation:

I hop i explained it well

The drawing i took dosent want to post

Answer:

Go to the x-axis (horizontal part) and find -4 on your graph. Then go down on the y-axis (vertical part) and look for -1. That's where you're going to plot the point, (-4, -1). I attached a photo to give you a visual.

HELP for math!! thanks :)

Answers

Answer:

The answer is B

Step-by-step explanation:

The answer is the second one

Find an equation of the line that passes through the points (2,6) and (-4.6). Write the equation in slope-intercept form.

Answers

Answer:

change in y /change in y to get the gradient . therefore (6--6)=12 and (2--4)=6 thus 12/6=2 that the gradient.

Step-by-step explanation:

form the equation ion form of y=mx+c

and thus the equation y= 2x+c

if you take one point coordinate such as (2,6)

such that y=6 and x=2 thus the equation will be

6=2*2+C

6=4+C

C=6-4=2

therefore answer is

Y=2X+2

Answer:

Y=2X+2

Step-by-step explanation:

Help pls, will choose brainliest if explanation is provided

Answers

Answer:

[tex]solve \: when \: (f + g) \:(4) \\ \\ first \: solve \: for \: f(x) \\ \: \\ solution \: .... \\ \\ f(x) = 4x - 3 \\ f(4) = 4(4) - 3 \\ f(4) = 16 - 3 \\ f(4) = 13 \\ \\ \\ now \: solve \: for \: g(x) \\ \: \\ solution \: .... \\ \\ g(x) = {x}^{3} + 2x \\ g(x) = {(4)}^{3} + 2(4) \\ g(x) = 64 + 8 \\ g(x) = 72 \\ \\ (f) - (g) = 13 - 72 \\ (f) -(g) = -59[/tex]

I need help with two things!
(Please explain how to get the answer)

Answers

1: Morgan is incorrect because 10 to the power of three equals 1000. So 1000 times 2.23 equals 2230. Second one I have absolutely no clue. Sorry if I’m wrong

2. divide the first factors and then subtract the exponents

so 7.488 divided by 3.12 which is 2.4
then -8 - 2 which is -10

put them together and you get 2.4*10^-10

A store bought a fancy deck of cards for $36 and sold it for $72. What was the markup percentage?

Answers

Answer:

100%

Step-by-step explanation:

It’s 50 sometimes you need to work out the steps with a calculator or brain lol

Help I’m stuck!!!!!!!!!

Answers

0.45 i think just into fractions

2.222... (repeating) gallons

Due right now!!! fast please and right :)

Answers

Answer:

Phyllis starts with 50$ and Chen starts with 15$.

Step-by-step explanation:

Write the equation of the line that passes through the following points: (7,5) (7,4)

Thank you.

Answers

Answer:y-5=0

Step-by-step explanation:

can someone help with this pls? i don’t understand math at all

Answers

Answer:

hey _ second answer is right _ ok

I wanna say it’s B. It shows how you distribute the a to the other letters.

can yall help me? please I need the right answer tbh

Answers

Answer:

the answer is D

Step-by-step explanation:

because if A is wrong and producers go through photosynthesis first ten d is the correct answer Hope This Helps <3

the answer to your question is D.

5/6=1/3+d
What fraction or decimal does d equal?

Answers

d =

fraction : 1/2

decimal : 0.5

5/6=1/3+d
1/3 to the same denominator
5/6=2/6+d
Minus 2/6 from both sides
3/6=d
Simplify
3/6=1/2
So d = 1/2 or 0.5
Plz give me brainliest answer

Zoua’s older sister borrowed $3,000 from a bank to buy a used car. She asked Zoua to figure out the total amount she will have to pay back at a 4.6% simple annual interest rate over a period of 48 months. How much will Zoua’s sister have to pay the bank?
A 48.30
B 483.00
C 3048.30
D 3552.00

Answers

Answer:

Answer is C

Step-by-step explanation:

hope you have s good day

Answer:
C

Explanation:

Zachary purchased a computer for $1,600 on a payment plan. Two months after he purchased the computer, his balance was $1,370. Four months after he purchased the computer, his balance was $1,140. What is an equation that models the balance y after x months?

Answers

Answer:

Step-by-step explanation:

You are finding out each time how much is the items Zachary bought.

Then inputting a equation

$1,600 - ??? = $1,370

To find the unknown number, you must subtract the 2 original numbers.

$1,600 - $1,370 = $230

Computer costs: $230 leaving Zachary with $1,370 left.

Next, it says he purchased another computer...

$1,370 - ??? = $1,140

Again, we subtract the 2 original numbers to find the unknown.

$1,370 - $1,140 = $230 leaving Zachary with $1,140 left.

Now we input this data into an equation...

y = -230x + 1600.

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