Solve for n:
12n + 3 – 3n = 30
n = ?

Answers

Answer 1

Answer:

n=3

Step-by-step explanation:

12n-3n=30-3

9n=27

n=27/9

n=3


Related Questions

Solve each equation mentally for x.

x • 7/3 = 1

Your answer must be in the form of a fraction.

Answers

Use Cymath to find your answer.

Casey wants to buy a gym membership. One gym has a $248 joining fee and costs $27 per month. Another gym has no joining fee and costs $58 per month. In how many months will both gym memberships cost the same? What will that cost be?

Answers

Answer:

In 8 months both gym memberships will cost the same and that cost will be $464

Step-by-step explanation:

Linear Models

To compare two gym memberships, we can help Casey to form one model for each gym.

One of them charges a $248 joining fee plus $27 per month. The model for this gym is:

G1 = 27m + 248

Where m is the number of months.

The other gym has no joining fee but charges $58 per month. It's model is:

G2 = 58m

The number of months where both gyms end up charging the same can be found by equating G1 = G2, or equivalently:

27m + 248 = 58m

Subtracting 27m and swapping the equation:

58m - 27m = 248

Simplifying:

31m = 248

Solving:

m = 248/31

m = 8

When m=8, both gyms charge the same:

G1 =27*8 + 248= $464

G2 = 58*8 = $464

Thus, in 8 months both gym memberships will cost the same and that cost will be $464

7: (page 311) Triangle DEF has vertices D(1,2), E(1,6), and F(4,2). What are the coordinates of
the orthocenter of Triangle DEF?

Answers

Answer:

u

Step-by-step explanation:

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

A basketball uniform costs $!6 for the shirt and $13 for the shorts. If the coach needs to buy uniforms for 9 players, use the distributive property

Answers

it would be $171 total
The answer is 171 ............... . .

Kelvin ran in a race over the weekend and ran 4 kilometres in 20 minutes. Choose all of the th emu it rates that represent the problem A) 1 km in 5 min B)5 km in 1 min C)4/20 km in 1 min D)4/20 min in 1 km E) 3/5 km in 1 min

Answers

Answer:

A) 1 km in 5 min

C.) 4/20 km in 1 min

Step-by-step explanation:

Given that:

Kevin ran 4 km in 20 minutes

A) 1 km in 5 min B)5 km in 1 min C)4/20 km in 1 min D)4/20 min in 1 km E) 3/5 km in 1 min

4 km in 20 minutes :

4km / 20 minutes = 1km / 5 minutes

4/20 km in 1 minute = 0.2 km in 1 minute

If :

1 km = 5 minutes

x km = 1 minute

Number of kilometers in 1 minute :

1/5 = 0.2 km per minute

Hence, Option A and C

1. A right triangle is shown.
25 cm
7 cm
Based on this information, what is the length of the base of this triangle?
HELP PLS I BEG YOU

Answers

Answer:

24 is the answer

Step-by-step explanation:

answer is 24 for base

If your teacher tells you to do questions 38 through 51 in your math book for homework, how many questions is that?
Do not include units in your answer

Answers

Answer:

It would be 13 questions.

Step-by-step explanation:

If you had to do questions 31 through 51 for homework it would be 13 because...

51 - 38 = 13

Answer:

13

Step-by-step explanation:

51 - 38 = 13

also 13 + 38 = 51

brainliest.

Joe borrowed $6,000 from the bank at a rate of 7% simple interest per year. How much interest did he pay in 8 years?

Answers

Answer:

$3360

Step-by-step explanation:

7% of $6000=$420

$420 time 8= $3360

Hope this helped! :)

Answer:

$3,360

Step-by-step explanation:

So first of all you want to start by finding what P, r and t would be.

P = Principal amount ($$)

r = interest rate (%)

t = time (years)

Once I found all of those I put them into the equation (l = Prt) and solved (by putting it into a calculator obviously). That is how I came up with my answer. Check the screenshot provided to see what P, r and t would be and to see all my work! :)

Hope this helps! :)

Have a great day!


What is 9 to the first power times (-2)3?
(A) -27
(B) 36
(C) -72
(D) 27

Answers

Answer:

-72

Step-by-step explanation:

9*(-2)³ = 9*(-8) = -72

Answer:

(C) -72

Step-by-step explanation:

[tex]9^1*(-2)^3[/tex]

Any number to the exponent of 1 is equal to themselves

[tex]= 9*(-2)^3[/tex]

Solve the exponent and multiply

[tex]= 9*(-8)\\=-72[/tex]

I hope this helps!

Egghead Egghead Egghead

Answers

Answer:

the first one is an egghead, gordon ramsey is not an egg

Step-by-step explanation:

Neeeeeed help?!?!!!!!!!

Answers

Step-by-step explanation:

number of minutes I guess

What is a correct name for ange 5?

Answers

Answer: KVL

Step-by-step explanation:

This would be the correct name for the angle since the V needs to be in the middle of the answer. In the angle you can see L V and K all pass 5 making it the correct name for the angle

8. Quincy pays $150 every four months for karate lessons. Hailey pays $120 every three
months for karate lessons. At this rate, how much does Quincy pay per month for
lessons?

Answers

Answer:

$37.50 per month

Step-by-step explanation:

150/4 = 37.50 per month

Work out the probability of getting a 5. Give your answer as a fraction in its simplest form.

Answers

Answer:

1/6

Step-by-step explanation:

if you are talking about a dice roll, then the probability of getting anything is 1/6

prove that:
tan80°=2tan 70°+ tan10°​

Answers

tan80=5.67
2tan70+tan10=5.67

So tan80=2tan70+tan10

Answer:

kunjal brother answer is correct hope it's help you have a good day ☺☺ keep smiling be happy stay safe ☺☺

11
Which of these represents point-slope form of a linear equation?

y = mx + b

y - y1 = m(x - 1)

Ax + By = 0

y=kx

Answers

Answer:

second one..........

The point-slope form of a linear equation is represented by y = mx + b.

Option A is the correct answer.

What is equation of a line?

The equation of a line is a form of representing the set of points, which form a line in a coordinate system. 

The general equation of a straight line is given as:

y = mx + c,

where m = slope of the line and c = y-intercept.

We have,

y = mx + b _____(1)

y - y1 = m(x - 1) _____(2)

Ax + By = 0 _____(3)

y=kx ______(4)

From all the equations given above, we see that,

Equation (1) is in the form of a point-slope.

Thus,

The point-slope form of a linear equation is represented by y = mx + b.

Option A is the correct answer.

Learn more about equation of a line here:

https://brainly.com/question/14200719

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Solve the inequalities in Exercises 17 to 20 and show the graph of the solution in each case on number line.

17. 3x – 2 < 2x + 1​

Answers

Answer:

x < 3

Step-by-step explanation:

3x - 2x - 2 < 1

3x - 2x < 1 + 2

x < 1 + 2

x < 3

For the graph, look at the picture.

How do you get the fully simplified slope-intercept form?​

Answers

Answer:

y = 3x - 7

Step-by-step explanation:

Slope-intercept form:

y = mx + b

Where:

y is the y value.

m is the slope.

x is the x value.

And b is the y-intercept.

First, you want to find your slope. To do this, you can either use the slope formula to find the slope, or just count on the picture:

m = rise/run

m = 3/1

m = 3

With the slope formula, you first need to choose two points.

I chose:

(2, -1) and (3, 2)

Slope formula:

m = (y2 - y1) / (x2 - x1) {It doesn't matter which point you choose to be x2 and x1, just be consistent when you plug it into the formula}

m = (2 - (-1)) / (3 - 2)

m = 3/1

m = 3

Now that you have your slope, all you need is your y-intercept. To find your y-intercept, you can either look at the graph (again) to see where the line intersects with the y-axis, or you can solve it algebraically:

y-int = -7

To solve algebraically, choose a random point on the line and plug it into what you have for your equation so far and then solve for b.

I chose:

(2, -1)

y = 3x + b

-1 = 3(2) + b

-1 = 6 + b

-1 - 6 = b

b = -7

Now you have your final answer:

y = 3x - 7

can someone help plz​

Answers

Answer:

4 possible real zeroes

solutions are

[tex]x=\sqrt{3}\\x=-\sqrt{3}[/tex]

x = 1

x = -1

Step-by-step explanation:

4th order polynomial therefore there are 4 possible solutions.

factoring it:

(x^2-3)(x^2-1)

Solve for x

x^2 - 3 = 0

x^2 = 3 ; take the square root of both sides

[tex]x=\sqrt{3}\\x=-\sqrt{3}[/tex]

x^2 - 1 = 0

x^2 = 1

x = 1

x = -1

help me I need help on this

Answers

It’s 1 :) I hope it helps

Answer:

It is 1.

Step-by-step explanation:

Hope this helped have an amazing day!

which is the area of a circle with a diameter of 7 units? (use 3.14 for pi)​

Answers

Answer:

The area of circle = πR ^2

And diameter = 7 units

By interchanging d in R =d/2 = R =7/2 = 3.5

Step-by-step explanation:

πR ^2 =3.14 x (3.5)^2 =3.14 x 3.5 x 3.5 =38.465 (unit)^2 Answer

Hope it's help ^_^


14. Sharlene bought 4 CDs at the music store. Each cost $14.95.
She was charged 5% sales tax on her purchase. What was
the total cost of her purchase?

Answers

Answer: $62.79

Step-by-step explanation: i got it right on my test

Paula wins three-quarters of her tennis matches. She loses the rest. What is the ratio of wins to losses?

Answers

Answer: 3:1

Step-by-step explanation:

write the factored form of the polynomial.

P(x) = x4 – 7x3 + 13x2 + 3x – 18

Answers

Answer:

(x+1)(x-2)(x-3)^2

Step-by-step explanation:

Sorry, mate. That math is too hard to type out online. You's guys will just have to take my word for it!

SOMEONE PLEASE HELP ME WITH THIS!

Answers

Answer:

(−1)(5x+2)

Step-by-step explanation:

I googled it

Answer:

(x-1)(5x+2)

Step-by-step explanation:

5[tex]x^{2}[/tex] + 2x - 5x - 2

(5[tex]x^{2}[/tex] + 2x) (- 5x - 2)

x(5x + 2) -1(5x + 2)

(x-1)(5x+2)

7.5d = 2.5d Lin divided each side by 2.5d and Elena subtracted 2.5d from each side with both leads to the solution

Answers

Answer:

Elena's move will lead to the solution of the problem

Step-by-step explanation:

To solve the equation 7.5d=2.5d, Lin divides each side by 2.5d, and Elena subtracts 2.5d from each side. Will both moves lead to the solution? Explain your reasoning

Given:

7.5d = 2.5d

Lin divides each side by 2.5d, Lin:

7.5d / 2.5d = 2.5d / 2.5d

3 = 1

This can not be the solution to the problem because 3 can not be Equal to 1

Elena subtracts 2.5d from each side

7.5d = 2.5d

7.5d - 2.5d = 2.5d - 2.5d

5d = 0

This can lead to the solution of the problem

Elena's move will lead to the solution of the problem

Teddy has two piggy banks. The difference in the amount of money between the two banks is no more than $10. One piggy bank has $7.31 in it. Select the choices that make inequality and statement about the possible amount of money in the other piggy bank correct.

Answers

The possible amount of money in the other piggy bank correct is x < 2.69.

Given that,

Teddy has two piggy banks.

And, The difference in the amount of money between the two banks is no more than $10.

Here, One piggy bank has $7.31 in it.

Let us assume that,

The amount of money in the other piggy bank  = x

Hence, the inequality is,

7.31 + x < 10

Solve for x,

x < 10 - 7.31

x < 2.69

Therefore, x < 2.69 is the possible amount of money in the other piggy bank.

To learn more about inequality visit:

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z= -400i - 44.5 what is the real part of z?

Answers

Answer:

-44.5

Step-by-step explanation:

The i part is imaginary.

The rest is real.

The real part is -44.5

Answer:

-44.5

Step-by-step explanation:

for a complex number

[tex]z=a+bi[/tex]

a is the real part

so in our case we have

[tex]z=-44.5-400i[/tex]

a = -44.5

so the real part is -44.5

Find the slope between the following points (-3, 4) AND (-7,-5).

Answers

Answer:

slope = [tex]\frac{9}{4}[/tex]

Step-by-step explanation:

Equation to find slope: [tex]\frac{y1-y2}{x1-x2}[/tex]            (-3, 4) (-7, -5)

[tex]\frac{4+5}{-3+7}[/tex] = [tex]\frac{9}{4}[/tex]

what is the quotient 5/7 ÷ 3 1/3​

Answers

Answer: 3/14

Step-by-step explanation:

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