27(n+4)+18n=7(n-18)-40n So confused can yall help me?

Answers

Answer 1

Answer:

n = -3

Step-by-step explanation:

distribute

27n + 108 + 18n = 7n - 126 - 40n

combine

45n + 108 = -33n - 126

add 33n to both sides and subtract 108 to both sides

78n = -234

divide by 78

n = -3


Related Questions

For the function below, (a) find the vertex; (b) find the axis of symmetry; (c) determine whether there is a maximum or a
minimum value and find that value; and (d) graph the function.
f(x) = -x2 - 6x-4

Answers

Answer:

Step-by-step explanation:

f(x) = ax² + bx + c

"x" coordinate of vertex is ( - [tex]\frac{b}{2a}[/tex] )

axis of symmetry is x = - [tex]\frac{b}{2a}[/tex]

If a > 0 the function opens upward and has minimum value.

If a < 0 the function opens downward and has maximum value.

f(x) = - x² - 6x - 4

(a). x = - [tex]\frac{-6}{-2}[/tex] = - 3 ; y = - (- 3)² - 6( - 3) - 4 = 5

Coordinates of vertex are (- 3, 5)

(b). The axis of symmetry is x = - 3

(c). The given function opens downward

y = 5 is a maximum of a given function.

What’s the area for this shape??????

Answers

Answer:

40cm²

Step-by-step explanation:

The formula of a trapezium is: A=1/2(a+b)h

The values are: a=6, b=10 and h=5

Therefore, to calculate the area: A=1/2(6+10)5

Hence, the area of the trapezium is A=40cm²

Which of the following points is a solution of y s-Ixl - 1?
O (-1,-3)
O (0,0)
O (1,-1)

Answers

Answer: The answer is (-1,-3) :)

Step-by-step explanation:

Mark me as brainlest please

The swim and diving clubs at Riverdale High School have a total of 55 members and no student is a member of both teams. One-third of the swim team members are seniors and One-fifth of the diving team members are seniors. If there are 13 seniors in the two clubs, how many members does each club have? Let x represent the total number of swim club members and let y represent the total number of diving club members.

The equation that represents the total number of members is
.

The equation that represents the total number of seniors is
.

The diving club has
more members than the swim club.

Answers

Answer:

B,C,D

Step-by-step explanation:

Just did it

Answer:

it's B, C, and D

Step-by-step explanation:

Decrease 125 by 40% maths assignment

Answers

Answer:

75

Step-by-step explanation:

125 × 0.40 = 50

125 - 50 = 75

HII!!HERE'S YOUR ANSWER ANSWER= 75

STEP BY STEP EXPLANATION:

Decrease number by 40% of its value.

Percentage decrease = 40% × 125

New value

125 - Percentage decrease

125 - (40% × 125)

125 - 40% × 125

(1 - 40%) × 125

(100% - 40%) × 125

60% × 125

60 ÷ 100 × 125

60 × 125 ÷ 100

7,500 ÷ 100

=75

HOPE IT HELPS YOU OUT PLEASE MARK IT AS BRAINLIEST AND FOLLOW ME PROMISE YOU TO FOLLOW BACK ON BRAINLY.IN!!

The chemical element einsteinium-253 naturally loses its mass over time. A sample of an einsteinium-253 had an initial mass of 540 g when we measured it. The relationship the elapsed time T in months and the mass m(t) in grams left in the sample is modeled by the following function m(t)=540•(1/8)^t/2.05 complete the following sentence about the rate of change in the mass of the sample

Answers

Answer: The sample loses 7/8 of its mass every 2.05 months.

Step-by-step explanation:

I got it right on khan academy

A baseball team had $250 to spend on supplies. The team spent $46.25 on a new bat. New baseballs cost $2 each. The inequality46.25+2b≤250 can be used to determine the number of new baseballs, b, that the team can purchase.

Answers

Answer: 101

[tex]\leq 46,25+2b\leq 250\\\\=> 2b\leq 250-46,25=203,75\\\\<=> b\leq 203,75/2=101,876[/tex]

but b is the number of new baseballs

=> [tex]b\leq 101[/tex]

=> the team can purchase 101 baseballs

Step-by-step explanation:

A bird is flying at a constant rate.

This equation y = 8x + 15 can be used to represent this situation, where y is the bird's elevation in meters and x is the number of minutes the bird has been flying.

Which statement best describes the bird's elevation, given this equation?


The bird started at a height of 15 meters and is ascending at 8 meters per minute.

The bird started at a height of 8 meters and is ascending at 15 meters per minute.

The bird started at a height of 15 meters and is descending at 8 meters per minute.

The bird started at a height of 8 meters and is descending at 15 meters per minute.

Answers

Answer:

the answer is The bird started at a height of 15 meters and is ascending at 8 meters per minute.

Step-by-step explanation:

i know things

Answer:

the answer is A

Step-by-step explanation:

What is the length of the radius of a circle with center (10, -14) that is tangent to the line
x=13?

Answers

Answer:

length of radius of a circle = 3

Step-by-step explanation:

a tangent line touches the circle at one point

if the tangent line is at x=13 (vertical line) and the center of the circle is

(x,y) = (10,-14) with its center x at 10; then take the difference to find the radius;

x(tangent line) - x(center of circle) = radius of circle

length of radius of a circle = 13-10 = 3

you can also graph the circle and draw the tangent line to find the radius

The length of the radius of a circle as described in the question is; 14.32

The center of the circle is at; (10, -14)

The line that is tangent to the circle is; x = 13.

The coordinate of a point on the line is therefore; (13, 0)

The length of the radius of the circle can.be obtained from Pythagoras theorem as;

(Radius)² = (13-10)² + (-14-0)²

(Radius)² = (3)² + (-14)²

(Radius)² = 9 + 196

Radius = √205

Radius = 14.32

Read more:

https://brainly.com/question/10443107

Which equation can be used to find 40 percent of 25?
25+ 1 25
401 40
100x4 400
40x4 16
40x4 180
25%4 100
404
100_4 25

Answers

Answer:

Yo tengo 10 años y eso da 1,190

Step-by-step explanation:

a =
I need help I’m so confused

Answers

Step-by-step explanation:

b=

help me HAHAHAHAHAHAHAHAHAHAHAHHA

Answer:

a = 6

Explantion :

hope this helps!

A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind. Find the speed of the wind if the​ pilot's speed in still air is 315 miles per hour.

Answers

Given:

A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind.

Pilot's speed in still air is 315 miles per hour.

To find:

The speed of the wind.

Solution:

Let the speed of wind be x miles per hour.

Speed with wind = 315+x miles per hour

Speed against wind = 315-x miles per hour

We know that,

[tex]Time=\dfrac{Distance}{Speed}[/tex]

According to the question,

[tex]\dfrac{450}{315+x}=\dfrac{360}{315-x}[/tex]

Divide both sides by 90.

[tex]\dfrac{5}{315+x}=\dfrac{4}{315-x}[/tex]

By cross multiplication, we get

[tex]5(315-x)=4(315+x)[/tex]

[tex]5(315)-5x=4(315)+4x[/tex]

[tex]5(315)-4(315)=4x+5x[/tex]

[tex](5-4)315=9x[/tex]

Divide both sides by 9.

[tex]\dfrac{(1)315}{9}=x[/tex]

[tex]35=x[/tex]

Therefore, the speed of wind is 35 miles per hour.

first correct answer will get brainliest
Solve: 3(5-2 ) +I-5I = ?


7

15

4

14

Answers

Answer:

14

Step-by-step explanation:

when you multiply and do the absolute value thats what you get

NEED HELP PLEASE!!! Lionel created a scatter plot and drew a line of best fit, as shown.
What is the equation of the line of best fit that Lionel drew?

Answers

Answer: A.

Y=-2x+16

Step-by-step explanation:

You gotta find the pretty points on the line of the linear function. Then you have to find the slope (rise over run) with those pretty points. Then you have to use a coordinate (I used 6,4) to find the y intercept. Then you solve the equation, by plugging in all the numbers :) hope this helps.

(y - 2)2 = y2 – 6y + 4
Is this statement true or false?

Answers

Answer: False

==============================================

Explanation:

I'm assuming you meant to type out

(y-2)^2 = y^2-6y+4

This equation is not true for all real numbers because the left hand side expands out like so

(y-2)^2

(y-2)(y-2)

x(y-2) .... let x = y-2

xy-2x

y(x)-2(x)

y(y-2)-2(y-2) ... replace x with y-2

y^2-2y-2y+4

y^2-4y+4

So if the claim was (y-2)^2 = y^2-4y+4, then the claim would be true. However, the right hand side we're given doesn't match up with y^2-4y+4

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

Another approach is to pick some y value such as y = 2 to find that

(y-2)^2 = y^2-6y+4

(2-2)^2 = 2^2 - 6(2) + 4 .... plug in y = 2

0^2 = 2^2 - 6(2) + 4

0 = 4 - 6(2) + 4

0 = 4 - 12 + 4

0 = -4

We get a false statement. This is one counterexample showing the given equation is not true for all values of y.

It is false. Expand the left term, then check if both sides are equal

i will give brainlist

Answers

Answer:

oml not u making me do math

Step-by-step explanation:

not u making me do math

Please please please help

Answers

Answer:

-4/9

Step-by-step explanation:

-4 x 5 = -20

5 x 9 = 45

so you have -20/45

divide by 5 for both and you get -4/9

Hope this helps!!

3. Calculate the simple interest: $1800 at 3% for 3
years

Answers

Answer:

$1,962.00

Step-by-step explanation:

Same explanation as the previous problem

Carmen opened a bank account with
$450. Each week she deposits $60.
Write an equation to represent this situation.
60x+y=450
y=-60x+450
Oy=60x+450
y=450x+60

Answers

Y=60x+450 will be the answer

of the 24 students in Michelle's homeroom, of them rode the bus to school. How many
students in Michelle's homeroom rode the bus to school?

Answers

12 becaus math sucks

also rented a truck for one day. there was a base fee of 20.99, and there was an additional charge of 85 cents for each mile driven. aldo had to pay $210.54 when he returned the truck. for how many miles did he drive the truck?

Answers

Answer:

223 mile

Step-by-step explanation:


Jerry and Jo are making brownies for the bake sale.
Each pan of brownies will be cut into 18 rows with 12 brownies per row.
They plan to make 12 pans of brownies.
Choose Yes or No to tell if the equation shows the number of brownies they will make.
(12 x 18) ~ 12 = b
18 * (2 x 12) = b
18 x 12 = b
12 x (12 * 18) = b

Answers

Answer:

Yes

12 * (12 * 18) = b will give the total number of brownies to be made

Step-by-step explanation:

Here, we want to select which of the equations will give the number of brownies to be made

The total number of brownies is b

For each pan, we have 18 rows , with 12 per row

So the total number of brownies per pan is 12 * 18

Since they are making 12, the total number of brownies b will be;

12 * (12 * 18) = b

What is the slope of the line that contains the points (-2, 2) and (3, 4)?
A.
O B. -
O c.
OD.

Answers

Answer:  m = 2/5

Step-by-step explanation:

The formula for the slope is m = rise over run = y^2 - y^1 / x^2 - x^2

which makes it 4-2 over 3-(-2) which equals 2/5

Youre answer is 2/5

Answer:

The slope of the line that contains the points (-2, 2) and (3, 4) is 2/5.

Step-by-step explanation:

The slope of a line is denoted by m and is calculated using the formula:

[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]

Here

[tex](x_1,y_1)[/tex] are the coordinates of the first point on line and

[tex](x_2,y_2)[/tex] are the coordinates of the second point on line

Given two points are:

(x1,y1) = (-2, 2)

(x2,y2) =(3, 4)

Putting the values in the formula

[tex]m = \frac{4-2}{3-(-2)}\\m = \frac{2}{3+2}\\m=\frac{2}{5}[/tex]

Hence,

The slope of the line that contains the points (-2, 2) and (3, 4) is 2/5.

A 26-by-27-inch sheet of paper is to be used for a poster, with the shorter side at the bottom. Find the width of the margins if the printed area is to be 360 in2.

Answers

Answer:

Step-by-step explanation:

Let the width of the margins as x.

So, we subtract 'x' width on each side of the paper.

So, length = 26-x-x= 26-2 x

Width = 27-x-x=27-2 x

Now, it is given printed area is 360

We can set up equation using length x width = Area

(26-2 x)(27-2 x) = 360

Multiply the left side using FOIL method,

702 -52  x-54 x+4 x^2 =360

Combine like terms

702-106x+4x^2=360

Subtract both sides 360

4x^2-106x+342 =0

Let's divide both sides by 2 to simplify

2x^2 -53x+171=0

Let's use quadratic formula to solve.

I'll upload the file for this.

There are two possible values for x.

Approximately x= 22.46 , x=3.76

Here x=3.76 works b

Which statement describes the​ y-intercept of the graph of a proportional​ relationship?
Choose the correct answer below.
A.
The line intersects the​ y-axis of the graph above the origin.
B.
The line intersects the​ y-axis of the graph at the origin.
C.
It is greater than the​ x-intercept of the line.
D.
It is equal to the​ x-intercept of the line.

Answers

Answer:

B i worked out all of them and only b can fit

The line intersects the​ y-axis of the graph at the origin. The correct option is B.

What is a Proportional Relationship?

A proportional Relationship is when a variable is in direct variation to another variable such that on increasing one the other proportionally increases.

The equation for a proportional relationship is

y ∝  x

y =kx

where k is the proportionality constant

The equation of a straight line is y = mx +c

here c is the intercept on the y-axis

Comparing the two equations, this can be confirmed that

c = 0

Therefore, the line intersects the​ y-axis of the graph at the origin.

The correct option is B.

To know more about Proportional Relationship

https://brainly.com/question/12917806

#SPJ2

A contestant on the biggest loser lost 78.8 pounds over a period of two months. At the end of the two month period, the contestant weighed 194.3 pounds. How much did the contestant weigh when the show began?

Answers

Answer: The contestant weighed 73.1 pounds when the show began.

Step-by-step explanation:

Given: A contestant lost 78.8 pounds over a period of two months.

At the end of the two month period, he weighed 194.3 pounds.

Initial weight = weight at the end of the two month period + weight lost by contestant

= 194.3 +78.8 pounds

= 273.1 pounds

Hence, the contestant weighed 73.1 pounds when the show began.


:( this is due by the end of the day! 20 points!! right answer please

Answers

Answer:

∠c=90°, ∠b=47.5°, a=85°

Step-by-step explanation:

∠c is inscribing a semicercle so is half of the intercepted arc and the whole circle is 360 , half will be 180 and the angle will be 90°

∠b is inscribing a 95°arc so is half of that 95/2=47.5°

arc a is part of a semicircle so is 180-95 =85°

brad wants to buy flowers for his friend with $39. The daisies are $1 each and the roses are $3 each. he buys 3 more daisies than roses. how much did the roses cost

Answers

Answer:9 roses

12 daisies

Step-by-step explanation:

pt2 please I will give you brainliest :/​

Answers

Answer:

I know that number four is A because the x repeats

Answer: The answer is that number four is A because the x repeats. (For both numbers.)

Step-by-step explanation:

What is the slope of the line below?

Answers

Answer:

The answer is the green answer choice which is 5/7.

Step-by-step explanation:

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