Eli's bedroom door is 9 feet tall and 3 feet wide. A new door is $4.00 per square foot. How much would a new bedroom door cost in total

Answer:

n = 2 and a = - 4

Step-by-step explanation:

(1)

- 4n - 8 = 4(- 3n + 2) ← distribute parenthesis

- 4n - 8 = - 12n + 8 ( add 12n to both sides )

8n - 8 = 8 ( add 8 to both sides )

8n = 16 ( divide both sides by 8 )

n = 2

(2)

a - 15 = 4a - 3 ( subtract a from both sides )

- 15 = 3a - 3 ( add 3 to both sides )

- 12 = 3a ( divide both sides by 3 )

- 4 = a

Answer:

Step-by-step explanation:

C)  3X

Answer: C. 3x

Step-by-step explanation:

Since x and 3x both have x, you can add them together to get 4x (if there is x by itself, it really means that there is one of it, so it would be 1x.)

Then, you subtract 7x by 4x, which gives you the answer, 3x. You could also solving it by asking yourself: What number plus 4x equals 7x, which would give you 3x.

Answer:

A

Step-by-step explanation:

The dot at A is an outlier because it is far outlying the skewed pattern of the data, and is basically isolated from the rest of the data.

Answer:

Before Tax Price: $28.00

Sale Tax: 8.00% or $2.24

After Tax Price: $30.24

heart if it helped you

Answer:

1)50.24 2) 254.34

Step-by-step explanation:

Answer:

y = 4.

Step-by-step explanation:

I suppose that this question relates to the image that can be seen below.

In the image, the green line represents the exponential function and the blue line represents the linear function.

The y-value after which the exponential function will always be greater than the linear function is the y-value where bot graphs intersect, such that after that point, the blue line starts increasing fast, and is always above the green line.

In this case, this point is the second intersection, and we can see that this intersection happens in the point (2, 4)

Remember that the usual notation for points is (x, y).

Then the y-value after which the exponential function will always be greater than the linear function is y = 4.

Answer:

4

Step-by-step explanation:

I used a calculator

Answer:

area of triangle=1/2×base×height

area of triangle =1/2×4×2

area lf triangle =4 unit²

Answer:

Joe

Step-by-step explanation:

Strat: Solve both for 1 hour. 48/3=16(Ron)

34/2=17(Joe)

Step-by-step explanation:

how do you write an equation for the graph of y=cos x translated up 2 units and left pi units

Answer:

14/24 ( simplified = 7/12)

Step-by-step explanation:

to find this we multiply the fractions 2/3 and 7/8

7/8 x 2/3 = 14/24

So Shannon ate 14/24 lb

You can simplify to = 7/12

Answer:

$12.50

Step-by-step explanation:

100%-20% -> $10

80% -> $10

100% -> [tex]\frac{100}{80}[/tex] × $10 = $12.50

Answer:

The original price was $12

Answer: y^2 -5 + y^2 -5 + 3y^2+7y+8 + 3y^2+7y+8

Step-by-step explanation: The order doesn't matter but... its just the sides added up together. Its a rectangle so the opposites are equal. You were given 2 sides and thats all you need, just repeat it. L plus l plus w plus w is there.

Answer:

P= 8y^2+14y+6

Step-by-step explanation:

Multiply the given expressions by 2.

Then add your two products together.

Answer:

96 windows

Step-by-step explanation:

[tex]\frac{32}{2} =\frac{x}{6} \\\\2x=192\\x=96[/tex]

Answer:

96

Step-by-step explanation:

Answer:

9/10y

Step-by-step explanation:

Somewhat inconclusive hope this helps!

Answer:

[tex]\frac{9}{10} y[/tex]

Step-by-step explanation:

[tex]\frac{2}{5}y +\frac{1}{2} y\\\\\frac{4}{10}y +\frac{5}{10} y\\\\\frac{9}{10} y[/tex]

Answer: if you're solving by x it would be x=43/2

Step-by-step explanation:

the slopes of the sides do not matter. It's the fact that AD and BC are parallel and AB and DC are NOT parallel that determines it to be a trapezoid.

Answer:

Yes

Step-by-step explanation:

I believe it would be :) sorry if it's wrong I'm just a 8th grader

Answer:

1. 14m, 11, 18m

2. 132 (rounded from 131.946)

3. Quadrilateral (duh it has 4 sides) and a rhombus?

Step-by-step explanation:

1 a unique triangle is a triangle with side lengths that are ALMOST exactly like a triangle. I used the pyragothem theory (a^2 + b^2 equals c^2) and this one was soo close to 18 (17.8)

2 the equation for the circumference of a circle is C=dpi. the radius is half of the diameter so 21 time 2 is 42 then multi[ply by pi.

3 is definitely already a quadrilateral (all of them have 4 sides) and the only shade i can think of that can have a 130 degrees for 2 angles would be a longgg rhombus ( or diamond)

G

Solution:

Here,

y+2x=2

y=2-2x

Now,

Putting the value of y

y+4x=0

2-2x+4x=0

2+2x=0

2(1+x)=0

1+x=0

x=-1

Then,

Putting the value of x

y=2x-2

=2×-1-2

=-2-2

=-4

Hence,the solution is (-1,-4)

Answer:

the slope of the line is .5

Step-by-step explanation:

start at point a and rise 1 and run 2 to point d which makes the slope 1/2

Answer:

5/6

Step-by-step explanation:

mental math

Answer:

the answer is d 41

Step-by-step explanation:

Answer:

92

Step-by-step explanation:

92+88= 180 all suplementtary angles =180

Answer:

92

Step-by-step explanation:

∠X And ∠Y are supplementary.

• Measure of ∠Y = 88°.

• We have to find measure of ∠X.

• Sum of 2 supplementary angles is always = 180°.

  X+Y=180

X+88=180

X=180-88

X=92

Answer:

$15 for 5 cupcakes

Answer:

ST = 44.5 feet

Step-by-step explanation:

sing SOH CAH TOA to solve the problem;

Given

m<T  = 90

m<R = 39 degrees

TR = 55feet

Required

ST = opposite to m<R

TR is the adjacent

tan theta = opp/adj

tan m<R = ST/TR

tan 39 = ST/55

ST = 55tan39

ST  = 55*0.8098

ST = 44.5 feet

Answer:

B: 13000 m²

Step-by-step explanation:

To find how much wood is used, we will have to find the surface area of the wooden building.

Formula for surface area of a rectangular pyramid is;

SA = lw + l√(h² + w²/4) + w√(h² + l²/4)

We are given;

l = 100 m

w = 50 m

h = 40 m

Thus;

SA = (100 × 50) + 100√(40² + 50²/4) + 50√(40² + 100²/4)

SA = 5000 + 4717 + 3201.56

SA = 12918.56

Approximating to 2 significant figures gives;

SA = 13000 m²

Answer:

f(2)= -4 f(3)= 1

Step-by-step explanation:

Answer:

[tex]10000[/tex] meters

Step-by-step explanation:

The formula for finding distance is ([tex](speed)*(time)=(distance)[/tex]). Substitute in the given values and solve to find the distance,

[tex](20)*(500)=10000[/tex]