Can someone help me with these geometry proofs

She is right, however her explanation is wrong.

In order to find the unit price, you need to divide the amount by the cost.

You will then see that 12 divided by 2.39 < 18 divided by 3.39.

The smaller unit price is obviously the better buy.

Answer:

Simplify the expression.

Exact Form:

−1/625

Decimal Form:

−0.0016

Answer:

$0.21/lb

Step-by-step explanation:

We are to find the price per pound:

     Number of tons given  = 2 tons;

         1US ton contains 2000lb

         2 tons will have mass of 2 x 2000 = 4000lb

price  = $840

So';

          Price per pound  = [tex]\frac{840}{4000}[/tex]    = $0.21/lb

Answer:

2/3

Step-by-step explanation:

Pretty simple to find. Divide both the top and the bottom by 4, and see that it makes 2/3. Easy way to figure out any of these is just to simpliy them. Like 10/12 would equal 5/6

Answer:

The values of x that make the triangles congruent.

x = 6 and x = 3

Step-by-step explanation:

Given

Given that the triangles are congruent.

According to the SAS (Side-Side-Side)

AC = DC

AB = DB

so

AC = DC

substituting AC = 5x-2 and DC = 3x+10

5x-2 = 3x+10

5x-3x = 10+2

2x = 12

divide both sides by 2

2x/2 = 12/2

x = 6

and

AB = DB

substituting AB = 5x and DB = 4x+3

5x = 4x+3

5x-4x = 3

x = 3

Therefore, the values of x that make the triangles congruent.

x = 6 and x = 3

Answer:Option D

Step-by-step explanation:Can't be asked to explain.

Hope it helps :)

Answer:

D) y =   -2

The equation of the perpendicular line to the given line is  y = -2

Step-by-step explanation:

Explanation:-

Given point (-3,-2)

In graph the equation of line  x = 8 ( parallel to y- axis )

                              1 x + o y - 8 =0

The equation of the perpendicular line to the given line  

                        b x - a y + k =0

                       o x - 1 y + k =0 ...(i)

The equation (i) is Paases through the point ( -3,-2)

                        0 ( -3) -1(-2) + k =0

                               2 + k =0

                                     k = -2

∴The equation of the perpendicular line to the given line  is

     put k = -2 in equation (i)    

                        o x - 1 y + k =0

                      - y +(-2) =0

                       - y = 2

                         y = -2

Final answer:-

∴The equation of the perpendicular line to the given line is  y =-2

Answer:

x = (c - k) / 3

Can you insert an image or retype the question, it is hard to read with the information that is incorrectly placed.

Answer:

10

Step-by-step explanation:

i think its 10 maybe cuz if u see

the perimeter of a rectangular room is 52 feet. right?

then then height is 2 more than the width. what is the width of the room? so am I right copying the question? yes the question is right copied ok!

now see when u subtract 2 from 12 it gives u 10 and length i as 2 more than the width so maybe 10

Answer:

Their expenses and sales will both equal at 200 ounces.

Step-by-step explanation:

This can be determined using the break-even point in ounce formula as follows:

Break even point in ounce = Fixed cost / Contribution per ounce

Where;

Fixed cost = Advertising = $600

Contribution per ounce = Selling price per ounce - Cost per ounce = $4 - $1 = $3

Substituting the values into equation (1), we have:

Break even point in ounce = $600 / $3 = 200 ounces

Therefore, their expenses and sales will both equal at 200 ounces.

Answer:280

Step-by-step explanation:14 x 20 = 280

Answer:

235 cm

Step-by-step explanation:

First, find the area of the whole rectangle (bxh)

14x20=280

Next, find area of the missing piece

5x9=45 ( to find this, 14-9, times 20-11)

Finally, subtract the missing piece from the total rectangle

280-45=235

Answer:

Step-by-step explanation:

The equation of a line is y=mx+b

We currently have y=-2x-5, where the slope is -2

A parrallel line would have the same slope, so also -2

Any equation that has a slope, or m of -2 would be parallel!

I hope this helped! :)

Answer:

value of y is 4

Step-by-step explanation:

Answer:

The trucker was cited for speeding because his speed was above that of the speed limit of the toll road by 14.5mph

Step-by-step explanation:

Step 1

We calculate the speed of the trucker

Speed = Distance(miles)/Time(hours)

Distance = 159 miles

Time = 2 hours

Speed = 159 miles/2 hours

Speed = 79.5 miles per hour = 79.5 mph

From the question, we are told that: that toll road has a speed limit of 65mph

Step 2

We calculate the difference

= 79.5 mph - 65 mph

= 14.5 mph

Hence, the trucker was cited for speeding because his speed was above that of the speed limit of the toll road by 14.5mph

Answer:

y = - 3x + 11

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = [tex]\frac{1}{3}[/tex] x - 3 ← is in slope- intercept form

with slope m = [tex]\frac{1}{3}[/tex]

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{\frac{1}{3} }[/tex] = - 3, then

y = - 3x + c ← is the partial equation

To find c substitute (3, 2) into the partial equation

2 = - 9 + c ⇒ c = 2 + 9 = 11

y = - 3x + 11 ← equation of perpendicular line

Answer:

99

Step-by-step explanation:

Given the linear equation:

y = 0.6x + 45

x = outdoor temping degrees ; y = number of pair of sandal sold

Number of pairs of sandals the company expect to sell if the outside temperature is 90 degrees?

y = 0.6(90) + 45

y = 54 + 45

y = 99

The expected number of sandals to sale will be 99

Answer:

f^-1 (x) = 2X + 8

Step-by-step explanation:

Let's make f(x) = y

Y = X/2 - 4

So to find the inverse, switch the y with the x like so:

X = Y/2 - 4 (isolate the Y value)

X + 4 = Y/2 (multiply both sides by 2)

2(X + 4) = Y

Y = 2X + 8

So f^-1 (x) = 2X + 8

Complete Question

Oh sunday sheldon bought 4 1/2 kg of plant food,he used 1 2/3 kg on his strawberry plants and used 1/4 kg on his tomato plant.How many kg of palnt food did sheldon have left?

Answer:

2 7/12 kg

Step-by-step explanation:

Oh sunday sheldon bought 4 1/2 kg of plant food,he used 1 2/3 kg on his strawberry plants and used 1/4 kg on his tomato plant.How many kg of palnt food did sheldon have left?

Step 1

We add up the kg of plant food that he used

He used 1 2/3 kg on his strawberry plants and used 1/4 kg on his tomato plant.

The total amount of plant food that he used = 1 2/3 kg + 1/4 kg

Lowest Common Denominator 12

1 + (2/3 + 1/4)

1 + (8 + 3/12)

1 11/12 kg of plant food

Hence he has used 1 11/12 kg of plant food

Step 2

The amount of plant food that he had left is calculated as:

Amount of plant food Sheldon bought - Amount of plant food he used

Amount of plant food Sheldon bought = 4 1/2 kg

The amount of plant food that he had left = 4 1/2 kg - 1 11/12

4 - 1 + (1/2 - 11/12)

Lowest common denominator = 12

3 + ( - 5/12)

= 2 7/12 kg

Therefore, the kg of plant food that sheldon had left = 2 7/12 kg

Answer:

120 m^2

Step-by-step explanation:

6*2=12 for each narrow piece of the rectangular prism and since there are four multiply 12 times 4. Use the equation 6*6=36 for each of the larger sides and multiply 36 by 2 because there are only two large sides.

Incomplete question. I provided an explanation about the term, "business model."

Explanation:

Usually, when mention is made of the term business model it simply refers to the decided way a business plans to make profits.

In other words, it includes information about services or products to be offered by the business in other to keep the business alive, but not just been alive but to continue growing profit-wise.

Hence, we can say, Henry's business model should contain information about the dog charges which would be profitable to his business.

Answer:

12 and 4

Step-by-step explanation:

We could set up two equations with the given information.

Let a be the larger number, and b be the smaller number.

4b - 4 = a (Four subtracted from four times the smaller is equal to the larger number.)

2a = 6b (Twice the larger number equals six times the smaller number.)

With the 1st equation, we could substitute a = 4b - 4 into the second equation.

We get

2(4b-4) = 6b

8b - 8 = 6b

2b = 8

b = 4

Substituting back into the first equation,

a = 4(4) - 4 = 12

Therefore the two numbers are 12 and 4.

the answer is four and twelve

Answer:i took this test so i’m pretty sure it’s c and f

Step-by-step explanation:

Answer:

μₓ = 36,000 dollars

σ ₓ= 1,000 dollars

Step-by-step explanation:

to find μₓ = 36,000 dollars:

Look in the question, it states that the mean is $36,000.

to find σ ₓ= 1,000 dollars:

[tex]\frac{3000}{\sqrt{9} } = 1000[/tex]

The mean and standard deviation of the sampling distribution is $36000 and $1000.

What is Standard Deviation?

The term "standard deviation"  refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.

Given:

The mean and the standard deviation of the sampling distribution of the sample mean:

Mean, [tex]\mu[/tex] = $36000

[tex]\sigma[/tex] = 3000

n = 9

So, standard deviation of the sampling distribution

=  [tex]\sigma[/tex] / √n

= 3000 / √9

= 3000/3

= 1000

Hence, Mean = $36,000 and standard deviation = $1000.

Learn more about Standard deviation here:

https://brainly.com/question/21274500

#SPJ5

Answer:

i believe the answer 602

Step-by-step explanation:

tell me if im wrong but hoped I helped:)

Answer:

602

Step-by-step explanation:

hope it helps

Answer:

9.8

Step-by-step explanation:

The crew worked for 4 1/5 days

They built 2 1/3 kilometres of road each day

Therefore the total length of the road can be calculated as follows

= 4 1/5 × 2 1/3

= 21/5 × 7/3

= 147/15

= 9.8

Hence the length of the road is 9.8 kilometres

Step-by-step explanation:

Volume of cylinder

πr²h = π×(12)²×(18)

Choco : Vanilla : Strawberry

3 : 2 : 1

to find volume of strawberry,

[tex] \frac{1}{6} \times volume \: of \: cylinder[/tex]

then use your calculator

Answer:

5/8

Step-by-step explanation:

Aquí, queremos encontrar la suma al infinito de la progresión geométrica, dado el primer término y la razón común Matemáticamente, eso sería;

S = a/1-r

S = 1/2/(1-1/5)

S = 1/2/4/5

S = 1/2 * 5/4

S = 5/8