Which of the following is a proportion? Please help!! D:

Answer:

actual length = 171.67 ft.

Step-by-step explanation:

scale of school bus drawing is 12 in. to 5 ft.

if the length of a school bus drawing is 412 in.

                                                     5 ft

the actual length is    = 412 in x --------

                                                     12 in

actual length = 171.67 ft.

The required actual length of the bus is 171.7 feet.

Given that,
A scale drawing of a school bus has a scale of 12 inches to 5 feet.
The length of the school bus is 412 inches on the scale drawing,
To determine the actual length of the bus.

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,

here,
Scale given,
12 inches = 5 feet
1 inch = 5 / 12 feet
Now on the drawing, the length of the bus is 412 inches,
Now,
the actual length of the bus is,
= 412 * 5 / 12
= 171.7 feet

Thus, the required actual length of the bus is 171.7 feet.

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Answer:

The answer is 3,150

Step-by-step explanation:

You multiply 1350 with 7 and divide it by 3 and you get 3,150 as your answer.

s=450t is the  equation that represents this direct variation.

The length along a line or line segment between two points on the line or line segment.

Given that the distance a jet travels (d) varies directly with the number of hours (t) flown.

A  jet travels 1,350 miles in three hours.

Distance is one thousand three hundred fifty and the time is three hours.

The speed is 1350/3 which is equal to four hundred fifty.

We need to write the equation that represents this direct variation.

s=450t

Hence, s=450t is the  equation that represents this direct variation.

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Answer:

13 y^2 - 13 y + 11

Step-by-step explanation:

Simplify the following:

15 y^2 - 2 y^2 + 2 y - 15 y + 4 + 7

Grouping like terms, 15 y^2 - 2 y^2 + 2 y - 15 y + 4 + 7 = (15 y^2 - 2 y^2) + (-15 y + 2 y) + (7 + 4):

(15 y^2 - 2 y^2) + (-15 y + 2 y) + (7 + 4)

15 y^2 - 2 y^2 = 13 y^2:

13 y^2 + (-15 y + 2 y) + (7 + 4)

2 y - 15 y = -13 y:

13 y^2 + -13 y + (7 + 4)

7 + 4 = 11:

Answer: 13 y^2 - 13 y + 11

Answer:

Dollars per hour is $10 and hours per dollar is 6 minutes 15 seconds.

Step-by-step explanation:

Dollars per hour represents how much she earns for each hour of work. Hours per dollar represents how much she works to earn $1.

It is stated that Mariah earns $10 for each hour of work at the movie theater.

This is the "dollars per hour" rate since the base is 1 hour.

This means that she earns 10/60 = $0.16 for every minute she works at the theater. If we divide 1 by this number we find 1/0.16 = 6.25.

This is the minutes she has to work to earn $1. So her hours per dollar rate is 6.25 minutes which is 6 minutes 15 seconds.

I hope this answer helps.

Word Forms

40,000=forty thousand

600=six hundred

8=eight

0.9=zero and nine tenths

100,000=one hundred thousand

70,000=seventy thousand

5,000=five thousand

300=three hundred

80=eighty

0.4=zero and 4 tenths

Figure Forms

40,000=400 squares (hundreds)

600=6 squares (hundreds)

8=8 little squares (ones)

0.9=9 lines (tenths)

100,000=100 squares (hundreds)

70,000=70 squares (hundreds)

5,000=50 squares (hundreds)

300=3 squares (hundreds)

80=8 lines (tens)

0.4=4 lines (tenths)

♡ Hope this helps! ♡

❀ 0ranges ❀

Answer:

h²=b²+p²

x²= 9²+23²

x²= 81+529

x²=610

X= √610

Answer:

896 in.^3

Step-by-step explanation:

Find the volume of each prism, and add the two volumes together.

V = BH

Upper prism:

Vupper = (1/2)bhH = (1/2)(6 in.)(12 in.)(14 in.)

Vupper = 504 in.^3

Lower prism:

Vlower = (1/2)bhH = (1/2)(7 in.)(8 in.)(14 in.)

Vlower = 392 in.^3

Volume = Vupper + Vlower

Volume = 504 in.^3 + 392 in.^3

Volume = 896 in.^3

Answer: 896 ci

Step-by-step explanation:

Answer:

2.8, 4.6, 7, 17

Step-by-step explanation:

Answer:2.8,4.6,7,17

Step-by-step explanation:So you see the decimal you find the smallest number that is a decimal and that is your least decimal. And then you find the next smallest number and keep going up to the biggest number on the least to greatest.

Answer:

D

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 )

Here m = - 3, thus

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

To find c substitute (2, - 5) into the partial equation

- 5 = - 6 + c ⇒ c = - 5 + 6 = 1

y = - 3x + 1 → D

The equation of the line is y=-3x+1. Therefore, option D is the correct answer.

Given that, the coordinate point is (2, -5) and the slope m is -3.

The equation of a line can be written many different ways, and each of these ways is valid. The slope-intercept form of a line is a way of writing the equation of a line so that the slope of the line and the y-intercept are easily identifiable. The slope is the steepness of the line, and the y-intercept is the place the line crosses the y-axis.

Put (x, y)=(2, -5) and m=-3 in y=mx+c, we get

-5 = (-3)(2) + c

⇒ c = 1

Substitute m=-3 and c=1 in y=mx+c, that is

y=-3x+1

The equation of the line is y=-3x+1. Therefore, option D is the correct answer.

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Answer:

f(-2) = 4

Step-by-step explanation:

The function has three definitions depending on the value of x.

You are looking for the value of the function at x = -2.

-2 is in the interval x <= -1, which is the first line of the definition of the function.

We use the first line of the definition of the function.

f(x) = -2x for x <= -1

f(-2) = -2(-2) = 4

Answer: f(-2) = 4

Answer:

#2 y=3/2x-3 #4 y=3/1x-5

Step-by-step explanation:

y=mx+b

b=y-intercpet

where on the why axis does it touch?

m=slope

rise over run

slants right positive

slants left negative

Answer: Each woman sold her apples at the rate of seven apples for I¢, and 3¢ each for the odd ones which were left over. this made it possible for each to receive the same amount, which is 20¢.

Step-by-step explanation:

given data:

20,

40,

60,

80,

100,

120,

140.

solution.

first woman 20 apples

= 2 + 3 * 6¢.

= 20¢.

second woman 40 apples

= 5 + 5 * 3¢.

= 20¢.

third woman 60 apples

= 8 + 4 * 3¢.

= 20¢.

fourth woman 80 apples

= 11 + 3 * 3¢.

= 20¢.

fifth woman 100 apples

= 14 + 2 * 3¢.

= 20¢.

sixth woman 120 apples

= 17 + 1 * 3¢.

= 20¢.

seventh woman 140 apples

= 20 * 1¢.

= 20¢.

Answer:

c)$73

Step-by-step explanation:

You just have to substitute 4 in for h because h stands for how many hows. They're renting it for 4 hours.

Answer:

c) 73

Step-by-step explanation:

c=12(4 hours) + 25

c=48 + 25

c=73

Answer:

Real numbers include both Rational and Irrational number sets.

Rational and Irrational numbers sets are independent from each other.

See the diagram attached.

Answer:

c.

Step-by-step explanation:

Answer:

The associative and commutative properties can be applied only to problems with addition. Juan had to change the subtraction to addition by adding the additive inverse.

Step-by-step explanation:

Answer: x=24

Step-by-step explanation:

step 1: remove parenthesis  x+x+1+x+2=75

step 2: collect like terms 3x+3=75

step 3: move the constant to the right side of equation 3x=75-3

step 4: subtract 3x=72

step 5: divide both sides by three to get x by itself x=24

Answer:

7.33333333333

Step-by-step explanation:

3x - 7 = 15

3x = 15 + 7

3x = 22 (divide both sides by 3 to get x)

3x/3 = 22/3

x = 7.33333333333

Hope it helped u if yes mark me BRAINLIEST!

Tysm!

:)

Answer:

Step-by-step explanation:

[tex]3x+7=15\\\\\mathrm{Subtract\:}7\mathrm{\:from\:both\:sides}\\\\3x+7-7=15-7\\\\Simplify\\\\3x=8\\\\\mathrm{Divide\:both\:sides\:by\:}3\\\\\frac{3x}{3}=\frac{8}{3}\\\mathrm{Simplify}\\\\x=\frac{8}{3}[/tex]

Answer:

tan ∠ABC=[tex] \frac{3}{5} [/tex]

Step-by-step explanation:

Please see attached picture for full solution.

Answer:

p = -2, r = -2 and p-r =  0.

Step-by-step explanation:

(x - 1/2)(x - 2)

= x^2 - 2x - 1/2x + 1

= x^2 - 5/2x + 1

= 2x^2 - 5x + 2

= -2x^2 + 5x - 2

Comparing this with

px^2 + 5x + r

we see that  p = -2, r = -2 and p-r =  0.

Answer:

B

Step-by-step explanation:

A] You download 2 songs.

B] You download 2 movies.

C] You download 1 song and 1 movie.

D] You don't have enough money for 2 downloads.

x= number of movies downloaded

g(x) = total cost in dollars.

From g(x)=x

There is a slope of 1

That is, the movies cost $1 per movie.

It is a proportional relationship because of the absence of y-intercept

f(x) has a slope of (1/2) and y-intercept $2

f(x) = (1/2)x + 2 is the function for the cost of downloading music.

When we get to 3 downloads,

f(3)=g(3) and above, music downloads will be cheaper because they only cost 1/2 dollar for each additional movie compared to $1 for each movie.

For 2 movie downloads

we have,

f(2)=3

g(2)=2

So, downloading two movies will be cheaper.

One of each costs $1 + $2.50,

more than either of the other choices.

Answer:

Cost of meat = $15

Step-by-step explanation:

Given:

Pepperoni costs = $3.50

Parma ham costs = $6.50

Total spend = $25

Find:

Cost of meat

Computation:

Cost of meat = Total spend - Pepperoni costs - Parma ham costs

Cost of meat = $25 - $6.50 - $3.50

Cost of meat = $15

Step-by-step explanation:

the formulae for finding centroid is (x1+x2+x3/3 , y1+y2+y3/3)

so the coordinates of centroid is (1+3+5/3 , -2+5-6/3)

(3,-1) and other point is the origin (0,0)

we know ,the equation is

x-x1/x1-x2= y-y1/y1-y2

x-3/3-0= y-(-1)/-1-0

x-3/3=y+1/-1

-x+3=3y+3

or -x+3y=0

or x-3y=0(multiplying -1 in both sides)

so the eq is x-3y=0 ans

thank u

-25 + 15 = -10

1 - 13 = -12

-1 divided by 5 = -1/5

-5 multiplied by -1/5 = 1

The bold ones are the answers

Answer:

Step-by-step explanation:

1) n+15=10

     solution;

n+15= -10

so, n= -10 -15

      n= -25

2) n-13= -12

        solution;

remember the rule i told you in number 1 that's the same rule we will use here

n= -12+ 13

n=1

you see so easy... lets continue

3) n\5= -1\5

now in this one there is a new rule which is; when you see two fractions and there is an equal two in between them you cross multiply... okay lets solve

n\5= -1\5

-1*5=n*5

the reason why i exchanged was because the unknown should always be at the left hand side....okay

n*5=-1*5

5n/5= -5/5

5 will divide 5 which is remaining n

5 divide 5 which is -1

so n = -1

4) -5n =1

 this is not a fraction so we just take the -5 to 1 and no cross multiplication (they are whole numbers so they meet each other)okay...

so, n=1/-5

Answer:

it is discontinuety bcz at 1,4 and 6 it is discontinued

Answer:

4 protons

Step-by-step explanation:

because protons are positive and the ion has a negative charge

Answer:

1). Rational

2). Irrational

3). Rational

4). Rational

5). Irrational

Step-by-step explanation:

To solve this question we should follow the rule,

"Addition of rational and an irrational number is an irrational number."

1). [tex]\sqrt{16}=4[/tex] (rational number)

   [tex]-\frac{21}{5}[/tex] (negative rational number)

   [tex]\sqrt{16}-\frac{21}{5}=4-\frac{21}{5}[/tex]

                  [tex]=-\frac{1}{5}[/tex] [rational number]

2). π → (Irrational number)

   24 → (rational number)

   π + 24 → (Irrational number)

   Since addition of a rational and an irrational number is an irrational number.

3). [tex]\sqrt{4}[/tex] = 2 (rational number)

     5 (rational number)

    2 + 5 = 7 (rational number)

4). [tex]\sqrt{36}=6[/tex] (rational number)

   [tex]\sqrt[3]{27}=3[/tex] (rational number)

    [tex]\sqrt{36}+\sqrt[3]{27}=9[/tex] (rational number)

5). [tex]\frac{3}{4}[/tex] (rational number)

   [tex]\sqrt{27}[/tex] → (Irrational number)    

   [tex]\frac{3}{4}+\sqrt{27}[/tex] → (Irrational number)

Answer:

3 feet

Step-by-step explanation:

Initial depth = 16 feet

Then:

Answer:

Step-by-step explanation:

a) (-2x³ + x - 5)(x³ - 3x - 4)

= (-2x³) (x³ - 3x - 4) + x(x³ - 3x - 4)  - 5(x³ - 3x - 4)

= -2x³*x³  - (-2x³)*3x - (-2x³)*4 + x*x³ - x*3x - x*4 + x³ * (-5) - 3x*(-5) -4*(-5)

=  -2x⁶ + 6x⁴ + 8x³ + x⁴ - 3x² -4x - 5x³ + 15x + 20  {add like terms}

= -2x⁶ + 6x⁴ + x⁴ + 8x³ - 5x³ - 3x² - 4x + 15x + 20

= -2x⁶ + 7x⁴ + 3x³ - 3x² + 11x + 20

Hint: When multiplying two terms, multiply the coefficient, and add the powers of the variables {[tex]a^{m}*a^{n}=a^{m+n}[/tex] }

-2x³*x³ = (-2*1) * [tex]x^{3+3}[/tex] = -2x⁶

b) Yes , same because of commutative property of multiplication

Answer:

[tex]-2x^6+7x^4+3x^3-3x^2+11x+20[/tex]

Step-by-step explanation:

a) We can expand [tex](-2x^3 + x - 5) (x^3 - 3x - 4)[/tex], getting [tex]-2x^6+6x^4+8x^3+x^4-3x^2-4x-5x^3+15x+20[/tex]. We can then combine like terms, getting [tex]-2x^6+7x^4+3x^3-3x^2+11x+20[/tex].

b) Yes it is the same, as it doesn't matter the order if you multiply two polynomials. It will always be the same.

Answer:

280 pages

Step-by-step explanation:

There are 14 days in 2 weeks  ( 7 days in  1 week )

20 pages a day * 14 days = 280 pages

Answer: David reads 280 pages altogether.

Step-by-step explanation: If David reads 20 pages a day, and there are 7 days in a week, then he will read 140 pages in one week (20 x 7). Since the problem asks for how many pages he read in two weeks, then you can multiply 140 by 2 and get 280, which is your answer. Hope this helped :)