Mathematics College

A model train is in a 3 inches to 80 inches scale. If the model door is 4 inches how tall is the real train door?

Answers

Answer 1

Answer:

Step-by-step explanation:

Related Questions

Please help! it's algebra 2! correct answers only!

Answers

To create a square trinomial on the left side of the equation, find a value that is equal to the square of half of.

Which of these isn't a proportional relationship? 15:30 & 1:2 3:9 & 9:27 05.10 & 10:20 2:4 & 4:2

Answers

Answer:

4:2

Step-by-step explanation:

What is the K for this story Problem? John bought 27 baseball cards for $9. How many baseball cards can he buy with $84?

Answers

Answer:

210

Step-by-step explanation:

9 divided by 27 = .33333 = .4

you would divide 9 by 27 because if you did 27 divided by 9 he would only have 3 cards

84 divided by .4 = 210

A store owner recorded the number of tickets sold each hour. The graph shows some of the store owner's data. What is the slope of
the line shown?

A) 1

B) 2

C) 4

D)1/2

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G where is the slope no photo no answer

The table shows values of n and f(n) for the equation f(n) =
n(n+3)
2.
f(n)
1
2
2
5
3
9
4
?
What is the value of f(n) when n =
= 42
A 12
B. 13
C. 14
D. 28
E

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I looked at the the picture and the answer is A. 12

I guess the 2 was supposed to be a question mark judging by the picture...

i need help with this pls

Answers

Answer:

8x + 12 + 2x + 28 = 180

x = 14

Step-by-step explanation:

8x + 12 + 2x + 28 = 180

8x + 2x + 12 + 28 = 180

10x + 40 = 180

-40 -40

10x = 140

10 10

x = 14

any more help just ask :)

Please help me answer!

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Answer:

..................

the answer to that is b y=2x-3

8. Find y
(9x + 37) (7y-1)
16x+8)° (11y+19)

Answers

Answer:

6 plus 9

Step-by-step explanation:

A house has increased in value by 36 percent since it was purchased. If the current value is 306000 what was the value when it was purchased?

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Answer:

$225,000

Step-by-step explanation:

Step-by-step explanation:

To calculate the percentage change we will apply the formula:

p= N-O/O *100

p is the increased percentage

N is the current value

O is the old value.

Substitute the values in the formula:

36 = 306,000 - O/O *100

Divide both the sides by 100

36/100 = 306,000 - O/O *100/100

36/100 = 306,000 - O/O

Now multiply O at both sides

36/100 * O = 306,000-O/O * O

At R.H.S O will be cancelled by O

At L.H.S 36/ 100 = 0.36

0.36 O= 306,000-O

Combine the like terms:

0.36 O+O =306,000

1.36 O = 306,000

Divide both the terms by 1.36

1.36 O/ 1.36 = 306,000/1.36

O= $225,000

Therefore when the house was purchased its value was $225,000....

Look at pic and answer ASAP

Answers

The one u got chosen already :)

Answer:

the second one, the one that is already highlighted is correct.

Step-by-step explanation:

she divided it up among them so 20 over x shows division

what is 5,300 rounded to the nearest thousand

Answers

Answer:

5,000

Step-by-step explanation:

Which expression represents the sum of 8 and twice a number??

A: 8+n

B: 8×2n

C: 8+2n

D: 2×(8+n)

Answers

Answer:

Step-by-step explanation:

Answer:

that means 2 × (8 + n)

then that will be the expression used

13. solve
(1 Point)
m/18 = - 1/9

a.) m = -3
b.) m = -4
c.) m = -2
d.) m = -1

Answers

Answer:

m = -2

Step-by-step explanation:

m/18 = - 1/9

m = -1/9 * 18

m = -2

There was a study done on oxygen consumption of snails as a function of pH, and the result was a degree 4 polynomial whose graph is shown.

Which of the following statements about this function is INCORRECT?

Answers

Answer:

A. There is a positive leading coefficient

Step-by-step explanation:

Polynomials can be represented as an equation or graphs.

The incorrect option is: (b) There is a positive leading coefficient.

The polynomial has a degree of 4; this means that the degree of the polynomial is even.

So option (a) The degree of the polynomial is even is true

From the graph, we can see that the function decreases at (7<x<8) and (9<x<10)

This means that, the function decreases at two intervals

So option (d) There are two intervals where the function is decreasing is also true

Also, the function is at maximum at x = 7 and x = 9.

This means that:

Option (c) At two pH values, there is a relative maximum value

Hence, the incorrect option is:

(b) There is a positive leading coefficient.

This is so because, the graph decreases at some points on the graph.

This means that, the graph has a negative leading coefficient.

Answers

Answer:

The expected value of the sum of three numbers chosen out of 10 numbers will be 16.5.

Step-by-step explanation:

Felicia has a stack of 10 cards with number 1,2,3,4,5,6,7,8,9,10

Selecting 3 cards out of 10

10C3 = 120

Now she picks three cards to look at their numbers and sum it up

The possible three numbers are

(1 2 3), (1 3 2), (2 1 3) ,(2 3 1), (3 1 2), (3 2 1) ,(1 2 4), (1 4 2), (2 1 4), (2 4 1),

(4 1 2)│(4 2 1), (1 2 5), (1 5 2)│(2 1 5), (2 5 1) ,(5 1 2), (5 2 1), (1 2 6), (1 6 2), (2 1 6), (2 6 1), (6 1 2) ,(6 2 1) ,(1 2 7), (1 7 2) ,(2 1 7), (2 7 1), (7 1 2), (7 2 1), (1 2 8), (1 8 2), (2 1 8) ,(2 8 1), (8 1 2) ,(8 2 1), (1 2 9), (1 9 2), (2 1 9), (2 9 1), (9 1 2), (9 2 1),

(1 2... …, (6 10 8), (8 6 10), (8 10 6), (10 6 8), (10 8 6), (6 9 10), (6 10 9), (9 6 10),

(9 10 6), (10 6 9), (10 9 6), (7 8 9), (7 9 8), (8 7 9), (8 9 7), (9 7 8), (9 8 7), (7 8 10),

(7 10 8), (8 7 10), (8 10 7), (10 7 8), (10 8 7), (7 9 10), (7 10 9), (9 7 10), (9 10 7),

(10 7 9), (10 9 7) , (8 9 10), (8 10 9), (9 8 10), (9 10 8), (10 8 9), (10 9 8)

Now we sum it all up so minimum sum can be 1+2+3 = 6 andthe maximum can be 8+9+10 = 27

Let S denote the sum of the three numbers that are chosen and P(S=k) denotes its probability

P(S=6)=1/120

P(S=7)=1/120

P(S=8)=1/60

P(S=9)=1/40

P(S=10)=1/30

P(S=11)=1/24

P(S=12)=7/120

P(S=13)=1/15

P(S=14)=3/40

P(S=15)=1/12

P(S=16)=1/12

P(S=17)=1/12

P(S=18)=1/12

P(S=19)=3/40

P(S=20)=1/15

P(S=21)=7/120

P(S=22)=1/24

P(S=23)=1/30

P(S=24)=1/40

P(S=25)=1/60

P(S=26)=1/120

P(S=27)=1/120

Now adding all the sum in order to get the expected value

∑(K=6 to 27) k*P(S=k) = 33/2 = 16.5

Therefore the expected value of the sum is 16.5.

1000¥ (Japanese Yen) is equivalent to $8.00. A shirt costing 650¥ would cost how many dollars? *

$6.50
$12.30
$5.20
$8.13

Answers

Answer:

$5.20 (Have a good day)

Step-by-step explanation:

Answer:6.50

Step-by-step explanation:

Nikki drew a rectangle with a perimeter of 18 units on a coordinate grid. Two of the vertices were (4, –3) and (–1, –3). What could be the coordinates of the other two vertices of the rectangle?

A. (4, 12) and (–1, 12)
B. (–1, 1) and (4, 1)
C. (4, 6) and (–1, 6)
D. (4, 7) and (–1, 7)

Answers

Step-by-step explanation:

I have read about this in my class

Answer:

ITS a.

Step-by-step explanation:

Which equations could you solve using the addition property of equality? Check all that apply.
4+ y = 100
y -4 = 100
4y = 100 4 + 100=y
100 = y - 5

Answers

Answer:

4 + y = 96 = 100

y = 104 - 4 = 100

4 y = 25 = 100 4 + 100 = y = 104

100 = y = 105 - 5

Step-by-step explanation:

Plz mark me as brainliest have a good day

The equations could you solve using the addition property of equality is

y- 4 = 100.

We have to apply the property of addition equality

Now,

4 + y = 100

y= 96

and, y -4 = 100

y = 104

and, 4 y = 100

y= 25

and, 100 = y - 5

y= 105

Thus, the required equality is y- 4 = 100.

Learn more about Addition Equality here:

https://brainly.com/question/27281756

#SPJ2

What is measure of arc NP?

Answers

Are you learning how to arc things

Is 7:12 greater than less than or equal to 1:5

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its greater because 7/12= 0.583... and 1/5= 0.2

please help me w this

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Answer:

Step-by-step explanation:

f(x)=x^2+2x-1
find f(-3)

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Answer:

Step-by-step explanation:

HELP ME PLS :(

Janis is 65 inches tall. What is her height in centimeters? (2.54 cm = 1 inch)

Answers

Answer:

I think the answer 165.1 cm tall

Step-by-step explanation:

multiply 2.54 by 65

Answer:

165.10cm

Step-by-step explanation:

i think so

Question 25
A stock has a beta of 1.5 and an expected return of 16.35%. What is the risk-free rate if the market rate of return is 12.5%?
96

Answers

Answer:

4.8%

Step-by-step explanation:

Given that :

Stock beta (B) = 1.5

Expected return = 16.35% = 0.1635

Maeket rate of return (Rm) = 12.5% = 0.125

Risk-free rate of return (Rf) =?

Using the relation :

Expected rate of return = risk free rate + Beta(market rate - Risk-free rate)

Expected rate of return = Rf + B(Rm - Rf)

Plugging our values :

0.1635 = Rf + 1.5(0.125 - Rf)

Open the bracket

0.1635 = Rf + 0.1875 - 1.5Rf

Collect like terms

0.1635 - 0.1875 = Rf - 1.5Rf

−0.024 = - 0.5Rf

Divide both sides by - 0.5

0.024 / 0.5 = Rf

Rf = 0.048

Rf = 0.048 * 100% = 4.8%

how many groups of 3/4 are in 11/4

Answers

The number of groups of 3/4 in 11/4 is 3 2/3

Divide 11/4 by 3/4

= 11/4 ÷ 3/4

multiply by the reciprocal of 3/4

= 11/4 × 4/3

= (11 × 4) / (4 × 3)

= 44/12

= 3 8/12

= 3 2/3

Therefore, number of groups of 3/4 in 11/4 is 3 2/3

Learn more about division of fraction;

https://brainly.com/question/2261275

solve the equation 4p + 2 =22,using a double number line

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Answer:

the answer is 5

Step-by-step explanation:

Pls help- I'm having trouble

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I’m pretty sure it would be A!im learning this too ahah

six added to 9 times a number is 33. find the number

Answers

Answer:

The number is 3

Step-by-step explanation:

6 + 9n = 33

-6 -6

9n = 27

÷9 ÷9

n = 3

Find the value of y given ordered pairs and slope.
(8,0) (4, y) slope= 1/2

Answers

Answer:

-1/4xy+y=0

Step-by-step explanation:

Jack borrowed $1.50 from his friend Jenna every day for five days last week. What rational number represents how much Jack owed his friend last week?

Answers

Answer:

$7.50

Step-by-step explanation:

set up an equation: $ x days = total owed

1.50 x 5 = 7.50

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