help me figure it out

Help Me Figure It Out

Answers

Answer 1
Assuming the new length and width is proportional to the first, set up a proportion like so:

30 cm/10 cm= x cm/4 cm

Cross multiply:
30*4=120
120/10=12=x

Final answer: 12 cm long

Related Questions

The number of cows in a farm was 60% of the number of the goats. After 80 goats were taken out of the farm, the number of goats became 60% of the number of cows in the farm.
(a)how many cows were there in the farm?
(b) what is the percentage of the goats were moved out of the farm?

Answers

Before:
The number of goats =60%
The number of cows = 100%

Using ratio
Cows : Goats
60 : 100 reduced to simplest term

C:G
3:5

After
The number of cows = 100%
The number of goats = 60%

Using ratio

C:G
100:60 reduced to simplest term
C:G
5:3

Number of cows remained constant. Therefore find the common multiple.

Before
C:G
15:25

After
C:G
15:9

Find the difference in the units of goats

(a)25 - 19= 16
16 units =80
1 unit = 5
15 units (cows) = 5 x 15 = 75
There were 75 cows.

(B)
Number of goats at first
25 units = 5 x 25 = 125
Therefore percentage= 80/125 x 100
= 64%

Which equivalent fraction would you have to use in order to add 3/5 to 21/25

Answers

15/25 would be your answer.

21/25+3/5=x
5x5 is 25
3 x 5 is 15
21/25+ 15/25= 36/25

Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. When she began her study, the frog population was estimated at 1,200. Choose the function that represents the frog population after x years.

A. f(x) = 1,200(1.03)x
B. f(x) = 1,200(0.03)x
C. f(x) = 1,200(0.97)x
D. f(x) = 1,200(0.97)x

Answers

 The answer is B,B. f(x) = 1,200(0.03)x
B.) f(x) = 1,200(1.03)x

Evaluate the expression 3(7 + 4)2 − 14 ÷ 7. 50 361 363 586

Answers

It appears that none of your option choices are correct,, are you sure you copied them right ? I will show you how to solve this and how I got my answer.
The first step for solving this is to add the numbers in the parenthesis.
3 × 11 × 2 - 14 ÷ 7
Divide -14 by 7.
3 × 11 × 2 - 2
Divide the first 3 numbers together.
66 - 2
Subtract the numbers together to get your final answer.
64
Let me know if you have any further questions.
:)

Write an expression for the calculation subtract 10 divided into fifths from 20 divided in half.

Answers

Which answer shows these decimals written in order from greatest to least?
 76.493   79.2    76.81        A. 79.2 > 76.493 > 76.81   B. 76.81 > 76.493 > 79.2   C. 79.2 > 76.81 > 76.493   D. 76.493 > 79.2 > 76.81

Graph ​ y=−56x−4 ​.

Use the line tool and select two points on the line.


Answers

5/6 is the slope
and -4 is the y intercept 
so you first graph 0,-4 
then use the slope and move 5 units up and 6 to the right 

The two points on the line y = − 56x − 4 will be (1, −60) and (−1, 52).

What is the solution to the equation?

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

y = − 56x − 4

Let x = 1, the value of y will be

y = − 56 (1) − 4

y = − 56 − 4

y = − 60

Let x = − 1, the value of y will be

y = − 56(−1) − 4

y = 56 − 4

y = 52

The two points on the line y = − 56x − 4 will be (1, −60) and (−1, 52). Then the diagram of the line is given below.

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Can I get help simplifying these three questions? Thanks!
First Question 3a–a+18–a
Second Question (a+3)–(a+2)
Third Question 43+a–2a

Answers

1. 3a - 1 + 18 - a

So you can reorder these, as long as they keep the sign in front of them.

3a - a - 1 + 18, you can reorder it to.

And then just add or subtract.

2a + 17

2. (a+3) - (a + 2)

First you want to open the parenthesis.

To do that, check the symbol before the parenthesis.

If it's a minus, reverse the operator inside the parenthesis. If it's a plus, do nothing.

So just,

a + 3 - a - 2

Then reorder again

a - a + 3 - 2

1

3. 43 + a - 2a

Just subtract, a - 2a, to get -a.

So,

43 - a

Liz earns a salary of $2,100 per month, plus a commission of 5% of her sales. She wants to earn at least $2,400 this month. Write an inequality to find the amount of sales that will meet her goal. Identify what your variable represents.

Answers

2100 + 0.05(x) >= 2400
(greater than or equal to)
X represents her sales

At Furnace Woods School, enrollment increased from 320 students in 2006 to 349 students in 2007. What is the percent increase in enrollment? 

Answers

320 to 349 % increase is 9.0625

If 45 cookies will serve 15 students, how many collies are needed for 30 students?

Answers

45 cookies for 15 students = 3 cookies per student

3 x 30 = 90 cookies 

you need 90 cookies for 30 students

hope this helps
yep the answer is 90 

150 students at york middle school took part in the school clean up. This is 30% of the school's total students. How many students go to he middle school?

Answers

500 students go to the middle school.
500 students go to York Middle School

-0.3,0.5,0.55,-0.35 in least to greatest

Answers

-0.35, -0.3, 0.5, 0.55

is your answer

hope this helps
0.3 0.35. 0.5 0.55 is from least to greatest

7/8,42/48 determine whether each pair of ratios are equivalent ratios right yes or no

Answers

Yes
7x6=42
8x6=48
Hope that helped :D

Purple paint is made with a 16:3:1 ratio of white paint:blue paint:red paint. How much white paint, in gallons, is needed in order to make one gallon of purple paint? Express your answer as a common fraction.

Answers

Answer:

4/5

Step-by-step explanation:

The purple paint is split into 16+3+1=20 parts: 16 parts of white, 3 parts of blue, and 1 part of red. Thus, in one gallon of purple paint, 16 out of the total 20 parts are white paint, so there are 16/20 x 1 gallon = 4/5 gallons of white paint in one gallon of purple paint.

The amount of white paint that is needed in order to make a gallon of purple paint would be 4 / 5 gallons.

How to find the number of gallons ?

The ratio of white:blue:red paint is given as 16:3:1. The sum of these ratio components gives the total parts for one 'unit' of paint.

So, 16 (for white) + 3 (for blue) + 1 (for red) = 20 total parts.

This implies that the 20 parts in this ratio make up 1 gallon of purple paint (as per the question). To find the quantity of white paint needed, we simply need to convert the 'parts' of white paint into gallons.

Since 20 parts is equivalent to 1 gallon, 1 part would be equivalent to 1/20 of a gallon. Therefore, 16 parts of white paint would be equivalent to :

= 16 * (1/20)

= 16/20

= 4/5 gallons

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The three seventh grade classes at Sunview Middle School collected the most boxtops for a school fundraiser. They won a $600 prize to share among them. Mr. Aceves’ class collected 3,760 box tops, Mrs. Baca’s class collected 2,301, and Mr. Canyon’s class collected 1,855. How should they divide the money so that each class gets the same fraction of the prize money as the fraction of the box tops that they collected? Explain your reasoning.

Answers

Since Mr. Aceve's class collected 3,760 they should receive $300 of the prize money, Mrs. Baca's class collected 2,301 they should receive $200, Mr. Canyon's class collected 1,855 they should receive $100.

Answer: The share would be approximately $285, $175, $141 respectively.

Step-by-step explanation:

Since we have given that

Number of box tops collected by Mr. Aceves's class = 3760

Number of box tops collected by Mrs. Baca's class = 2301

Number of box tops collected by Mr, Canyon's class = 1855

We first find the ration of box tops of Mr. Aceves, Mrs. Baca and Mr. Canyon respectively:

3760:2301:1855

Total = 3760+2301+1855=7916

Total amount to be share among them as a prize = $600

Mr. Aceves's share is given by

[tex]\dfrac{3760}{7916}\times 600\\\\=284.99\\\\\approx 285[/tex]

Mrs. Baca's share is given by

[tex]\dfrac{2301}{7916}\times 600\\\\=175.08\\\\\approx 175[/tex]

Mr. Canyon's share is given by

[tex]\dfrac{1855}{7916}\times 600\\\\=140.60\\\\\approx 141[/tex]

Hence, the share would be approximately $285, $175, $141 respectively.

A used-car dealer has a vehicle on the lot with a sticker price of $5999. if the dealer markup on used vehicles is 20%, how much did the dealer pay for the car?

Answers

Answer:

the correct APEX answer is $4999.17

The cost of car is $4,999.16.

What is Percentage?

To determine the quantity or percentage of something in terms of 100, use the percentage formula. Per cent simply means one in a hundred. Using the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a fraction of 100 is what it is. It is mostly used to compare and determine ratios and is represented by the symbol %.

Given:

A used-car dealer has a vehicle on the lot with a sticker price of $5999.

Mark up = 20%

let the cost of Car be x.

So, x+ 20% of x = 5999

x + 20/100 x = 5999

x + 0.20 x = 5999

1.2 x= 5999

x = 5999/ 1.2

x = $4,999.16

Hence, the cost of car is $4,999.16.

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nine is greater than or equal to 15 minus a number


write as a inequality

Answers

This is how you write it, remember to put the line under the greater than sign

The inequality will be;

⇒ 9 ≥ 15 - x

Where, x  is a number.

What is Inequality?

A relation by which we can compare two or more mathematical expression is called an inequality.

Given that;

The expression is,

''Nine is greater than or equal to 15 minus a number''

Now,

Let a number = x

So, We can formulate;

The inequality for the given expression is,

⇒ 9 ≥ 15 - x

Thus, The inequality will be;

⇒ 9 ≥ 15 - x

Where, x  is a number.

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Use the distributive property of multiplication to find 7 x 22

Hint: 22 = 20 +2




Please show all work, Thank you:)

Answers

We multiply 7 by 20 to get 140. We also multiply 7 by 2 to get 14. Add 140 to 14 to get 154

Here's how you can write it out
7 x 22 = 7 x (22)
7 x 22 = 7 x (20+2)
7 x 22 = 7x 20 + 7 x 2  ... distributive property
7 x 22 = 140 + 14
7 x 22 = 154

Answer: 154
Final answer:

The distributive property of multiplication is used to simplify 7 x 22. By substituting 22 with 20 + 2 and distributing the multiplication, it becomes 7 x 20 plus 7 x 2, which equals 154.

Explanation:

The question is asking us to use the distributive property of multiplication to calculate 7 x 22. The distributive property allows us to multiply a single term and two or more terms inside a set of parenthesis. Here we are given the hint that 22 = 20 + 2.

Following the hint, we substitute 22 with (20 + 2) in the multiplication expression. So, 7 x 22 becomes 7 x (20 + 2). Now, by distributive property, we can take the multiplication inside the parenthesis.

7 x 20 = 140 7 x 2 = 14

By adding both these results, 140 + 14, we get the final answer 154.

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Which phrase could be represented by this expression?   

 k/5 + 8
or 
k over 5 + 8


eight more than a fifth of a number


five times a number plus eight


eight more than five times a number


one-fifth of the sum of a number and eight

Answers

eight more than a fifth of a number

An interior decorator purchased a painting for $95, a sofa for $225, a chair for $275, and an end table for $155. The tax was $60 and delivery was $75. If she paid for the furniture with $50 bills, how many bills were needed?

Answers

17 fifty dollar bills were needed.

The total was $885

885 / 50 = 17.7

to rent a car,the fast company charges $75 per day plus $0.05 per mile. how many miles did mrs.kline drive if the cost of renting the car was $ 92.40?

Answers

75+0.05m=92.4
0.05m=92.4-75
0.05m=17.4
m=348
mrs. kline drove 348 miles

Stacy and Neil painted 280 ft2 of there living room wall with 4/5 gallon of paint. How many square feet can they paint with 3 gallons of paint?

Answers

1050 ft^2 is the answer

Answer:

They can paint 1050 sq.feet with 3 gallons of paint

Step-by-step explanation:

Given :Stacy and Neil painted 280 ft2 of there living room wall with 4/5 gallon of paint.

To Find : How many square feet can they paint with 3 gallons of paint?

Solution :

Area painted with [tex]\frac{4}{5}[/tex] gallons of paint = 280

Area painted with 1 gallon of paint =[tex]\frac{280}{\frac{4}{5}} = 350 ft^2[/tex]

Area painted with 3 gallons of paint =[tex]350 \times 3 = 1050 ft^2[/tex]

Hence they can paint 1050 sq.feet with 3 gallons of paint

Eliza earns $400 per week plus $15 for each new customer she signs up. Let c represent the number of new customers Eliza signs up. Write an expression that shows how much she earns in a week. Then find how much Eliza earns in a week in which she signs up 18 customers.

Answers

Elisa earns $400 per week plus $15 new customer
She made $400 one week plus $165 for 18 new customers

Answer:

400+ (15c)

$670

Step-by-step explanation:

Eliza earns per week = $400

She earns for each new customer's signs up = $15

Let the number of new customers Eliza signs up = c

The expression that shows her earning in a week will be

400+ (15c)

If the number of customers that signs up = 18

The weekly earning of Eliza will be = 400+(15 × 18)

                                                          = 400 + 270

                                                          = $670

Eliza's earning in a week would be $670.

Which fraction expresses 36/80 in lowest terms? Please help me ;D

Answers

To reduce a fraction to lowest terms (also called its simplest form), divide both the numerator and denominator by the GCD. For example, 2/3 is in lowest form, but 4/6 is not in lowest form (the GCD of 4 and 6 is 2) and 4/6 can be expressed as 2/3.

38/80= 19/40

Three times the smaller of two consecutive EVEN integers IS four less than twice the larger. What are the two integers?
PLEASE HELP ME WITH THIS

Answers

The two consecutive even integers are 8 and 10.

Given that, three times the smaller of two consecutive even integers is four less than twice the larger.

What is an equation?

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Let two consecutive even integers be x and x+2.

Now, 3x-4=2(x+2)

⇒ 3x-4=2x+4

⇒ 3x-2x=4+4

⇒ x=8

So, x+2=10

Therefore, the two consecutive even integers are 8 and 10.

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How can the difference 13-(-24)be rewritten as a sum with the correct solution? Explain?
A: (-13) + (-24) = -37
B: 13 + (-24) = -11
C: (-13) + 24 = 11
D: 13 + 24 = 37

Answers

D 13+24=37 because minus -24 can be written as plus 24
D. 13 + 24 = 37

Remember the rule:
Subtracting a negative is the same as adding a positive. 

The scale on a map is 2cm = 15miles. Dave measures the distance to the next town at 7cm. How many miles away is the next town?

Answers

Try 15 times 7 which is 105 miles.....I believe is the correct answer

Answer:

[tex]52.5\ miles[/tex]

Step-by-step explanation:

we know that

The scale on the map is equal to

[tex]\frac{2}{15}\frac{cm}{miles}[/tex]

so

by proportion

Find how many miles are [tex]7\ cm[/tex] on the map

[tex]\frac{2}{15}\frac{cm}{miles}=\frac{7}{x}\frac{cm}{miles}\\ \\x=15*7/2\\ \\x=52.5\ miles[/tex]

A baseball weighs 5 ounces and the NY Yankees ordered 3,200 baseballs. How many tons do the baseballs weigh?

Answers

First thing you need to do is multiply 5 ounces by 3200 baseballs. This will tell you how many ounces all the baseballs weigh.

3200
x     5
16000 ounces

Then you need to convert that into pounds. Since there are 16 ounces in a pound, you need to divide by 16.

16000
÷     16
   1000 pounds

Since the question asks you how many TONS the baseballs weigh, you need to convert pounds to tons. There are 2000 pounds in a ton, so you divide by 2000.

  1000
÷2000
0.5 tons

0.5 tons is your answer.

Answer:

dont come at me if im wrong but im pretty sure the answer is 1/2 or .5

Step-by-step explanation:

It costs $2.55 to make a sandwich at the local deli shop. To make a profit, the deli sells it at a price that is 140% of the cost. The sandwich sells for $___.

Answers

140% of $2.55 is $3.57

Solve the following system of equations algebraically for all values of x,y and z
x+3y+5z=45
6x-3y+2z=-10
-2x+3y+8z=72

Answers

x + 3y + 5z = 45
6x - 3y + 2z = - 10
------------------------add
7x + 7z = 35

6x - 3y + 2z = -10
-2x + 3y + 8z = 72
----------------------add
4x + 10z = 62

7x + 7z = 35....multiply by 4
4x + 10z = 62...multiply by -7
---------------------
28x + 28z = 140 (result of multiplying by 4)
-28x - 70z = - 434 (result of multiplying by -7)
--------------------add
- 42z = - 294
z = -294/-42
z = 7

4x + 10z = 62
4x + 10(7) = 62
4x + 70 = 62
4x = 62 - 70
4x = - 8
x = -8/4
x = -2

x + 3y + 5z = 45
-2 + 3y + 5(7) = 45
-2 + 3y + 35 = 45
3y + 33 = 45
3y = 45 - 33
3y = 12
y = 12/3
y = 4

solution is (-2,4,7) <==
Final answer:

The system of equations x+3y+5z=45, 6x-3y+2z=-10, -2x+3y+8z=72 can be solved algebraically to get the values x=6, y=12, z=-1.

Explanation:

First, we can combine the first and the second equations and the first and third equations to cancel out y.

Doing so, we get: x+3y+5z+6x-3y+2z=45-10 and x+3y+5z-2x+3y+8z=45+72

The new equations simplify to 7x+7z=35 and -x+13z=117

Next, we can divide the first new equation by 7 to get x+z=5. Subtract x from both sides to get z=5-x.

Substitute z=5-x into the second equation to find the value of x.

Performing these substitutions gives x=6. Substituting x=6 back into the equation z=5-x gives z=-1.

Finally, we substitute x=6 and z=-1 back into the original equations to solve for y: y=(45-6-5(-1))/3 = 12

So, x=6, y=12, z=-1 are the solutions to the system of equations.

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