1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tomtit [17]
2 years ago
10

A city has 3 new houses for every 9 old houses. If there are 15 new houses in the city, how many old houses are there?

Mathematics
2 answers:
Arisa [49]2 years ago
6 0

Answer:

45 old houses

Step-by-step explanation:

new houses : old houses

3 : 9

15 : ?

(3 = 1st ratio and 9 = 2nd ratio)

To find the missing ratio, divide the first ratio from the new ratio:

15 / 3 = 5

Take the product and multiply that by the second ratio to find the missing ratio:

9 x 5 = 45

nadya68 [22]2 years ago
4 0

Answer:

45 old houses

Step-by-step explanation:

What I did:

I divided 15 by 3, to get an idea of the 'scale' which gives us 5

for every 9 old houses, we have 3 new ones; so to scale be multiply the base number by our "scale" number, 5.

3 * 5 = 15 new houses

8 * 5 = 45 old houses

You might be interested in
1. is he equation true , false, or open
RideAnS [48]

Question 1:

For this case we have the following equation:

 5x ^ 2 = 6x + 11

We observe that the equation is a polynomial of the second degree.

Therefore, the equation has two possible solutions.

The variable of the equation for this case is x.

In this case, we have an open equation because we have a variable.

Rewriting the equation we have:

5x ^ 2 - 6x - 11 = 0

Answer:

open, there is a variable.


Question 2:

For this case we have the following equation:

 2-8x = -6

From here, we must clear the value of x.

For this, we follow the following steps:

1) Pass the value of 8x adding:

2 = -6 + 8x

2) Pass the value of 6 adding:

2 + 6 = 8x

3) Add the values ​​on the same side of equality:

 8x = 8

4) Pass the 8 to divide:

x = \frac{8}{8} = 1

Answer:

The value of x is given by:

x = 1


Question 3:

For this case we have the following equation:

 y = x-4

The ordered pair solution is the one that satisfies both sides of the equation.

For the point (6, 2) we have:

x = 6  y = 2

Substituting values ​​we have:

2 = 6-4  2 = 2

We observe that both sides of the equation are equal.

Therefore, the ordered pair solution is (6, 2)

Answer:

An ordered pair that is a solution of the equation y = x-4 is:

(6, 2)

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME I REALLY NEED HELP PLEASEEEE If a circle has an area of 12πcm² and a diameter line AB, what is the length of arc
Softa [21]

Answer:

"Let's say it is equal to 45 degrees, or π/4. Calculate the arc length according to the formula above: L = r * Θ = 15 * π/4 = 11.78 cm . Calculate the area of a sector: A = r² * Θ / 2 = 15² * π/4 / 2 = 88.36 cm² . You can also use the arc length calculator to find the central angle or the radius of the circle. "

4 0
2 years ago
WILL GIVE BRAINLIEST<br> sketch the graph of the following equation: y=|4-3x|
Firdavs [7]

Answer:

attached

Step-by-step explanation:

y=|4-3x|    y: positive number

4 0
3 years ago
How do you write 1 hundred 25tens 1one ??
My name is Ann [436]
I think it would be 1251 
7 0
3 years ago
Read 2 more answers
Find a power series representation for the function. (Assume a&gt;0. Give your power series representation centered at x=0 .)
melamori03 [73]

Answer:

Step-by-step explanation:

Given that:

f_x = \dfrac{x^2}{a^7-x^7}

= \dfrac{x^2}{a^7(1-\dfrac{x^7}{a^7})}

= \dfrac{x^2}{a^7}\Big(1-\dfrac{x^7}{a^7} \Big)^{-1}

since  \Big((1-x)^{-1}= 1+x+x^2+x^3+...=\sum \limits ^{\infty}_{n=0}x^n\Big)

Then, it implies that:

\implies  \dfrac{x^2}{a^7} \sum \limits ^{\infty}_{n=0} \Big(\Big(\dfrac{x}{a} \Big)^{^7} \Big)^n

= \dfrac{x^2}{a^7} \sum \limits ^{\infty}_{n=0} \Big(\dfrac{x}{a} \Big)^{^{7n}}

= \dfrac{x^2}{a^7} \sum \limits ^{\infty}_{n=0} \Big(\dfrac{x^{7n}}{a^{7n}} \Big)}

\mathbf{=  \sum \limits ^{\infty}_{n=0} \dfrac{x^{7n+2}}{a^{7n+7}} }}

7 0
2 years ago
Other questions:
  • Lamar needs to find the sum of 3/6 and 2/3 could he multiple the denominator to find a common denominator explain the answer
    8·1 answer
  • The product of 3 consecutive odd numbers is 3,315. Enter a simplified expression for finding the numbers. Let n be the first odd
    7·1 answer
  • If m B = 3x - 9 and m C = 39°, then what is the value of x?<br> A.10<br> B.44<br> C.47<br> D.50
    13·1 answer
  • What is 3(10x + 7) equal to?
    11·2 answers
  • What is (x+3)(x+8)=0
    15·2 answers
  • How much bigger is 1 1/4 inch than 5/8 inch
    11·1 answer
  • Please help I will mark as brainliest
    8·1 answer
  • 60% of the class are girls. If 18 students are girls, how many total students are in the class?
    12·1 answer
  • Bonnie’s Bakery goes through 22 4/5 cups of vegetable oil in 2 weeks. If they use the same amount each week, how much do they go
    13·1 answer
  • Can someone please help me??? i really need it!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!