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
FinnZ [79.3K]
3 years ago
9

The ratio of tom’s age to Mary’s is 3:4.If Tom is 15 how old is Mary

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0
Hey there!

Tom's age to Mary's is 3:4; an equivalent ratio is 15:x (x symbolizes Mary's age).

To solve for this, we need to divide our proportions. By that, I mean divide Tom's older age by his younger age. If we do so, we should get a scale factor that we can multiply Mary's younger age by.

15 / 3 = 5

This means that the scale factor of the ages is 5.

x / 4 = 5 (Solving for Mary's unknown age.)

To solve for x, multiply both sides by 4.

x/4 * 4 = x
5 * 4 = 20

x = 20

Mary's age is 20.

I hope this helps!
You might be interested in
The sum of two consecutive odd integers is 236. What is smaller integers
evablogger [386]
I'll say the first integer is x.  The next consecutive odd number would be x+2.  If the sum of the odd integers is 236, the equation would be
x + (x + 2) = 236
solve for x
2x + 2 = 236    
subtract 2 from each side of the equation
2x = 234
divide both sides by 2
x = 117
117 is the first odd integer.  to find the other integer (x + 2), substitute 117 for x, and you have 117 + 2, which equals 119
The two consecutive odd integers that add up to 236 are 117 and 119.
6 0
2 years ago
To estimate the percentage of a state's voters who support the current
Lady bird [3.3K]

Using the Central Limit Theorem, the percentage that is expected to be the closest to the actual percentage is:

A. The Tribune, at 68%.

<h3>What does the Central Limit Theorem state?</h3>

It states that for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean \mu = p and standard error s = \sqrt{\frac{p(1 - p)}{n}}, as long as np \geq 10 and n(1 - p) \geq 10.

From this, a larger sample size leads to a smaller error estimate. Since the Tribune had the largest sample size, option A is correct.

More can be learned about the Central Limit Theorem at brainly.com/question/16695444

#SPJ1

3 0
2 years ago
Give right triangle PQR, which representa the value of sin (P)?
Komok [63]

sinR = \frac{QR}{PQ}

noting that the sin ratio = \frac{opposite}{hypotenuse}

opposite to ∠P is QR and hypotenuse is PQ ( opposite right angle )


4 0
3 years ago
Read 2 more answers
here are 5 classes in your grade level. Each class is 6/7 full today. If a full class has 28 students, how many students in your
Crazy boy [7]

Answer:

A minimum of 24 students if all the students share a class with you. Not enough info to decide the largest size of grade.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Which ordered pair can be plotted together with these four points, so that the resulting graph still represents a function?
MrRissso [65]

Answer:

B.(-1,2)

Step-by-step explanation:

In a function, there can not be two different values of y corresponding to the same value of x.

See the graph attached.

Here, the points on the graph are (1,2), (2,-3), (-2,-2) and (-3,1).

If we consider point (-2,2) then there will be two points corresponding to the same x value i.e. (-2,-2) and (-2,2).

Similarly, if we consider the point (2,-2) or (2.-1) then also there becomes more than one values of y for a single value of x i.e. x = 2.

So, if we consider the ordered pair (-1,2) then only the graph still represents a function. (Answer)

7 0
2 years ago
Other questions:
  • Which error, if any, was made?
    8·2 answers
  • Bridget measured a restaurant and made a scale drawing. The restaurant’s kitchen is 6 millimeters long in the drawing. The actua
    10·1 answer
  • At the market, Meyer buys a
    12·1 answer
  • Burcu öğretmen elindeki 96 pembe kâğıdı erkek öğrencilere 136 mavi kâğıdı kız öğrencilere her bir öğrenci eşit sayıda kağıt alıc
    5·1 answer
  • Linear Algebra Problem: Determine if the given statements are True or False. Justify your answers (i.e., give a proof for true a
    6·1 answer
  • Which statement is false?
    6·2 answers
  • Four water tanks can hold a total of 432.4 gallons of water. On average, how much water can one tank hold? How much water is in
    11·2 answers
  • Find the geometric mean of the pair of numbers.
    14·1 answer
  • Which point is the incenter of △ABC ?
    15·1 answer
  • 9. DOG WALKING Evan, a dog walker, charges $3 every block that he walks a dog. He also charges a $5 pick up fee when he comes to
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!