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
aleksklad [387]
3 years ago
11

(PLEASE HELP ASAP!!). One's intelligence quotient, or IQ, varies directly as a person's mental age and inversely as that person'

s chronological age. A person with a mental age of 15 and a
chronological age of 30 has an IQ of 120: What is the chronological age of a person with a mental age of 20 and an IQ of 120?
The chronological age is
Mathematics
1 answer:
shusha [124]3 years ago
8 0

Answer:40

Step-by-step explanation:This is a variation question

From the statement. Let the mental age be M and the chronological  age be C, then

IQ ∝M ∝1/C

⇒ IQ ∝ M/C

Introducing the proportionality constant

IQ = KM/ C

Given : M = 15, C = 30 , 1Q = 20

Substitute the given values into the equation

i.e 120 = K x 15/ 30

    120 = k/2

therefore k = 240

substitute k = 240 into the equation, we have

IQ = 240M/C

To find C when IQ is 120 and M is 20, we will substitute into the generated formula

i.e 120 = 240 x 20 / c

     120c = 480

            C = 480/120

             C = 40

Therefore , the chronological age of a person with mental age of 20 and IQ of 120 is 40

You might be interested in
Please help!!
bogdanovich [222]

Answer:

Rent in 10th year = $5345.90

Step-by-step explanation:

Rent of apartment during first year = $1800 per month

But growth in rent with 11.5% per year will be represented by the exponential function,

Rent in 't'th year = \text{Initial rent}(1+\frac{\text{Growth rate}}{100})^{\text{time}}

                          = 1800(1+\frac{11.5}{100})^t

                          = 1800(1.115)^t

Therefore, rent during 10th year will be,

Rent in 10th year = 1800(1.115)^{10}

                            = $5345.90

3 0
3 years ago
Read 2 more answers
What is the scale factor from L to S?
MariettaO [177]

Answer: While I don’t have the picture to actually know the answer I will explain how to get it.

Step-by-step explanation:

1. If the shapes are on a grid count the amount of grid squares that are located between each end point of the shape. If it’s not on a grid use a ruler to measure the side lengths. You will need to find out the side amounts for both shapes L and S.

2. From there if the L shape is SMALLER than the S shape, then take the S shape’s sides and divide it by the L shape’s sides, and whatever number you get from each of your division problems will be your scale factor. BUT If the L shape is BIGGER than the S shape then easiest way to find out your scale factor is to take the last scale factor you got and convert it into a fraction. For example, if you got 3 then it would be 1/3. Hope this helped!

8 0
2 years ago
a woman is expecting triplets. what is the probability that there are 2 girls and 1 boy? what is the probability that all 3 babi
navik [9.2K]
Let the boy be B and the girl be G
there are six possible outcomes 
BGG, GBB, GBG, BGB, BBB, and GGG
therefore the probability of getting one boy and two girls is \frac{1}{6}
also the probability of getting 3 girls is \frac{1}{6}

8 0
3 years ago
Read 2 more answers
The standard diameter of a penny is 0.75 in. and the standard
Blababa [14]

Answer: .045

Step-by-step explanation:.75=.750 so, 750-705=.045

Hope this helps!

6 0
3 years ago
Identify the variable in: 7h + 3
7nadin3 [17]
Isn’t it h?

extra words so i can actually post this reply
3 0
2 years ago
Read 2 more answers
Other questions:
  • What is the constant of proportionality in the equation y = 2.5x?
    12·2 answers
  • Convert 65 miles per hour to kilometers per second
    13·1 answer
  • What is a rectangles dimensions if the perimeter is 20 and the area is 24?
    10·1 answer
  • Find the sum +5+(-2)
    10·1 answer
  • 8. Which of the following best describes an<br> object with constant velocity?
    12·2 answers
  • Csc^2 xcos^2 x=csc^2 x-1<br><br> prove the identity
    10·1 answer
  • Evaluate. -1/2y + 3 = -12
    11·1 answer
  • Identify the constant of proportionality from the graph.
    15·1 answer
  • The points P and Q have coordinates (-1, 6) and (9, 0) respectively.
    7·1 answer
  • 1,0000X2,000000 can you help me answer
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!