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
Alex_Xolod [135]
3 years ago
8

Samantha, Wilbert and Zahir have ages in ratio of 7:8:9. Zahir is 8 years older than Samantha. What are their ages?

Mathematics
2 answers:
vichka [17]3 years ago
4 0

Answer:

Samantha: 28, Wilbert: 32, Zahir: 36.

Step-by-step explanation:

The difference of 2 ratio units corresponds to a difference of 8 years, so each ratio unit stands for 4 years.

The ratio of ages in years is ...

... 4×7 : 4×8 : 4×9 = 28 : 32 : 36

Readme [11.4K]3 years ago
4 0
Zahir is 36 years old
Samantha is 28 years old
(Wilbert is 32 years old)

9×4=36
7×4=28
36-28=8
You might be interested in
How do u rewrite this
Ghella [55]

Answer:

C

Step-by-step explanation:

x ^m/n=n√x^m

to rewrite the exponentiation as a radical.

4 0
2 years ago
In each of Problems 5 through 10, verify that each given function is a solution of the differential equation.
WARRIOR [948]

Answer:

For First Solution: y_1(t)=e^t

y_1(t)=e^t is the solution of equation y''-y=0.

For 2nd Solution:y_2(t)=cosht

y_2(t)=cosht  is the solution of equation y''-y=0.

Step-by-step explanation:

For First Solution: y_1(t)=e^t

In order to prove whether it is a solution or not we have to put it into the equation and check. For this we have to take derivatives.

y_1(t)=e^t

First order derivative:

y'_1(t)=e^t

2nd order Derivative:

y''_1(t)=e^t

Put Them in equation y''-y=0

e^t-e^t=0

0=0

Hence y_1(t)=e^t is the solution of equation y''-y=0.

For 2nd Solution:

y_2(t)=cosht

In order to prove whether it is a solution or not we have to put it into the equation and check. For this we have to take derivatives.

y_2(t)=cosht

First order derivative:

y'_2(t)=sinht

2nd order Derivative:

y''_2(t)=cosht

Put Them in equation y''-y=0

cosht-cosht=0

0=0

Hence y_2(t)=cosht  is the solution of equation y''-y=0.

3 0
3 years ago
Hii! If someone could plz help me!
sergeinik [125]

Answer:

-4.5 is less than 3

-12/5 is less than 2

-3, -1.5, -1, 0, 2, 2.75, 5, 5.2

-3/2 = -1.5

11/4 = 2.75

3 0
3 years ago
Help please, see attachment ​
katen-ka-za [31]
I’m sorry but I can’t see the attachment..
6 0
3 years ago
Read 2 more answers
A survey found 195 of 250 randomly selected Internet users have high-speed Internet access at home. Construct a 90% confidence i
Andrej [43]

Answer:

d. (0.737, 0.823)

The 90% confidence interval is = (0.737, 0.823)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

p+/-z√(p(1-p)/n)

Given that;

Proportion p = 195/250 = 0.78

Number of samples n = 250

Confidence interval = 90%

z value(at 90% confidence) = 1.645

Substituting the values we have;

0.78 +/- 1.645√(0.78(1-0.78)/250)

0.78 +/- 1.645√(0.0006864)

0.78 +/- 1.645(0.026199236630)

0.78 +/- 0.043097744256

0.78 +/- 0.043

(0.737, 0.823)

The 90% confidence interval is = (0.737, 0.823)

8 0
3 years ago
Other questions:
  • A cylinder of manganese (length 4.00 cm, diameter = 1.00 cm) has a mass of 22.62 g. What is the density of manganese?
    15·1 answer
  • What is the product of the rational expressions shown below? Make sure your
    14·1 answer
  • 5+5 you get 52 points for answering this question
    5·1 answer
  • A water pitcher contains 2/3 gallons of water you add 5/7 gallons of water to the picture how much water to the picture contain
    6·2 answers
  • Find the best buy (based on price per unit) for cereal.
    8·1 answer
  • Find the first derivative of the function square root of x+1/4sin(2x)squared
    10·1 answer
  • What is the value of 5 2/3 +(-3 5/6)+(-2/3)? ​
    7·1 answer
  • The point (3, −5) is reflected over the x-axis. What are the coordinates of the new point? Group of answer choices
    9·1 answer
  • Liam is going on a vacation to Australia. His flight leaves at 3:15 P.M. It takes 1 hour and 35 minutes to get to the airport, a
    14·1 answer
  • Can someone help me with the areas?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!