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2 years ago

In 3 years, Dianna will be 4 times as old as she was 33 years ago. How old is Dianna now?

Mathematics

1 answer:

Sergeu [11.5K]2 years ago

4 0

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

<h3>How old is Dianna now?</h3>

Given that, in 3 years, Dianna will be 4 times as old as she was 33 years ago.

Let x represent the age of Dianna presently.

Dianna's age in 3 years time will be: x + 3

Dianna's age 33 years ago is: x - 33

Since in 3 years, she will be 4 times as old as she was 33 years ago.

x + 3 = 4( x - 33 )

We solve for x

x + 3 = 4x - 132

3 + 132 = 4x - x

135 = 3x

x = 135/3

x = 45

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

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Find the centre and radius for this circle , x^2+y^2=25

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Step-by-step explanation:

The equation of a circle centred at the origin is

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3 years ago

A rectangular field is 300 meters long and 250 meters wide. What is the area of the field in square kilometers

lidiya [134]

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0.075 sq km

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3 years ago

Laura answered 27 questions correct on a test on her test and scored 90%. How many questions where on the test?

Nadya [2.5K]

The number of questions in the test is 30

Step-by-step explanation:

Let's call the total number of questions in the test N.

We know that Laura answered 27 questions, and these 27 questions represent the 90% of the test.

Therefore, we can say that 27 is the 90% of N.

Re-writing the percentage as a fraction,

$90\% = 0.90$

This means that:

$0.90 N = 27$

And now we can solve for N to find the number of questions in the test:

$N=\frac{27}{0.90}=30$

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3 years ago

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a salesperso

serg [7]

Using variable concepts, of dependent and independent variables, it is found that the dependent variable is the amount of sales dollars earned.

<h3>What is the relation between a function and the dependent and independent variables?</h3>

A function has the following format: y = f(x).

In which each value of y is a function of one value of x, and thus, <u>x is the independent variable and y is the dependent variable</u>.

That is, the input of the function is the independent variable and the output is the dependent variable.

In this problem, the manager believes that the amount of sales dollars earned is a function of the number of contacts that the salesperson makes, hence:

The number of contacts is the independent variable.

The amount of sales dollars earned is the dependent variable.

More can be learned about dependent and independent variables at brainly.com/question/1429012

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2 years ago