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3 years ago

Question 5 of 25

Mathematics

1 answer:

vichka [17]3 years ago

8 0

Answer:

Step-by-step explanation:

common ratio

2.1/0.7=3

6.3/2.1=3

18.9/6.3=3

therefore common ratio is equal to 3

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Semmy [17]

Hi there
I know it is!

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3 years ago

Which expression is equivalent to 1/2x+(−7)−2 1/4x−(−2

Lynna [10]

The equivalent expression to the given expression is $\mathbf{=-(\dfrac{7}{4}x+5)}$

<h3>What is an algebraic expression?</h3>

Algebraic expressions are mathematical expressions. They usually consist of one or more variables with their coefficients and arithmetic operators such as: (division, multiplication, addition, and subtraction).

From the given expression, we are to determine an expression that is equivalent to:

$=\dfrac{1}{2}x + (-7) -2 \dfrac{1}{4}x -(-2)$

To do this, we are going to simplify the above-given expression to its lowest term since we are not given any options to choose equivalent expressions from.

By doing so, we have:

$=\dfrac{1}{2}x -7 -\dfrac{9}{4}x +2$

$=\dfrac{1}{2}x -\dfrac{9}{4}x +2 -7$

$=\dfrac{1}{2}x -\dfrac{9}{4}x -5$

$=-\dfrac{7}{4}x-5$

$\mathbf{=-(\dfrac{7}{4}x+5)}$

Learn more about solving algebraic expressions here:

brainly.com/question/4344214

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5 0

2 years ago

Answer correctly please for brainliest

inn [45]

Answer:

30 miles 90 miles

----------------- = -----------------------

1.5 hours 4 hours

the dashes between the number represents me making a fraction lol.

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3 years ago

I have a rectangle that is 2 1/2 feet long and 1 1/3 feet wide. What is the area of the rectangle? Please show work

bezimeni [28]

I cant really attach a picture but this is the answer so you turn 2 1/2 into a improper fraction which is 5/2. then you multiply 11/3*5/2. And that equals 55/6. and then turn it into a whole number and it equals 9.16..

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3 years ago

Question # 4

nadezda [96]

Ages of Mark, Brett and Carl are 80 years, 60 years and 70 years respectively.

<u>Solution:</u>

Given that

Brett is 18 years younger than Mark.

Carl is 10 years younger than Mark.

The sum of the ages of Brett, Mark, and Carl is 212

Need to determine age of Brett, Mark, and Carl.

Let assume age of mark in years be represented by variable x

As it is given that Brett is 18 years younger than Mark , so if we subtract 18 from the age of Mark we will get age of Brett ,

=> Age of Brett = x – 18

Also given that Carl is 10 years younger than Mark , so if we subtract 10 from the age of Mark we will get age of Carl ,

=> Age of Carl = x – 10

Given sum of ages of Brett, Mark, and Carl is 212

=> Age of Mark + Age of Brett + Age of Carl = 212

=> x + ( x – 18 ) + ( x – 10) = 212

=> 3x – 28 = 212

=> 3x = 212 + 28

Age of Mark = x = 80 years

Age of Brett = x – 18 = 80 – 18 = 62 years

Age of Carl = x – 10 = 80 – 10 = 70 years

Hence Ages of Mark , Brett and Carl are 80 years, 60 years and 70 years respectively.

3 0

3 years ago