2 years ago

4.

Mathematics

1 answer:

oksano4ka [1.4K]2 years ago

7 0

Step-by-step explanation:

a = age of Alex

l = age of Lucy

m = age of Megan

a + l + m = 126

l = 3a

l = m + 7

a = l/3

m = l - 7

we are using that in the first equation :

l/3 + l + l - 7 = 126

l + 3l + 3l - 21 = 378

7l = 357

l = 357/7 = 51

a = l/3 = 51/3 = 17

m = l - 7 = 51 - 7 = 44

the ratio of the age of Lucy to Alex to Megan is

51 : 17 : 44

You might be interested in

What is the approximate area of the circle?

Sophie [7]

Answer:

Step-by-step explanation:

because it is

5 0

2 years ago

Read 2 more answers

A poster measures 9 1/2 inches by 11 3/4 inches estimate the area of poster

Lerok [7]

Answer:

111.625

Step-by-step explanation:

PICK me for BRAINLIEST

5 0

3 years ago

a circular stained glass window frame with a diameter 20 inches is divided into 8 congruent find the area of 3 of the 8 panes of

ahrayia [7]

Answer:

it would be 45

Step-by-step explanation:

6 0

2 years ago

Find the least common multiple of: 12x^3y^2 and 15x^2y^5

allochka39001 [22]

Answer: $60x^3y^5$

Step-by-step explanation:

Least Common Multiple :The least positive number that is a multiple of two or more numbers.

To find : The least common multiple of: $12x^3y^2$ and $15x^2y^5.$

Since, $12x^3y^2=2\times2\times3\times x^3y^2$

$15x^2y^5=3\times5\times x^2y^5$

The least common multiple of: $12x^3y^2$ and $15x^2y^5.$ = $2\times2\times3\times5\times x^3y^5=60x^3y^5$ [take highest power of x and y ]

Hence, the least common multiple of: $12x^3y^2$ and $15x^2y^5.$ = $60x^3y^5$

3 0

3 years ago

90 is 75% of what number

Viktor [21]

Answer:

120

Step-by-step explanation:

90 x 100 ÷ 75 = 120

5 0

3 years ago