autumnxng13061 autumnxng13061

01-01-2018
Mathematics

contestada

The square of sophie's age is 16 less than joanna's age. it is also the case that joanna's age is 8 times that of sophie. how old is joanna?

Respuesta :

jorel1380 jorel1380

01-01-2018

Let s be Sophie's age. Then joanna is s²+16. Joanna is also 8s, if Sophie is s. So:
s²+16=8s
s²-8s+16=0
(s-4)²=0
s=4
Sophie is 4; Joanna is 32
☺☺☺☺

Answer Link

Otras preguntas

Ugggghhhh, I honestly hate math....

In a class no of girls is 11 more than the no of boys .If the total no.of students in the class is 55 how many are girls?

How can you tell were an ocean begins and ends?

At 30 miles an hour how long does it take to travel 180 miles from

In parallelogram RSWY, find m

Need help A.S.A.P If the length of the pool is 14 1/2 feet, the width is 6 1/2, and the depth is 6 1/2 feet,what is the volume of the pool.

Hi, Can I get some help with this calculus homework? Please show your work! Thanks! #28 a and b

Using a molar heat of combustion of hexane (C6H14) –4163 kJ/mol, the mass of hexane required to increase the temperature of 1.76 L of water from 21.0°C to 70.0°

express each of the following in logarithmic form

Which choice is equivalent to the quotient shown here for acceptable values of x