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

Which state applied to join the Union in 1819?

Who rescues the narrator from his prison, on the story "The Pit and the Pendulum?

What Ishtar answer to 5x-83=82-6x

How do you conjugate for the past tense here? La fin de semaine dernière, tes cousines _______ à minuit. (s'endormir)

Why is it important that the phospholipid bilayer be both hydrophobic and hydrophilic?

What is the unit rate of four pounds of apples that cost $1.96

Identify the strategy that writers might use while editing. a. writing without stopping for a set number of minutes b. reading a draft backwards, sentence by s

How would an increase in nest sites affect a population of pigeons? AThe population would decrease. BThe population would increase. CThe population would remain

When Georgia was a Royal colony, how were members of the Governor's Council chosen?

In Australia most cattle ranching is found in Queensland