C=x+9, c+x=99, c=99-x

So we have two equations equal to c, c=x+9 and c=99-x, since c=c:

x+9=99-x

2x+9=99

2x=90

x=45, and since c=x+9, c=54

So Charlie weighs 54 kg and his brother weighs 45 kg.

4 0

3 years ago

You South lanes only cut the triangles be similar

Arada [10]

I dont get what you’re asking ?

5 0

3 years ago

What 3x4x5x6+7= <br> single numbers

Lana71 [14]

Answer:

367

Step-by-step explanation:

because of PEMDAS, 3, 4, 5, and 6 have to be multiplied together, then 7 can be added later.

$(3*4*5*6)=360\\\\360+7=367$

4 0

2 years ago

Read 2 more answers

Make r the subject and find the value

nalin [4]

$~~~~~~~~\dfrac{1}{R} = \dfrac{1}{R_1} + \dfrac 1{R_2}\\\\\\\implies \dfrac 1{R_2} = \dfrac{1}{R } - \dfrac 1{R_1}\\\\\\\implies \dfrac 1{R_2} = \dfrac{R_1 -R}{RR_1}\\\\\\\implies R_2 = \dfrac{RR_1}{R_1-R}\\\\\\\text{When}~ R= 24~ \Omega ~ \text{and}~ R_1 = 30~ \Omega,\\\\R_2 = \dfrac{24 \times 30}{30-24}~\Omega\\\\\\~~~~~=\dfrac{720}{6}~ \Omega\\\\\\~~~~= 120~ \Omega$

4 0

2 years ago