In this problem we use the change of variables x=5s+t x = 5 s + t , y=s−3t y = s − 3 t to compute the integral ∫r(x+y)da ∫ r ( x + y ) d a , where r r is the parallelogram with vertices (x, y)=(0,0) ( x , y ) = ( 0 , 0 ) , (10,2) ( 10 , 2 ) , (11,−1) ( 11 , − 1 ) , and (1,−3) ( 1 , − 3 ) . first find the magnitude of the jacobian, ∣∣∂(x, y)∂(s, t)∣∣= | ∂ ( x , y ) ∂ ( s , t ) | = . then, with a= a = , b= b = , c= c = , and d= d = , ∫r(x+y)da=∫ba∫dc( ∫ r ( x + y ) d a = ∫ a b ∫ c d ( s+ s + t+ t + )dtds ) d t d s =

i can you with this question sweetie!

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

just sum

10 + 10 = 20