Question

I need some help on this problems please!

Solve the following system of equations with the substitution method: 4y +3 l-4x +16y -12 Answer: ( ) Enter your answers as integers or as reduced fractions in the form A/B. If there is no solution, t there are an infinite number of solutions, specify their form in the blanks in terms ofy Solve the system with the addition method: 5 x 4y 3 20x 16y 12 Answer: ( ) You have one type of chocolate that sells for $2.00/lb and another type of chocolate that sells for $4.20/lb. You would like to have 17.6 lbs of a chocolate mixture that sells for $3.00/lb. How much of each chocolate will you need to obtain the desired mixture? You will need Ibs of the cheaper chocolate and Ibs of the expensive chocolate. Bryce invests $3100 in two different accounts. The first account paid 8 %, the second account paid 7 % in interest. At the end of the first year he had earned $236 in interest. How much was in each account? at 8 % at 7 %

Answer 1

4y+3 -20% -164=t2 -4/44+ 3) +16y =-12 J164- 12+ 164 =-12 ho lds for all it 20%+16y = -12 of ,y valve Crtinite Solulons -20% -16y= 12 C4y +3, y) for all ,4 it Sahsty infinite Solutions a tb 17.6 2 a + 4.2b = 11.6x 3 2at2b-17-6x2 2a + 4.2b 17-6x3 9.6 a= expensive atb: 31 00 7Cb) 8aci) 8at7b 236 00 236 I0O 24800 8a+ 8b 8at7b = 23 6 0 0 b1200 a 1900 +200 al 81.