I don’t understand how to do these problems and I have a test on them tomorrow. Pls help

1) y+3x=24

5y+3x=36

(equations i got by reading the question)

do simultaneous equations steps

  y+3x=24

-5y+3x=36

= -4y = -12

  4y =12

y=3

2)Total sold = (155 cups for) $265

  small=$1.25

  large=$2.50

(large = 2*small)

1.25+2.50

= 3.75

3.75*x=265

x=70.666666666666666666666666666667

70.666666666666666666666666666667 *1.25 =88.33333333333333333333333

70.666666666666666666666666666667 *2.5=176.66666666666666666666666666667

approx sold:

small : 88

large: 177

3)14x+17x=99

31x=99

x=3.1935483870967741935483870967742‬

14*x=44.709677419354838709677419354839‬

17*x=54.290322580645161290322580645161‬

14x+17x=99

44.709677419354838709677419354839‬+54.290322580645161290322580645161‬ = 99

didn't have enough time for 4 and 5 sorry

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.

hello,

as   long as they add up to 180 its correct.