To compound 50% solution in which proportion must 95% sol and 30% sol be mixed to make 500 ml

we use the rectangle rule

95-50=45 parts of 95% solution

50-30=20 parts of 30% solution

45x+20x=500

65x=500

x=500/65

x=7.69

45x=346.15ml of 95% solution

20x=153.84ml of 30% solution

69.23% of 95% solution

and 30.77% of 30% solution

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

step-by-step explanation:

graph using a few selected

x         y

-1       15

0         6

1         2.4

2       0.96