To prepare for a lab experiment, Ted is making a solution that uses two types of concentrations of HCI (hydrochloric acid): 80 ml of 50% HCI solution, and 120 ml of 20% HCI soulution. What is the HCI concentration of the mixed solution?

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

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i dont understand the question? ?

step-by-step explanation:

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step-by-step explanation: