Astudent estimated a mass to be 250g but upon carefully measuring it found the actual mass to be 240g. what is the percent error?

4.17%

Step-by-step explanation:

Given : A student estimated a mass to be 250g but upon carefully measuring it found the actual mass to be 240g.

The formula to find the percent error is given by :-

Hence, the percent error = 4.17%

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

17

step-by-step explanation: