Dunarea si scaderea in concentrul 0-100, fara trecere peste ordin
Completează căsutele.
23
24
97
+
4 1 + 3 5
8 7 - 3 2
a două numere este 87 nung​

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

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step-by-step explanation:

step-by-step explanation:

duck you

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5