10 × $20 = $200
5 × $50 = $250
10 $20 gift cards, and 5 $50 giftcards
Answer:
Step-by-step explanation:
$7.25 - $5.75 = $1.50
$1.50 ÷ $0.50 = 3
Answer:
The square root of 18 is an irrational number because it cannot be expressed as a fraction.
Answer:
The survey is meaningless because of nonresponse bias.
Step-by-step explanation:
The sample who responded (567) is less than half of Hayden's blog readers (1200). So, in this case, the results were really invalidated, because of the great absence of response, and the survey cannot be taken seriously at least statistically speaking.
567---100
x------35
x≈199 people said No
y= 368 said yes
