Answer:
x > -1
Step-by-step explanation:
<u>Step 1: Distribute</u>
3(3x + 7) > 4 - 8(4 + 5x)
(3 * 3x) + (3 * 7) > 4 + (-8 * 4) + (-8 * 5x)
9x + 21 > 4 - 32 - 40x
<u>Step 2: Combine like terms</u>
9x + 21 > 4 - 32 - 40x
9x + 21 > -28 - 40x
<u>Step 3: Add 40x to both sides</u>
9x + 21 + 40x > -28 - 40x + 40x
49x + 21 > -28
<u>Step 4: Subtract 21 from both sides</u>
49x + 21 - 21 > -28 - 21
49x > -49
<u>Step 5: Divide both sides by 49</u>
49x / 49 > -49 / 49
<em>x > -1</em>
Answer: x > -1
Answer:
The probability that a friend who receives 2 greeting cards will receive at least one musical greeting card is 0.3
Step-by-step explanation:
The probability of getting a musical card = P(A) = 30 % or 0.3
Therefore probability of not receiving a plain card = P(A)' = P(B) = 100-30 or 1- 0.3 = 0.7
The probability of receiving at least one musical card when two cards are given is
P(A)×P(A) +P(A)×P(B)-P(B)×P(B) =0.3×0.3+0.3×0.7 = 0.3
The probability of receiving at least one musical card = 0.3
I can't solve it but you can enter the equation into www.quickmath.com and it will give you the answer. Hope it helps.