Answer:
x = 7
Step-by-step explanation:
3x - 4 = 2x + 3
3x - 2x = 3 + 4
x = 7.
Answer:
4
Step-by-step explanation:
80%=4/5
4/5 of 20 is 4
They lose 4 matches.
3x = -7 Divide both sides by 3. 3 goes into seven twice with one-third left over. Since it's a negative seven, the answer will also be negative.
x = -2
She must win the next 8 consecutive games to get 80% and after that loose the next 12 games to get to 50%.
<h3>How to find the probability of winning?</h3>
She has won 8 out of 12 days. Thus, percentage of winning is;
P(winning) = 8/12 * 100%
P(Winning) = 75%
To arrive at 80% winning, it means that the number of extra consecutive games she must win is;
(8 + x)/(12 + x) = 80/100
10(8 + x) = 8(12 + x)
80 + 10x = 96 + 8x
2x = 16
x = 8
Thus, she must win the next 8 consecutive games to get 80%.
For her to get to 50% after that, it means that;
(16 - x)/(20 - x) = 50/100
(16 - x)/(20 - x) = 1/2
2(16 - x) = 20 - x
32 - 2x = 20 - x
x = 12
Read more about Probability of winning at; brainly.com/question/24756209
#SPJ1
