Answer:
x is 6
Step-by-step explanation:
<h3>
Answer: 127</h3>
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Explanation:
The phrasing "2/3 of 4/5 of his 2nd exam on his 3rd test" is a bit clunky in my opinion. It seems more complicated than it has to be.
The student got 80 on the second exam. 4/5 of this is (4/5)*80 = 0.8*80 = 64. Then we take 2/3 of this to get (2/3)*64 = 42.667 approximately. If we assume only whole number scores are given, then this would round to 43.
Let x be the score on the fourth exam. Since 5 points of extra credit are given, the student actually got x+5 points on this exam.
So we have these scores
- first exam = 70
- second exam = 80
- third exam = 43
- fourth exam = x+5
Adding up these scores and dividing by 4 will get us the average
(sum of scores)/(number of scores) = average
(70+80+43+x+5)/4 = 80
(x+198)/4 = 80
x+198 = 4*80
x+198 = 320
x = 320 - 198
x = 122
So the student got a score of x+5 = 122+5 = 127 on the fourth exam.
D is wrong. It can't have 2 angles equal to or greater than 90.
2x + 116.6 = 180
2x = 180 - 116.6
2x = 63.4
x = 63.4/2
x = 31.7 Two of this size are the only possible answers.
This isn't as hard as it looks.
The ratio is 1 to 12.
You just have to multiply the model value by 12.
12 x 5.4 = 64.8 feet. Now, the answer has to be in yards, so divide by 3.
64.8 div 3 = 21.6 feet.
Answer:
14.86%
Step-by-step explanation:
The principal = $5800
Time = 5 years
Amount = $ 11600
From;
A= P(1 + r)^n
Substituting values;
11600=5800(1 + r)^5
Rate= (11600/5800)^1/5 - 1
Rate= 0.1486
Therefore
Rate= 14.86%
