The radius of circle C is 2π
He needs to score 86 in fourth test to have an average of 80.
Step-by-step explanation:
Given scores are;
76, 81 and 77
Average = 80
Let x be the fourth test score.
As we know;
Multiplying both sides by 4
He needs to score 86 in fourth test to have an average of 80.
Keywords: Average, Addition
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#LearnwithBrainly
Answer:
- <u>80 mi²</u>
- <u>63 in²</u>
- <u>32 m²</u>
- <u>44 cm²</u>
- <u>59.5 ft²</u>
- <u>48 km²</u>
Step-by-step explanation:
<u>Q1</u>
- 8 x 4 + 12 x 4
- 32 + 48
- <u>80 mi²</u>
<u>Q2</u>
- 5 x 3 + 12 x 4
- 15 + 48
- <u>63 in²</u>
<u>Q3</u>
- 4 x 2 + 8 x 3
- 8 + 24
- <u>32 m²</u>
<u>Q4</u>
- 10 x 4 + 2 x 2
- 40 + 4
- <u>44 cm²</u>
<u>Q5</u>
- 5 x 2 + 11 x 4.5
- 10 + 49.5
- <u>59.5 ft²</u>
<u>Q6</u>
- 3 x 1 + 9 x 5
- 3 + 45
- <u>48 km²</u>
Answer:
IM not too sure but i think 30
Step-by-step explanation: