Answer:
a. 47
b. 87
c. 127
Step-by-step explanation:
Assume a total of 4 exams ( first 3 plus a final)
Let final score be X,
Hence, average score = (85 + 71 + 77 + x) / 4 = (233 + x) / 4
a) to get a C, the average score must be 70
70 = (233 + x) / 4
(233 + x) = 70 (4) = 280
x = 280 - 233 = 47 (Ans)
b) to get a B, the average score must be 80
80 = (233 + x) / 4
(233 + x) = 80 (4) = 320
x = 320 - 233 = 87 (Ans)
c) to get a A, the average score must be 90
90 = (233 + x) / 4
(233 + x) = 90 (4) = 360
x = 360 - 233 = 127 (Ans)
<h3>
Answer: True</h3>
More specifically, these two triangles are congruent by the SAS congruence theorem. SAS stands for Side Angle Side.
- The first "S" is the pair of sides that have double tickmarks
- The "A" refers to the congruent vertical angles
- The second "S" is the pair of sides that have triple tickmarks
Answer:
Meera is 10 years while her mom is 40 years
Step-by-step explanation:
Meera nother is 4 times as old as meera
After 5 her mum will be 3 times as old as her
The first step is to calculate Meera age
4x+5= 3(x+5)
4x +5= 3x+15
Collect the like terms
4x -3x= 15-5
x= 10
Meera mother age can be calculated as follows
= 4x
= 4×10
= 40
Hence Meera is 10 years and her mom is 40 years
Answer:
-4.6
because you add whats inside teh parenthesis then subtract by 12 before dividing by 23