Answer:
She must make a score of 42 in the final exam to obtain an average of 80.
Step-by-step explanation:
Hi there!
Let x be the score of the final exam, the equation will be as follows (remember that the score of the final counts double):
(82 + 79 + 75 + 2x)/4 = 80
Let´s solve the equation for x multiplying each side of the equation be 4:
82 + 79 +75 + 2x = 320
Substract 82, 79 and 75 to both sides of the equation:
2x = 320 - 82 - 79 -75
2x = 84
x = 84/2
x = 42
She must make a score of 42 in the final exam to obtain an average of 80.
Have a nice day!
To find the area of the slice of pie, you will represent the part of the pie as 37/360 because this is the fractional part that was cut. Multiply this by the total area of the circle to get the area of this one slice.
A = 37/360 x pi x r^2
37/360 x 3.14 x 17.5^2
A = 98.8 square feet
The approximate area of the slice was 98.8 square feet. That is one big pie!!
To find the area of a rectangle, simply multiply the length by the width.
2/5 * 1/3 = 2/15
So, the area is 2/15.
Answer:
3 and 1/2 a day
Step-by-step explanation:
first we begin with a sequence.
8 up 2 down
26-8 = 18 +2 =20
20-8+2 =14
14-8+2=8
8-8
we would not add/subtract 2 because he is out of the well
3 and 1/2 days.
