Answer:
perimeter=6x+10
area=2x^2+2x-24
Step-by-step explanation:
perimeter=2x+8+x-3+2x+8+x-3
area=(2x+8)(x-3)
Answer:
false negatives - 2%
false positives - 3%
Step-by-step explanation:
Here is the complete question :
A test to detect an infection gives a positive result 98% of the time when an infection is present. It is 97% accurate when an infection is not present.
% of results will be false negatives, and % of results will be false positives.
False negative means a negative result which in actuality it is positive
False negative = 100% - percent of positive result
100% - 98% = 2%
False positive result means a positive result which in actuality is negative
False positive = 100% - percent of false positive
100 - 97 = 3%
The ratio given is 3:7 where nonfiction:fiction.
To find the new ratio, divide 3 from 240.
240 / 3 = 80
Now multiply 80 by 7.
80 x 7 = 560
The new ratio is 240:560
If there are 240 nonfiction books then there are 560 fiction books.
To find the total, add these together.
240 + 560 = 800
There are 800 total books
(50,45)(125,37.50)
slope(m) = (37.50 - 45) / (125 - 50) = -7.5/75 = -0.1
y = mx + b
slope(m) = -0.1
(50,45)...x = 50 and y = 45
now we sub and find b, the y int
45 = -0.1(50) + b
45 = - 5 + b
45 + 5 = b
50 = b
so ur equation is : y = -0.1x + 50
so it the staff sells 150 yearbooks...
y = -0.1x + 50
y = -0.1(150) + 50
y = -15 + 50
y = 35 <== price per yearbook
We are simply going to use direct proportion.
The smaller cake is 2/3 the larger cake: let it be = (2/3)S. Let S be size of large cake
I would assume that the bottom tier refers to the larger cake.
Therefore, the bottom tier requires 3/5 cup of water.
Therefore, large cake size S requires (3/5) cup of water,
That means, small cake size, (2/3)S would require....
= 2/3 * 3/5
= 2/5 cup of water.
Therefore, Marcus is correct.