1 and 4
All angles and sides are congruent:)
We know that there is a total of 900 cells, and 37 of the samples 60 are red. 900/60 is our unit rate of 15. 37 times 15 is 555. We will see 555 red blood cells in all of the cells.
555 is our answer.
Please forgive any typeos because I did this on my phone.
Answer:
The correct are is 5.5 cm².
Step-by-step explanation:
First of all, Carlos calciulated the are of the rectangle correctly, only the are unit is wrong, it should be 3 cm².
He made a mistake calculating the area of a the triangle: The area of a triangle can be calculated by multiplying the base by the height by 
.
(Comment if you want a deeper explanation on where this comes from)
He mistakenly takes 4 cm for the height, but if you look carefully the height of the triangle in this case is 4 cm - 1.5 cm = 2.5 cm.
That gives 
for the area of the triangle.
Adding those two together gets you a total area of 5.5 cm².
Answer:
Angle 1: 55
Angle 2: 110
Angle 3: 15
Step-by-step explanation:
Angle 1: x
Angle 2: 2x
Angle 3: x-40
The total degrees for all the angles in a triangle add up to 180, so we now have the equation x+2x+x-40=180. From here we solve to get 55 degrees for x, so angle 1 is 40 degrees, angle 2 is 110 (2 times 40) and the third angle is 15 (55-40).
Answer:
Hardwood = 56 bags,
Bag and Pine = 100 bags
Step-by-step explanation:
let number of bags of hardwood be x and for pine be y
4.25x+3.75y=613----equation1
x+y=156 ---equation2
rewrite equation2 as y=156-x
substitute to equation1 = 4.25x+3.75(156-x)=613
simplify to get x = 56
from equation 2, y=156-x
y=156-56 = 100
Therefore
Hardwood = 56 bags,
Bag and Pine = 100 bags
