Answer:
-1
Step-by-step explanation:
Answer:
-6
Step-by-step explanation:
(-10) - (-4)
-10 +4 (because negative multiply by negative is positive)
= -6 (because -10+4 means different signs means you subtract and get the sign of the bigger number)
Answer:
Surface are = 94.24 cm2
Cylinders =4,244
Step-by-step explanation:
Hi, to answer this question we have to apply the next formula:
Surface area of a cylinder = 2π (diameter/2) h + 2π (diameter /2)²
Replacing with the values given
s = 2π (2/2) 14 + 2π (2/2)²
s = 87.96+ 6.28 =94.24 cm2
Since:
1 m2 = 10,000 cm2
40 m2 = 400,000 cm2 (area that one can of paint covers)
We have to divide the area that one can of paint covers by the surface area of each cylinder:
400,000/94.24 = 4244 cylinders
I think it is 45.5. 1/2 base*height. (9*9 = 81. 81/2 = 45.5.
L=W+7
W=1/3L
we can substitute the width in the first relation with 1/3L
L=1/3L+7
we move1/3L to the left
L-1/3L=7
we multiply by 3 to remove the denominator
3L-L-21
2L=21
L=21/2=10.5cm
