Evaluate 3 |a| +5| b| if a=−2; b=−1 |2x−3y| if x=0.5; y=−0.7 4 |a| +8−a if a=−2 −3|x|+2x−1 if x=−5

1. 11, 2. 3.1, 3. 18, 4. -26

Step-by-step explanation:

1. |-2*3|= |-6| 6 -1*5= -5 |-5| = 5 6+5 = 11 For the first one the answer is 11

2. 0.5*2= 1 -0.7*3 = -2.1.              1-(-2.1)=3.1 |3.1|= 3.1 the 2nd problem answer is 3.1

3.  a= -2 absolute value of -2 = 2  2*4=8 8+8-a= 8+8-(-2) = 18

4.  x=-5 |x| = 5 -3*5= -15 2x= -10    -15+-10-1 = -26

Please give me brainliest it is all correct

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

answer: ratio of volume of cone (with 3 times the height and equal diameter) to volume of cylinder is 2 to 1. the value of π is not used.

step-by-step explanation:

radius is diameter/2 = 4.

area of circle is π r^2.

volume of cylinder is height × area of base = hπr^2 = 3(4^2) π = 48π cubic inches.

not knowing the formula for volume of cone, i calculate it using calculus (which is for calculating things).

volume of cone is integral 0 to h area(y) dy. area(y) is π r(y)^2. r(y) runs r to zero as y runs zero to h, r(0) = r, r(h) = 0.

r(y) = r - r/h y

area(y) = π (r - r/h y)^2 = π (r^2 - 2r^2y/h + r^2y^2/h^2) = π r^2(1-2y/h+y^2/h^2)

antiderivative area(y) = π r^2 (y-y^2/h+y^3/(3h^2))

integral 0 to h = π r^2(h-h^2/h+h^3/(3h^2) - (0)) = π r^2(h - h + h/3) = π r^2(h/3) = π/3 r^2 h

volume of this cone is π/3(4^2)18 cubic inches.

= 6 16 π = 96π cubic inches.

cone has twice the volume, 96/48.

cone height is 6 times the cylinder.

ratio of volume formula: π r^2 cancels.

cone over cylinder ratio is 6h/3 to h, 2 to 1.