Answer: it would take them 40/13 hours
Step-by-step explanation:
If Naomi were to paint her living room alone, it would take 5 hours. it means that the rate at which she paint her living room alone is 1/5
Her sister Jackie could do the job in 8 hours. it means that the rate at which Jackie paint the living room is 1/8
If they work together, they would work simultaneously and their individual rates are additive. This means that their combined working rate would be
1/5 + 1/8 = (8 + 5)/40 = 13/40
Assuming it takes t hours for both of them to clean the room working together, the working rate per hour would be 1/t. Therefore,
13/40 = 1/t
t = 40/13 hours
Answer:
you must make an equation
Step-by-step explanation:
if you make an equation you should get the answer
B. x < -4
-2(3x + 6) > 4(x + 7)
-6x - 12 > 4x + 28
-10x > 40
X < -4
The value of the angle ∠AVB is 53°, side VB = 132.83 m, side OV = 119 m
<h3>How to find the side length from bearings?</h3>
8) From the given triangle we see that;
∠VAO = 37°
∠VBO = 64°
∠VOA = 90°
a) Now, we know that sum of angles in a triangle is 180°. Thus, for triangle AVO, we can say that;
∠VAO + ∠VOA + ∠AVB = 180°
37 + 90 + ∠AVB = 180°
∠AVB = 180° - 127°
∠AVB = 53°
b) Using triangle rules we can say that;
tan 64 = VO/BO
Similarly, we can say that;
tan 37 = VO/(100 + BO)
Dividing both equations gives;
tan 64/tan 37 = (100 + BO)/BO
2.72BO = 100 + BO
1.72BO = 100
BO = 58.14 m
Using trigonometric ratio;
58.14/VB = cos 64
VB = 132.83 m
c) OV/132.83 = sin 64
OV = 132.83 * sin 64
OV = 119 m
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Answer:
heat require for vaporize = 5873.98 kJ
Step-by-step explanation:
Given data
mass of water = 2.60 kg
Hvap = 40.7 kJ/mol
to find out
Calculate the amount of heat
solution
we know heat required for 1 mol of water to vaporize at 100 degree c is 40.7 kg
and
we know water weight of 1 mol is 18.015 gram
so mole of 2.60 kg water is = 2600 / 18.1015
that is = 144.3241 mol
so heat require for vaporize 144.3241 mol of water is = 144.3241 × 40.7
heat require for vaporize = 5873.98 kJ