Please help with this equation

Answers

Answer 1

Answer: x=12 is the answer, i have done this question before, hope i helped.

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Fill in the blank.51+7=____+51

The answer to this stuff I hate math please help

Answers

for the second one, remember LW=are for fiding the area of the base,
for cone, base=circle, so therfor V=HB/3, and B=circle=pir^2, so V=(1/3)(hpir^2)
h=17
r=6
V=(1/3)(17(3.14)6^2)
V=17(3.14)12
V=640.56
rond tenth
V=640.6
B

Answer:

....sorry

Step-by-step explanation:

for the second one, remember LW=are for fiding the area of the base,

for cone, base=circle, so therfor V=HB/3, and B=circle=pir^2, so V=(1/3)(hpir^2)

h=17

r=6

V=(1/3)(17(3.14)6^2)

V=17(3.14)12

V=640.56

rond tenth

V=640

Evaluate. (10 • 4 2)(9 6 ÷ 3)

Answers

$(10*4+2)(9+6 / 3)$ (first do the mutiplication and division)

$(40+2)(9+2)$ (add)

$(42)(11)$ (multiply)

$42 *11$

$462 \ \textless \ -answer$

first you multiply 10 and 4 because multiplication before addition and you get 40 then you add 40 and 2 to get 42 now you move to the second equation and you divide 6 and 8 because division comes before addition and you get 2 when you divide 6 and 3 now you add 9 and 2 and get 11 now you multiply 42 and 11 (because the parenthesis have nothing between them it means multiplication) and you get 462 as your answer

All the donated computers were shared equally by 5 classrooms. Which expression represents the number of computers each classroom received?

Answers

c÷5 is the answer because you are dividing blank computers by 5 classrooms

Can someone help me please

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Simplify the expression 2x+3(x-2)-3(x-6)

A. 2x + 12
B. 2x - 8
C. 8x - 24
D. 2x - 24

Answers

$2x+3(x-2)-3(x-6) \n \n 2x + 3x - 6 - 3x + 18 \ / \ expand \n \n (2x + 3x - 3x) - 6 + 18 \ / \ gather \ the \ like \ terms \n \n 2x - 6 + 18 \ / \ simplify \n \n 2x + 12 \ / \ simplify \n \n$

The final result is A) 2x + 12.

2x+3(x-2)-3(x-6)You would first distribute.So:2x+3x-6-3x+18Then you would combine like terms, like so:2x+3x-3x= 2x-6+18= 12So it'd be:2x + 12Which is answer choice AHOPE THIS HELPS!!(:

Find the enthalpy change per mole of sodium when sodium reacts with water 8 grams of sodium reacts with 227 cm of water, producing a temperature change from 298Kto 308.4 K The specific heat capacity of water is 4.18 J/K 9.

Answers

Answer:

The enthalpy change per mole of sodium when sodium reacts with water is 28.36 kJ

Step-by-step explanation:

The given parameters are;

Mass of sodium = 8 grams = 0.008 kg

Volume of water = 227 cm³ = 0.000227 m³

Initial water temperature, T₁ = 298 K

Final water temperature, T₂ = 308.4 K

Specific heat capacity of water = 4.18 J/(K·g)

Density of water = 1000 kg/m³

Mass of water = 1000×0.000227 = 0.227 kg = 227 g

Heat change, ΔH = m×c×ΔT = m×c×(T₂ - T₁)

ΔH = 227*4.18*(308.4 - 298) = 9868.144 J = 9.868 kJ

Molar mass of sodium = 22.989769 g/mol

Therefore, 8 grams contains;

8/22.989769 = 0.348 moles of Na

Which gives the enthalpy change per 0.348 moles of Na when sodium reacts with water = 9.868 kJ

Therefore, when one mole of Na reacts with water we have;

The enthalpy change per 0.348/0.348 = 1 mole of Na when sodium reacts with water = 9.868 kJ/0.348 = 28,358.3 J = 28.36 kJ.

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