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3 years ago

What does 21÷3+(3×9)×9+5 equal? show work below plz

Mathematics

2 answers:

igor_vitrenko [27]3 years ago

6 0

3x9=27
21/3 = 7
so
7+27x9+5
27x9=243
243+7+5
answer is 255

Bumek [7]3 years ago

5 0

21 divided by 3 = 7

+(9x3)=34 x 9+5= 34 x 14 =476

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A thermometer is taken from a room where the temperature is 24oc to the outdoors, where the temperature is −15oc. After one minu

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Solution:

Use Newton's Law of Cooling.

T = T_s + (T_0 - T_s)*e^(-kt)

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Now, we need to find this constant. We are given that after one hour, the temperature drops to 13° C in a 7°C Environment.

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Now,

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3 years ago

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The volume of titanium is 20.86 cubic inches

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From given,

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Now substitute the values into formula:

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2 years ago

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Define x :
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Let the smallest number be x.
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Construct Equation :
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Sum of these numbers is 72
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Solve for x :
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Find the numbers :
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----------------------------------------------------------------------------------
Answer : The numbers are 23, 24 and 25.
----------------------------------------------------------------------------------

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