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3 years ago

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How to Substitute 14 for b and 3 for h in the formula for perimeter of a rectangle.

1 answer:

Minchanka [31]3 years ago

8 0

b
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|. |
h |. | h
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b

Okay so I did my best to make a rectangle above. If you think about substitution, it pretty much means to replace. Like when your teacher leaves for the day so a sun comes in to replace them for the day. Since we're using 14 and 3 to replace b and h, your equation goes from b+b+h+h to find the perimeter, to 14+14+3+3.

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Evaluate 4(2a – b) when a = –1 and b = 5.

grin007 [14]

Hey There!

<h2><u>Question:-</u></h2>

$\sf \longmapsto \: 4(2a - b)$

<em>This is a algebraic expression. The values of a and b are given. The values are as follows :-</em>

a = -1

And,

b = +5 .

<h2><u>Solution</u><u>:</u><u>-</u></h2>

$\sf \longmapsto4(2a - b)$

<em>Note that </em><u>a </u><em>is multiplied with 2 that is :-</em>

$\sf \longmapsto4(2 \times a \: - b)$

<u>Now, Insert the values that is a = -1 and b = 5 :-</u>

$\sf \longmapsto4(2 \times - 1 - 5)$

Here,we need to follow BODMAS Rule.

B = Brackets

O = Orders

D = Division

M = Multiplication

A = Addition

S = Subtraction

<em>We need to solve the bracket's </em><em>calculations</em><em> </em><em>first</em><em> </em><em>as </em><em>it </em><em>is </em><em>the</em><em> </em><em>rule.</em>

<u>So, Firstly Multiply (2 × -1)</u><u> </u><u>:</u><u>-</u>

$\sf \longmapsto4( - 2 - 5)$

Note that, (-) × (-) equals to (+).

So, it will be 5+2,But as 5 is bigger number than 2, 5 contains a minus sign.So the result will be -7.

$\sf \longmapsto4( 5+ 2)$

<em>On Simplification:-</em>

$\sf \longmapsto4( - 7)$

$\sf \longmapsto4 \times (- 7)$

$\sf \longmapsto \: - 28$

______________________________________

<em>Henceforth the solution of the algebraic expression is :-</em>

$\bf \:- 28$

Option B is correct!

______________________________________

I hope this helps!

Please let me know if you have any questions.

~MisterBrian

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2 years ago

Read 2 more answers

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liberstina [14]

You can do 2(2*12) or 4(1*6), personally I think the second one is better. Hope this helps!

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3 years ago

Find the measures of the numbered angles

inessss [21]

Answer:

angle 1 is 90 degrees because of the kite theorem:

THEOREM: If a quadrilateral is a kite, the diagonals are perpendicular.

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Step-by-step explanation:

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3 years ago

Mr. And Mrs. Doran have a genetic history such that the probability that a child being born to them with a certain trait is 0.14

poizon [28]

Answer:

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Step-by-step explanation:

From the question :

p = 0.14

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Using binomial probability :

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We could also use the binomial probability calculator :

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3 years ago

Please Help me with the last three questions!<br> It is urgent!

MrMuchimi

Answers:
1. X= 0
2. X= 0
3. X=3

You can use this method to solve them step by step, hope it will help!

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3 years ago