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puteri [66]
3 years ago
15

40 ÷ 1 + 3 - (3x7) + 7-5

Mathematics
2 answers:
Leviafan [203]3 years ago
6 0
First, multiply the numbers in the <span>parentheses, which is </span>3 times 7 is 21.
Then divide 40 by 1. 40/1 = 40
40 plus 3 is 43, 43 minus 21 is 22.
PLus 7 minus 5 is 24. 
enot [183]3 years ago
4 0
First things first. Think of the word
PEMDAS meaning parenthesis, exponents, multiplication, division, addition, subtraction.
First you would check for parenthesis which you do (3x7) so multiply both which come out to 21.
We can skip exponents and multiplication since we have already done it or may not have it. Next is division. Multiply 40 divide by 1 which is 40 now add 3 so 43. And lastly subtract 7-5=2
Your new equation is 43-21+2. So your answer comes out to 24! Hoped this helped.
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Jet001 [13]

Answer:

The total surface area of triangular pyramid is 172 cm squared

Step-by-step explanation:

Triangular pyramid:

  • Number of faces 4.
  • Number of vertices of a triangular pyramid is 6.
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  • The surface area of triangular pyramid B+L. B= area of base, L= area of lateral surface.

Given that, the area of the base is 43 cm squared. Lateral faces with bases of 10 cm and heights 8.6 cm.

The 3 sides of the triangular pyramid is triangle in shape.

The area of triangle is \frac12 \times base \times height.

The lateral surface area of the triangular pyramid is

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=3(\frac12\times 10\times8.6) cm squared

=129 cm squared

The total surface area of triangular pyramid is

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Step-by-step explanation:

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