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Yuri [45]
3 years ago
12

Which operation should be performed first according to the order of operations? 21 – 5 + 24 ÷ 3 + 90 • 4

Mathematics
2 answers:
allochka39001 [22]3 years ago
7 0

Answer:

\boxed{=384}

Step-by-step explanation:

<u><em>I'll give you a hint. You had to used pemdas stands for: p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtract that came from left to right.</em></u>

First you had to multiply and divide from left to right.

21-5+24/3+90*4

21-5+8+90*4

90*4=360

21-5+8+360

Then you add and subtract from left to right.

21-5=16

16+8+360

16+8=24

24+360=384

Final answer: \boxed{=384}

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

-Charlie

Ann [662]3 years ago
3 0
According to Order of operation, we perform: Divide then multiplication then subtraction, then sum.

In short, Your Answer would be Option C) 24To remember use PEMDAS P=parenthesis E=Exponents M=Multiply D=Divise A=Addition S=Subtraction Since you do not have parenthesis or exponents you must first multiply / 3

GOOD LUCK AND HOPE IT HELPS U
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The diagram shows the cross-section of a wall of a cinema. It has to be painted. Work out the area that needs to be painted.
mestny [16]

Answer:

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Cost to paint = £105

Step-by-step explanation:

Area of the wall of a cinema hall = Area of a trapezoid (1)+ Area of a rectangle (2) + Area of a trapezoid (3)

Area of a trapezoid = \frac{1}{2}(b_1+b_2)h

where b_1 and b_2 are the parallel sides and h is the distance between these sides.

Area of trapezoid (1) = \frac{1}{2}(11+12)\times 6

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Area of the rectangle (2) = Length × Width

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                                         = 180 m²

Area of the trapezoid (3) = \frac{1}{2}(12+10)\times 11

                                         = 121 m²

Now area of the wall = 69 + 180 + 121

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One tin covers the area = 25 m²

Number of tins required to paint the wall = \frac{\text{Total area}}{\text{Area covered by one tin}}

= \frac{370}{25}

= 14.8

Therefore, number of tins to be purchased = 15

Cost to paint the complete wall = 15 × £7

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8 0
3 years ago
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Degger [83]

Answer:

the image is not clear dear, please write another question with a clear image or type it

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3 years ago
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