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OLEGan [10]
3 years ago
10

Is 12x + 24 equation to 3(4x+8

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
3 0
Yes, because 3×(4x)= 12x (3 times 4 is 12. add the "x" and you have 12x) and 3×8=24 . If you put the two together, you get 12x+24 as the expression. ^_^
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How many time does 2 go into 19
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3 years ago
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:

Area = 370 m²

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

                                  = 69 m²

Area of the rectangle (2) = Length × Width

                                         = 12 × 15

                                         = 180 m²

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

                                         = 121 m²

Now area of the wall = 69 + 180 + 121

                                   = 370 m²

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

                                                       = £105

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3 years ago
(2+x)(2−x)?? helppppppp
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You can find one the picture I send




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2 years ago
Read 2 more answers
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