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2 years ago

Classwork for Ms. O'Brien's (Root X

Mathematics

1 answer:

alexandr1967 [171]2 years ago

7 0

Answer:

4673 mm²

Step-by-step explanation:

base: 51.7 mm

height: 90.39 mm

iPhone's screen is a rectangle. The area of rectangle is calculated as base*height. Replacing with data we get:

Area of rectangle = area of the iPhone's screen = 51.7 mm * 90.39 mm = 4673.163 mm² ≈ 4673 mm²

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The sum of three odd consecutive numbers is fifty-one. What are the numbers?

Fantom [35]

Answer:

15,17,19

Step-by-step explanation:

Make an equation : $x+(x+2)+(x+4)=51$

Solve the equation: $3x+6=51$

$3x=51-6$

$3x=45$

$x=15$

Since x=15 then the second number is 17 and then 19

Hope this helps!

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3 years ago

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Yakvenalex [24]

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2 years ago

1.find the sum. (3^3+5x^2+3x-7)+(8x-6x^2+6)<br> 2. Find the Difference: (8x-4x^2+3\)-(x^3+7x^2+3x-8)

vlada-n [284]

$(3^3+5x^2+3x-7)+(8x-6x^2+6)=\\\\=27\ \underline{+\,5x^2}\ \underline{ \underline{+\,3x}}-7\ \underline{\underline{\,+8x}}\ \underline{-\,6x^2}+6=\\\\=-x^2+11x+26$

or if you mean (3x^3+5x^2+3x-7)+(8x-6x^2+6):

$(3x^3+5x^2+3x-7)+(8x-6x^2+6)=\\\\=3x^3\ \underline{+\,5x^2}\ \underline{ \underline{+\,3x}}-7\ \underline{\underline{\,+8x}}\ \underline{-\,6x^2}+6=\\\\=3x^3-x^2+11x-1$

$(8x-4x^2+3)-(x^3+7x^2+3x-8)=\\\\=\underline{8x}\ \underline{\underline{-\ 4x^2}}+3-x^3\ \underline{\underline{-\,7x^2}}\ \underline{-\,3x}+8=\\\\=-x^3-11x^2+5x+10$

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2 years ago

Devon had a length of rope that was 4.78 meters long. He cut a 1.45 meter length from it. How much rope does he have left

Inessa [10]

The answer would be 3.33 meters.

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2 years ago

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