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dmitriy555 [2]
2 years ago
15

3 lines are shown. A line with points C, A, F intersects a line with points E, A, B at point A. A line extends from point A to p

oint D in between angle E A F. Angle C A E is 61 degrees, angle D A F is 90 degrees, and angle F A B is 61 degrees. Find the following angle measures. mAngleEAD = ° mAngleCAB =

Mathematics
2 answers:
Naddika [18.5K]2 years ago
5 0

Answer:

m\angle EAD=29^{\circ} and m\angle CAB=119^{\circ}

Step-by-step explanation:

It is given that m\angle CAE=m\angle FAB =61^{\circ}

and m\angle DAF=90^{\circ}

To find: m\angle EAD\ and\ m\angle CAB

Now, since Line CAF and EAB intersect each other therefore,

m\angle CAB=m\angle EAF  (vertically opposite angles are equal) ...(1)

Now, m\angle BAC+\angle EAC = 180 ^{\circ}  (Sum of linear pair)

m\angle CAB= 180 ^{\circ}-m\angle EAC

m\angle CAB= 180 ^{\circ} -61^{\circ}=119^{\circ}

Now From eq. (1)

m\angle CAB=m\angle EAF =119^{\circ}  (vertically opposite angles are equal)

m\angle EAF= m\angle EAD+m\angle DAF

m\angle EAD= m\angle EAF-m\angle DAF

m\angle EAD= 119^{\circ}-90^{\circ}=29^{\circ}

       

Simora [160]2 years ago
4 0

Answer:

EAD = 29°

CAB = 119°

Step-by-step explanation:

On ED :)

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An open-top bin is to be made from a 15-centimeter by 40-centimeter piece of plastic by removing a square from each corner of th
lord [1]

Answer:

The size of the square is  \frac{10}{3} cm by  

Step-by-step explanation:

<em>To find the side of the square which removing from each corner of the plastic and makes the volume of the bin maximum assume that the side of the square is x and write the formula of the volume in terms of x, then differentiate it and equate the differentiation by 0 to find the value of x</em>

∵ The dimensions of the piece of plastic are 15 cm and 50 cm

∵ The side of the square which removed from each corner is x cm

- That means each dimension will be less by 2x (x from right and

    x from left)

∴ The dimensions of the base of the bin are (15 - 2x) , (40 - 2x)

∴ The height of the bin is x

The formula of the volume of the bin is V = l × w × h

∵ The volume of the bin V = (15 - 2x)(40 - 2x)(x)

- Multiply the two brackets at first

∵ (15 - 2x)(40 - 2x) = (15)(40) + (15)(-2x) + (-2x)(40) + (-2x)(-2x)

∴ (15 - 2x)(40 - 2x) = 600 + (-30x) + (-80x) + 4x²

- Add the like terms

∴ (15 - 2x)(40 - 2x) = 600 - 110x + 4x²

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Now differentiate V with respect to x

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- Equate the differentiation by 0

∴ 600 - 220x + 12x² = 0

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∴ 12x² - 220x + 600 = 0

- Use your calculator to solve the quadratic equation and give

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∴ x = 15  <em>OR </em> x = \frac{10}{3}

<em>One of them will give the maximum volume and the other will give the minimum volume to find that fin V" and substitute the values of x on it if the answer is negative then the volume is maximum if the answer is positive, then the volume is minimum</em>

∵ V' = 600 - 220x + 12x²

∴ V" = -220 + 24x

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∴ V" = -220 + 24(15) = 140 (positive value)

∴ x = 15 gives the minimum volume

- Substitute x by \frac{10}{3}

∴ V" = -220 + 24( \frac{10}{3} ) = -140 (negative value)

∴ x =  \frac{10}{3} gives the maximum volume

∴ The side of the square is \frac{10}{3} cm

The size of the square is  \frac{10}{3} cm by  \frac{10}{3} cm

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2 years ago
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Dimas [21]
These equations do match up. All you have to do is find the solution to the first equation. After that, plug in that solution to the second equation. If it makes the equation true, then the equations match. 

Hope this helps!
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Answer:

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Step-by-step explanation:

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Reduced:

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Answer:

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