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3 years ago

Need help please thx you

Mathematics

1 answer:

erma4kov [3.2K]3 years ago

6 0

$72.

20% of 60 is 12

$12 + $60 = $72

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Given: AB ∥ DC

RSB [31]

Answer:

$A=1,720.16\ units^2$

Step-by-step explanation:

we know that

The area of the trapezoid is equal to

$A=\frac{1}{2}(DC+AB)DE$

step 1

Find the measure of angle DAE

m∠ADC+m∠DAE=180° -----> by consecutive interior angles

we have

m∠ADC = 134°

substitute

134°+m∠DAE=180°

m∠DAE=180°-134°=46°

step 2

In the right triangle ADE

Find the length side AE

cos(∠DAE)=AE/AD

$AE=cos(46\°)(40)\\AE=27.79\ units$

step 3

In the right triangle ADE

Find the length side DE

sin(∠DAE)=DE/AD

$DE=sin(46\°)(40)\\DE=28.77\ units$

step 4

Find the area of ABCD

$A=\frac{1}{2}(DC+AB)DE$

we have

$DC=32\ units\\AB=DC+2(AE)=32+2(27.79)=87.58\ units\\DE=28.77\ units$

substitute

$A=\frac{1}{2}(32+87.58)28.77$

$A=1,720.16\ units^2$

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4 years ago

Help plz.. x/6-1=1/3(9-3x)

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Step-by-step explanation:

x/6-1=1/3(9-3x)

3(x-1) = 6(9-3x)

3x-3 = 54 - 18x

3x+18x=54+3

21x=57

X=57/21

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3 years ago

In the xy coordinate plane the slope of line p is 1 2 and its x-intercept is -3. Find the equation of a line that is perpendicul

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3 years ago

Evaluate if a=3, x=2, y=5, and z=4

krok68 [10]

Answer:

Just calculate

3×2×4 ÷ (2×5)

24÷10

=2.4

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3 years ago

How to find the variables of the angles

34kurt

Answer:

y=23

x=28

Step-by-step explanation:

3y=2x+13

8y-4=180

basic algebra, solve 2nd equation then substitute

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3 years ago