Hi

PLZ HELP

Alex

Answer:

The correct option is C ) 109.5°

Therefore,

$m\angle E=109.5\°$

Step-by-step explanation:

Given:

In Triangle DEF

d = 10

e = 18

f = 12

To Find

angle E = ?

Solution:

In Triangle DEF , Cosine Rule says

$\cos E=\dfrac{f^{2}+d^{2}-e^{2}}{2fd}$

Substituting the values we get

$\cos E=\dfrac{12^{2}+10^{2}-18^{2}}{2\times 12\times 10}$

$\cos E=\dfrac{-80}{240}=-\dfrac{1}{3}$

Therefore,

$\angle E=\cos^{-1}(-0.3333)$

$m\angle E=109.5\°$ ............As it is in Second Quadrant

Therefore,

$m\angle E=109.5\°$

4 0

3 years ago

4x^2 + n (n+x) x=3 n=5

Vika [28.1K]

Mm dont know but keep trying

3 0

3 years ago

Need the answer to 0.1×n equal89.5

ASHA 777 [7]

Answer:

this has been answered before

Step-by-step explanation:

brainly.com/question/805954

8 0

3 years ago

Rectangle measures 10 inches by 5 inches. Rectangle B is a scaled copy of Rectangle Select all of the measurement pairs that cou

Reika [66]

Answer:

I would help but the thing is there is no options so sorry man

Step-by-step explanation:

4 0

2 years ago

A landscape plan includes a rectangular flower bed that is surrounded the wood planks. In the drawing, the rectangular flower be

True [87]

Step-by-step explanation:

we have

length =8in

breadth =6in

since . The length and width of the actual flower bed will be 24 times larger than the length and width in the drawing.

new

length=8×24=192in

breadth =6×24=144in

(b) What is the perimeter of the actual flower bed ? Show your work.

answer:the perimeter of the actual flower bed =2(l+b)

 =2(l+b)=2(192+144)=672in

(a) What is the perimeter of the drawing? Show your work

answer : the perimeter of the drawing

=2(8+6)=96in

(c) What is the effect on the perimeter of the flower bed with the dimensions are multiplied by 24? Show your work

perimeter of flower bed /perimeter of drawing

=96/672=1/7

<h3>perimeter of drawing is increased by 7times of perimeter of flower bed</h3>

3 0

2 years ago

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