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Assoli18 [71]
3 years ago
8

Evaluate the expression for x=5, y=-3 and z=7 7 - 3y – 3z

Mathematics
2 answers:
andrew11 [14]3 years ago
7 0

Answer:

Step-by-step explanation:

7 - 3(-3) - 3(7) = 7 + 9 - 21 = 16 - 21 = -5

barxatty [35]3 years ago
5 0

Answer:

-5

Step-by-step explanation:

(Refer to image)

Plug in the y and z and use order of operations to simplify!

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Parallelogram L M N O is shown. Angle M is (3 x minus 55) degrees, angle N is (5 y) degrees, and angle O is (2 x) degrees. In pa
Rina8888 [55]

Answer:

The correct option is:

x=55 , y = 14

Step-by-step explanation:

We know about the following features of a parallelogram:

  • Opposite sides are parallel
  • Opposite side have equal length
  • Opposite angles are equal
  • Sum of all angles is 360°

For the parallelogram LMNO, <L and <N are opposite angles, <M and <O are opposite angles.

Are opposite angles are equal.

<M = <O

3x - 55 = 2x

3x - 2x = 55

x = 55

So

<M = 3x - 55 = 110°

<O = 2x = 110°

We know that the sum of angles is 360°

<L + <M + <N + <O = 360°

<L + <N + 110° + 110° = 360°

As <L and <N are opposite, both are equal. hence <L = <M = 5y

5y + 5y + 220° = 360°

10y + 220° = 360°

y = 14

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4 years ago
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