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Evgesh-ka [11]
3 years ago
13

3) 5.6 + 0.18 - x = 0.4x

Mathematics
1 answer:
AlekseyPX3 years ago
7 0

Answer:  x=4.128571

Step-by-step explanation:

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2 years ago
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A parallelogram has a 70 degree angle and sides 6 cm and 10 cm long. How long are its diagonals?
Verdich [7]
Let the shorter diagonal be x, then
x^2 = 6^2 + 10^2 - 2 x 6 x 10 x cos 70 = 36 + 100 - 120 cos 70 = 136 - 41.04 = 94.96
x = sqrt(94.96) = 9.7 cm

The other angle of the parallelogram is 1/2(360 - 2(70)) = 1/2(360 - 140) = 1/2(220) = 110
Let the longer diagonal be y, then
y^2 = 6^2 + 10^2 - 2 x 6 x 10 x cos 110 = 36 + 100 - 120 cos 110 = 136 + 41.04 = 177.04
y = sqrt(177.04) = 13.3 cm.

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6 0
3 years ago
Divide.
Nataliya [291]

Answer:

 2/7

Step-by-step explanation:

The quotient is ...

  \dfrac{-16}{-56}=\dfrac{2\cdot8}{7\cdot8}=\boxed{\dfrac{2}{7}}

A common factor of -8 can be cancelled from numerator and denominator.

3 0
2 years ago
Help me pls pls pls​
9966 [12]

Answer:

B

Step-by-step explanation:

Plug in a x-value and see which table matches the result.  Plug in 1.

f(x) = 7 - 4.5x

f(1) = 7 - 4.5(1)

f(1) = 7 - 4.5

f(1) = 2.5

The table that matches an input of 1 with an output of 2.5 is B.

6 0
3 years ago
Simplify the expression<br> 7y − (6)2y − 12
irina [24]

Answer:

-5y-12

Step-by-step explanation:

Multiply 6 into 2y

7y-12y-12

-5y-12

6 0
3 years ago
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