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Ray Of Light [21]
3 years ago
14

Quadrilateral CDEF is a rhombus. What is ECF?

Mathematics
1 answer:
romanna [79]3 years ago
4 0

Answer:

Step-by-step explanation:

∠ECF=\frac{1}{2}(180-114)=\frac{1}{2}(66)=33°

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Consider the linear system of equations. y = –x + 9 y = 0.5x – 6 If the solution is (a,–1), what is a? a =
Nadusha1986 [10]

Answer:

The value of a is 10.

Step-by-step explanation:

We are given with the following pair of the linear system of equations below;

y = -x+9  and   y = 0.5x-6.

Also, the solution is given as (a, -1).

To find the value of 'a', we have to substitute the solution in the equation because it is stated that (a, -1) is the solution of the given two equations.

So, the x coordinate value of the solution is a and the y coordinate value of the solution is (-1).

First, taking the equation;

y = -x+9

Put the value of x = a and y = -1;

(-1) = -(a) + 9

a = 9 + 1 = 10

Now, taking the second equation;

y = 0.5x-6

Put the value of x = a and y = -1;

(-1) = 0.5(a)-6

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0.5a = 5

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Since we get the value of a = 10 from the equations, so the value of a is 10.

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beks73 [17]

Answer:

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Step-by-step explanation:

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