Answer:
D, 5
Step-by-step explanation:
Answer:
h = 1.4
c = 2.8
Step-by-step explanation:
For each problem, remember the special triangle side ratios then use a proportion. To solve, isolate the variable.
For the triangle with the variable h:
Since two of the angles are 45, this is an isosceles triangle. All isosceles triangles have two equal sides that are not the hypotenuse.
In a right isosceles triangle, the ratio for regular side to hypotenuse is 1 to √2.

h = √2
h ≈ 1.4
For the triangle with the variable c:
The is an equilateral triangle cut in half because the angles are 30 and 60.
The side ratio of altitude to hypotenuse is √3 to 2.

c = 2√2
c ≈ 2.8
Sum/5 = 90
so Sum = 450 which should be divided by 6
450/6 = 75 as the real average.
Answer: -1
Step-by-step explanation:
1. add the numbers
2. add 8 to both sides
3 add the numbers
4. divide both sides of the equation by the same term
5. divide the numbers then cancel the terms that are in both the numerator and denominator then move the variably to the left
The vertices of the original quadrilateral can be written in matrix form using the vertex matrix. The vertex matrix is

To find the coordinates of the endpoints or vertices of the image of the given coordinate points reflected about the y-axis, we just need to multiply the transformation matrix by the vertex matrix. The transformation matrix for this particular problem is

Multiplying the two matrices, we have

Therefore, the coordinates of the endpoints or vertices of the image are
(5,4), (1,-1), (3, -6) and (7, -3).