Answer:
Y = -2, X = 4
Step-by-step explanation:
When you first use the elimination method, you would multiply 2x-y = 10 by -2 so that you could get the 4x to be eliminated.
4x-3y = 22
(2x-y = 10)-2 = -4x + 2y = -20
When you add those 2 together you are left with -y = 2, which you divide by negative to get y = -2. Then you substitute -2 for y to solve for x. I substituted the bottom equation
2x - (-2) = 10
2x +2 = 10
2x = 8
Divide both sides by 2 to get x = 4.
Answer:
BC ≈ 19.4 cm
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos71° = = = ( multiply both sides by BC )
BC × cos71° = 6.3 ( divide both sides by cos71° )
BC = ≈ 19.4 cm ( to 3 significant figures )
Answer:
2 seconds
Step-by-step explanation:
When the ball hits the ground, its height (h) will be 0. You can therefore set up the following equation:
Factor:
Since the time must be positive, it hits the ground after 2 seconds. Hope this helps!
Answer:B
Step-by-step explanation:
Answer:
The answer is triangular prism.
Step-by-step explanation:
Triangular prism has exactly three rectangular faces.
<u>Triangular Prism:</u>
Triangular prisms are three-dimensional solids formed by putting rectangles and triangles together. It is a polyhedron made of a triangular base, a translated copy, and 3 faces joining corresponding sides. A right triangular prism has rectangular sides, otherwise it is oblique.It is a three dimensional shape with two parallel congruent circular faces whose cross sections (taken parallel to these circular faces) are circular....