Answer:
360°
Step-by-step explanation:
degrees are needed
Answer:
See attached picture.
Step-by-step explanation:
The solution set on a graph is the graph or drawing of the function. For this quadratic function, it is the U-shaped graph called a parabola. Graph the equation by finding the x-intercepts and vertex.
The function factors into (x+4)(x+5). So the x-intercepts are -4 and -5.
The vertex of the function is found using -b/2a. Here that is -9/2 = -4.5. This is the x value of the vertex. The y-value is found by substituting x = -4.5 into the function.
(-4.5)^2 + 9(-4.5) + 20
20.25 - 40.5 + 20
Graph three points at (-4,0), (-5,0) and (-4.5, -0.25).
See attached picture for the graph.
Answer:
840 ways.
Step-by-step explanation:
The order is important, which means that the permutations formula is used to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:
In this question:
4 items from a set of 7, so:
840 ways.
Answer:
The second one
Step-by-step explanation:
4x-y=14
4(y+2) -y=14
4y+8-y=14
3y=14-8
3y=6
y=2
x=2+2
x=4
4/5
Step-by-step explanation:
9x+1=5
or, 9x=5-1
or, 9x=4
therefore x=4/5