Answer:
400 students were surveyed.
Answer:
D: [0,8]
R: [0,3]
Step-by-step explanation:
The domain is the x-values covered by the graph, while the range is the y-values. So to find each, find the lowest and highest x and y value; since this graph is continuous the domain and range will include all values between these points. In this case, the lowest x is 0 and the highest is 8; the lowest y is 0 and the highest is 3. Then to write the answer write is from least to greatest, finally, surround the point by a parenthesis or bracket. The difference is that parenthesis means the value is not included while a bracket means it is. On this graph all points are included, therefore brackets should be used.
Answer:
(-3±√61)÷2
Step-by-step explanation:
First we expand the brackets to give us :
x²+5x-14 = -1 +2x
Now we make this into the quadratic format (x²+ax+b=0) by subtract -1 and 2x from both sides :
x²+3x-13 = 0
This quadratic cannot be factorized so we must use the quadratic formula :
x = or x =
a = 1 , b = 3 , c = -13
Now we simplify as much as possible by first substituting values known :
x = or x =
Now we evaluate the exponent :
x = or x =
Now we multiply the numbers :
x = or x =
Now we add the numbers :
x = or x =
Now we multiply the denominator:
x = or x =
So our final answer is (-3±√61)÷2
Hope this helped and <u>5 stars, a heart and brainliest please</u>
Answer:
-1
Step-by-step explanation:
24-5^2 = 24-5•5 = -1