Francisco surveyed 65 band and orchestra students to find out which type of musical instrument each played. The results are shown on the bar graph.
Instrument Survey
Number of Students
ulu
Percussion
Brass
Woodwinds
String
Type of instrument
Based on the information in the graph, which types of instrument were chosen by 60% of
the students?
0а
percussion and brass
Oь
strings and woodwinds
Ос
percussion and strings
Od
brass and woodwinds

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.

the answer is a. q=6,r=6√2

step-by-step explanation:

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81