An x axis because to make a graph you need y and x axis
The only values a cosine can have are from -1 to 1.
Eight times two equals sixteen.
two times eight equals sixteen.
four times four equals sixteen.
sixteen times one equals sixteen.
one times sixteen equals sixteen.
eight plus eight equals sixteen
Answer:
x = ± 
Step-by-step explanation:
Given
y = x² + 7 ( subtract 7 from both sides )
y - 7 = x² ( take the square root of both sides, thus
x = ± 
3x92 = 276 (first 3 exams)
average of at least 90 (90 x 4 = 360)
360 - 276 = 84
Answer
<span>she needs to score at least 84 on the fourth exam </span><span>in order to guarantee a final average of at least 90</span>