Answer:
9
Step-by-step explanation:
let the number be X
x multiplied by 3 will be equal to 15 + X + 3
3x = 18+X
2x = 18
x = 9
B. $85.32
~ hope this helps!
Given:
To find:
The exact value of cos 15°.
Solution:
Using half-angle identity:
Using the trigonometric identity:
Let us first solve the fraction in the numerator.
Using fraction rule:
Apply radical rule:
Using :
Answer:
Use desmos graphing calculator
Step-by-step explanation:
Answer:
The equation with slope of –5/2 and a y-intercept of –2 is
B ) –5x – 2y = 4 or
D ) 5x + 2y = –4
Step-by-step explanation:
The equation of line is given in the form:
y = m x + C
Here, m : Slope of the line
and C : Y - intercept.
Consider the given equations:
A. –5x – 2y = –4
⇒ - 2 y = -4 + 5 x
or,
⇒ slope = (-5/2) and y - intercept = + 2
B. –5x – 2y = 4
⇒ - 2 y = 4 + 5 x
or,
⇒ slope = (-5/2) and y - intercept = - 2
C. 5x + 2y = 4
⇒ 2 y = 4 - 5 x
or,
⇒ slope = (-5/2) and y - intercept = + 2
D. 5x + 2y = –4
⇒ 2 y = -4 - 5 x
or,
⇒ slope = (-5/2) and y - intercept = - 2
Hence, the equation with slope of –5/2 and a y-intercept of –2 is
–5x – 2y = 4 or 5x + 2y = –4