Answer:
15 of $3 books and 4 of the $8 books
Step-by-step explanation:
15×3= 45
8 × 4= 34
45+32= 77
Substitution method
y = x + 3 (*)
y = 3x + 1 (**)
Substitute (*) to (**):
3x + 1 = x + 3 <em>subtract 1 from both sides</em>
3x = x + 2 <em>subtract x from both sides</em>
2x = 2 <em>divide both sides by 2</em>
<h3>x = 1</h3>
Put the value of x to (*):
y = 1 + 3
<h3>y = 4</h3><h3>Answer: x = 1 and y = 4 → (1, 4).</h3>
Sin0= y/r
X= -4 and r= 9 (radius is also the hypotenuse)
In quadrant II y is positive
X^2 +y^2 = r^2
-4^2 + y^2 = 9^2
16 + y^2 = 81
Y^2 = 81-16
Y^2 = 65
Y= sqrt65
Sin0= sqrt65/9
Answer:
A is the answer brainliest?
Step-by-step explanation: