Answer:
(-4,9)
Step-by-step explanation:
substitute the given value for y into the first equation
x-5(-2x+1)=-49
distribute
x+10x-5=-49
add like terms
11x-5=-49
add 5 to both sides
11x=-44
divide both sides by 11
x=-4
now plug x into into the second equation
y=-2(-4)+1
y=8+1
add like terms
y=9
Answer:
We need a picture or link
Step-by-step explanation:
Answer:

Step-by-step explanation:
Let the third side of the triangle be
.
We can apply the cosine rule to find
.

We evaluate to obtain;



We take the positive square root of both sides to obtain;

The correct answer is B.
Answer:
42÷2
Step-by-step explanation:
8/22 in simplest form would be 4/11 because 8 divided by 2 equals to 4 and 22 divided by 2 equals to 11 and 12/14 in simplest form is 6/7 because 12 divided by 2 equals to 6 and 14 divided by 2 equals to 7