Multiply the equation 2x+7y=-1 by -2
add to othe equaiton
4x-3y=-19
<u>-4x-14y=2 +</u>
0x-17y=-17
-17y=-17
divide both sides by -17
y=1
sub back
2x+7y=-1
2x+7(1)=-1
2x+7=-1
minus 7 from both sides
2x=-8
divide both sides by 2
x=-4
x=-4
y=1
(x,y) is normal form
(-4,1) is answer
Answer:84 degrees
Step-by-step explanation:
so if a triangle is 180 degrees in total you need to find how much you need to equal that so you add 59+37=96 degrees so then you will subtract 180-96=84 degrees
Your welcome!
More than means addition
lets call our number 'x'
is means the equal sign
so we would get
x + 4 = 12
D
Answer:
The distance is 2.33 π
Step-by-step explanation:
First we have to calculate the perimeter of the circle with the following formula:
r = 14in
c = π * 2r
Now we replace the value of r
c = π * 2 * 14
c = π * 28
c = 28π
Now we have to multiply it by 30/360 which is the fraction that represents the arc over the entire circumference
28π * 30/360 = 2 1/3 π = 2.33 π
Answer:
20
Step-by-step explanation:
interior angle + exterior angle = 180°
162° + exterior angle = 180° ( subtract 162° from both sides )
exterior angle = 18°
the sum of the exterior angles of a polygon = 360° , then
number of sides = 360° ÷ 18° = 20
