Answer:
B. Solve each equation for a variable
Is (-1,13) a solution of the system: Yes it is x =1, y= 13
Step-by-step explanation:
-4x=30-2y
- 15 = - 2y + 11x
-4x=30-2y
-2y+4y = -30-------------------i
- 2y + 11x= - 15 ---------------ii
make x the subject of formula in equ i
-4x=30-2y
x= (30-2y)/-4
insert x= (30-2y)/-4 in equ ii
- 2y + 11x= - 15
-2y+ 11((30-2y)/-4)= -15
-2y+(330-22y)/4 = -15
-8y+330-22y/4 = -15
-8y-22y+330/4= -15
cross multiply
-30y+330 = 4x-15 = -60
-30y = -60-330
-30y =--390
y= -390/-30 = 13
if y = 13
x = (30-2y)/-4 = (30-2x13)/-4 = (30-26)/4 = 4/4 = 1
x=1 , y=13
Solution:
<u>To classify a triangle a </u><u>scalene right:</u>
- It must have different side lengths
- It must have a right angle
<u>This triangle is a </u><u>Scalene Right</u><u> because:</u>
- It has different side lengths.
- It has a right angle.
<u>In conclusion...</u>
This triangle is a Scalene Right.
Answer:9
Step-by-step explanation:
You have to add it together
Answer:
The answer is below
Step-by-step explanation:
A satellite orbits the earth at a height of 343 kilometers. If it makes 8 revolutions around the earth, how many kilometers does it travel? Earth's diameter is 6371 kilometers. Use pi = 3.14.
Solution:
To determine the distance covered by the satellite, we have to first get the distance from the center of the earth to the satellite.
The diameter of the earth = 6371 km, hence the radius of the earth = 6371/2 = 3185.5 km
The distance from the center of the earth to the satellite = radius of earth + height of satellite from earth = 3185.5 + 343 = 3528.5 km
The distance travelled in one revolution = 2 * 3.14 * 3528.5 = 22158.98 km
The distance travelled in 7 revolution = 7 * 22158.98 km = 155112.86 km
