When you are substituting equations, all you are doing is plugging in variables. Lets do an example..something random but easy...
y = 2x - 3
4x + 2y = 10
So since 2x + 3 equals y we are going to plug in those numbers into the second equation.
4x + 2(2x - 3) = 10
Now we distribute
4x + 4x - 6 = 10
Combine like terms.
8x - 6 = 10
Add 6 to both sides.
8x = 16
Divide.
x = 2
And thats how you substitute equations.
I hope this helps love! :)
Yes, it is because a square is a <span>quadrilateral with all the the four sides congruent, but the parralelogram is also a quadrilateral with the two by two sides congruent, that means the square is a parallelogram.</span>
1.25 for every half mile.....this means it is 2.50 for every mile
3.75 + 2.50m = 12.50
2.50m = 12.50 - 3.75
2.50m = 8.75
m = 8.75 / 2.50
m = 3.5 <=== Jodi traveled 3.5 miles (or 3 1/2 miles)
Answer:
55.2°
Step-by-step explanation:
Cos(A) = 4/7
A = 55.15999542°
Answer:
Her average speed is 48 miles per hour.
Step-by-step explanation:
1. You have to do order of operations in reverse (PEMDAS in reverse)
2. Divide 36 by 3/4 which would be to multiply by the reciprocal (multiplying 36 by 4/3)
3. The answer would then be r=48