To solve for the variables y and x we substitute the second equation into the first meaning that y = -x +2 you substitute y for (-x+2)
so
(-x +2) = x +4
add x to both sides
2 = 2x + 4
subtract 4 from both sides
-2 = 2x
divide by 2
-1 = x
now plug x back into the original equation
y = (-1) + 4
y = 3
and
y = -(-1) + 2
y = 1 +2
y = 3
there you have it x = -1 and y = 3
Hope this helps ;)
Solve for x:
3 sqrt(x + 8) = -4
Divide both sides by 3:
sqrt(x + 8) = -4/3
Raise both sides to the power of two:
x + 8 = 16/9
Subtract 8 from both sides:
x = -56/9
3 sqrt(x + 8) ⇒ 3 sqrt(8 - 56/9) = 4:
So this solution is incorrect
The solution is incorrect:
Answer: (no solutions)
Answer:
g=1.5
Step-by-step explanation:
you want to eliminates the 2/5 so you do that by dividing it by itself (since you do the opposite equation) you do this on both side (so do 2/5 divided by itself, and 3/5 divided by 2/5) getting you 1.5 therefore all you have on the left side if this equation is g so g=1.5
First, let's make two variables to assign to both girls.
m = Maria's number of crayons
c = Corrine's number of crayons
Since Maria has twice as many crayons as Corrine, we know that the number of crayons Maria has is the number of Corrine's crayons multiplied by two.
Knowing this, we can make the expression <u>m = 2c</u>