Answer:
y= -4
Step-by-step explanation:
x+y=42. We know that x plus y equals 42.
x=2y . We also know that x equals twice y.
2y+y=42. Since we know that x=2y, we're going to replace x with 2y from the original equation, simplified would be 3y=42.
y=14. 3y=42 simplified is y=14, this is because we divided both sides by 3 (since 3 and 42 are both divisible by 3) (btw divisible by 3 simply means that it can be divided by 3)
x+14=42. Now that we know what y equals, let's replace y with 14 from the original equation.
x=28. Now that we know that x=28 and y=14, we know that y is always x/2.
When x=-8, we divide it by 2 and get, -4.
Not absolutely positive as this was all mental math, but hope this helps! :)
Answer:
Step-by-step explanation:
3x^5+6x^3
=3x^3(x^2+2)
8/9 / 4/9
=(8/9)*(9/4) Multiply by second reciprocal
=(2/1)*(1/1) Cross reduce
=2 Multiply
Answer:
D) 6x=16
Step-by-step explanation:
6 : 2 = 8 : x
=> x = 8/(6/2 )
=> x = 8/3
=> 6x = (8/3) * 6 = 8 * 2 = 16
Answer:
.25, .012, .001
Step-by-step explanation:
Divide the length by 1000
25÷1000= .25
12÷1000= .012
1÷1000= .001
