Answer:
x = 2
Step-by-step explanation:
Change the right side so that it is in base 3 notation:
3^(3x - 2) = 81 = 3^4
Now both sides have the same base, we can now solve the following:
3x - 2 = 4 ---> x = 2
Answer:
he need to recipcoal it -17.8*6/1
Step-by-step explanation:
Answer:
(3, -3)
Step-by-step explanation:
To solve for a system of equations, use substitution.
First, solve for one variable in an equation.
2x - 3y = 15
Add 3y to both sides.
2x = 3y + 15
Divide both sides by 2 to get x by itself.
x = 1.5y + 7.5
Put this in the other equation.
5x + 2y = 9
Substitute the variable.
5(1.5y + 7.5) + 2y = 9
Distribute the 5 inside the 1.5y + 7.5.
7.5y + 37.5 + 2y = 9
Combine like terms.
9.5y + 37.5 = 9
Subtract 37.5 from both sides.
9.5y = -28.5
Divide both sides by 9.5.
y = -3.
Now take this value and put it in the other equation to get your x.
2x - 3y = 15
Substitute variable.
2x - 3(-3) = 15
Multiply.
2x + 9 = 15
Subtract 9 from both sides.
2x = 6
Divide both sides by 2.
x = 3.
Your pair is (3, -3).
The answer to this question is:
What is relation between yards feets and inches ?
1 yard = 36 inches and 1 feet = 12 inches
Solution: We know that
price for x inches wire = y
price for 1 inch wire = y/x
Now we can conclude that Emily purchased 24 feet wire
which means 24 feet = 24*12 inches
= 288 inches of wire
Total cost that emily has to pay = $ 288(y/x)
similarly Andy need 11 yards of wire which means
= 11*36 inches = 396 inches of wire
Total cost that Andy has to pay is $396(y/x)
To learn more about conversions between yards inches etc kindly click below link:
https://brainly.ph/question/9708986
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Answer:
20 mph
Step-by-step explanation:
time = distance / speed
speed up stream = s - 4
speed down stream = s + 4
time up = time down
8 / (s - 4) = 12 / (s + 4)
cross multiply
8s + 32 = 12s - 48
subtract 8v from both sides
32 = 4s - 48
add 48 to both sides
80 = 4s
Divide both sides by 4
20 = s
20mph