Answer:
x = 7/3
Step-by-step explanation:
Factors of 9 are:
3x3
9x1
Factors of 49 are:
7x7
49x1
Only 3x3 and 7x7 equal 42 when you expand it out (3x - 7)(3x - 7) = 0
x = 7/3
Answer:34
Step-by-step explanation:
Answer:
x = 10 and y = 5
Step-by-step explanation:
We are given:
the system of equations
-4x+11y=15... Equation 1
x=2y....... Equation 2
We substitute 2y for x in Equation 1
-4(2y) + 11y = 15
-8y + 11y = 15
3y = 15
y = 15/3
y = 5
Solving for x
2y = x
2(5) = x
10 = x
Therefore,
x = 10 and y = 5
Answer:
16, 100
Step-by-step explanation:
A perfect square is a number that can be achieved by multiplying a number by itself.
Example: 100 = 10 x 10, so it is a perfect square
2 is not a perfect square because it has no factors that can be multiplied with each other to equal 2. An easy way to check is to use the square root function on your calculator.
If the result is a whole number then it's a perfect square.
A reasonable function is W = 7F + 5000
Where W is the weight of the plane and F is the number of gallons of fuel.
The domain is the set of possible values for F. That is from 0 (empty tank) to 400 (full tank).
So the domain is F = [0,400], or what is equivalente 0 ≤ F ≤ 400.
The range is the set of values of W.
The minimum value of W is when F = 0 => W = 7(0) + 5000 = 5,000.
The maximum value of W is when F = 400 => W = 7(400) + 5000 = 7,800
So the range is W = [5,000 ; 7,800], pr 5000 ≤ W ≤ 7,800.
