Answer:
they all real numbers
Step-by-step explanation:
Answer:
w = 5
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
−4(w+1)=−24
(−4)(w)+(−4)(1)=−24(Distribute)
−4w+−4=−24
−4w−4=−24
Step 2: Add 4 to both sides.
−4w−4+4=−24+4
−4w=−20
Step 3: Divide both sides by -4.
-4w/-4 = -20/-4
w=5
<em>Hope this helped and plz mark as brainliest!</em>
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<em>Luna G.</em>
Answer:
Plane Speed (x) = 378 mph
Step-by-step explanation:
Equation
d = r * t
Givens
With the wind
- d = 1680 miles
- t = 4 hours
- r = x + y
Against the wind
- d = 1680
- t = 5 hours
- r = x - y
Equation
The distances are the same, so you can solve for x in terms of y and then deal with the actual distance.
(x + y)*4 = (x - y)*5 Remove the brackets on both sides
Solution
- 4x + 4y = 5x - 5y Subtract 4x from both sides
- 4y = -4x + 5x - 5y Combine
- 4y = x - 5y Add 5y to both sides
- 5y + 4y = x
- x = 9y
Solution part 2
Now take one of the distance formulas and solve for x first then y.
- (x - y)*5 = 1680 Substitute 9y for x
- (9y - y)*5 = 1680 Subtract on the left
- 8y * 5 = 1680 Multiply on the left
- 40y = 1680 Divide by 40
- y = 1680/40
- y = 42 That's the speed of the wind.
- (x - y)*5 = 1680 Substitute the wind speed for y
- (x - 42)*5 = 1680 Divide both sides by 5
- (x - 42) = 1680 / 5 Do the division on the right
- (x - 42) = 336 Add 42 to both sides.
- x = 336 + 42
- x = 378 mph Plane's speed
Q is the independent variable, and c is the dependent variable.
Answer:
20/9
Step-by-step explanation:
