Answer:
x = 2
Step-by-step explanation:
OK so lets do it together.
2x = -2x + 8
Subtract 8 from both sides
2x - 8 = -2x
Add 2x to both sides
4x - 8 = 0
Add 8 to both sides
4x = 8
Divide each side by 4
x = 2
Check:
4 = -4 + 8
4 = 4
correct
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Answer: 2nd one.
Step-by-step explanation:
The equation that can be used to find out the total time it will take to William to mow the lawn is (75n) / 100=33.
<h3>What is an equation?</h3>
This is a mathematical expression that represents a situation including a value that is not known.
In this case the best equation would be 75n / 100=33 as this is the only one that includes all the factors:
- 75% out of a 100% that is unknown (n)
- 100 (represents the percentage)
- 33 (total of minutes completing 75%)
<h3>What is the result of this equation?</h3>
- 75n / 100=33
- n/ 100 = 33/75
- n/100 =0.44
- n= 0.44 x 100
- n = 44 minutes
Learn more about equations in: brainly.com/question/10413253
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The angle of depression is 29.0521°. So it is a safe landing.
Step-by-step explanation:
Step 1:
The plane is flying at a height of 25,000 feet and 45,000 feet away from the landing strip. Assume it lands with an angle of depression of x°.
So a right-angled triangle can be formed using these measurements. The triangle's opposite side measures 25,000 feet while the adjacent side measures 45,000 feet. The angle of the triangle is x°.
To determine the value of x, we calculate the tan of the given triangle.
Step 2:
The length of the opposite side = 25,000 feet.
The length of the adjacent side = 45,000 feet.
So x = 29.0521°. Since x < 30°, it is a safe landing.
