Answer:
b= = - 7/4 or -1.75
Step-by-step explanation:
14b +21 -2b=0
12b +21=0
12b= -21
b= -21/12
b= - 7/4 or -1.75
By solving a quadratic equation we will see that the egg will hit the ground after 1.58 seconds.
<h3>
How long will take the egg to reach the ground?</h3>
Here we know that the initial height of the egg is 40ft, so the equation for the height will be:
The egg will hit the ground when h(t) = 0, so we need to solve the quadratic equation:
This means that the egg will hit the ground after 1.58 seconds.
If you want to learn more about quadratic equations:
brainly.com/question/1214333
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The length of the other leg of the right triangle is; 89.44 centimetres
<h3>Right triangles and the Pythagoras theorem</h3>
According to the question;
- We are required to determine the length, in centimetres of the other leg of the right triangle.
By the Pythagoras theorem;
Hence, It follows that;
Find the square root of both sides of the equation;
x = 89.44 centimeters
Read more on Pythagoras theorem;
brainly.com/question/343682
Answer:
<u>-7/4 or -1 3/4</u>
Step-by-step explanation:
Step 1. Convert into improper fraction.
2 1/2 = 5/2
Step 2. Convert the fractions into common denominator.
5/2 = 10/4
Step 3. Subtract.
3/4 - 10/4 = -7/4