Answer: d. x = 10, x = -3
Step-by-step explanation:
We will solve by factoring as asked.
Given:
2x² = 14x + 60
Subtract 2x² from both sides of the equation:
0 = -2x² + 14x + 60
Factor:
0 = −2(x − 10)(x + 3)
Zero-product property:
x - 10 = 0 x + 3 = 0
x = 10 x = -3
d. x = 10, x = -3
Answer:
Step-by-step explanation:
Let a represent the length of board a.
Let y represent the length of board b.
The total length of both is 28 feet. This means that
a + b = 28
Board b is at least 5 feet longer than board a. This means that
b ≥ a + 5
The difference between both boards is not more than 12 feet. This means that
b - a < 12
Substituting a = 28 - b into b ≥ a + 5, it becomes.
b ≥ 28 - b + 5
b ≥ 28 - b + 5
2b ≥ 28
b ≥33/2
b ≥ 16.5
16.5 - a < 12
4.5 < a
a > 4.5
The possible lengths of board a is
8 to 11.5 feet
The possible lengths of board b is
16.5 to 20 feet
p = d – 1
p = d – 2
p = d + 1
d = 2p
d = 2p – 1
d = 2p
d = 2p + 1
The pair of equations that models the relationship between p and d are expressed as: p = d + 2, and p = d - 1.
An equation is used to represent a situation using variables (letters) and figures.
"p is 2 more than d" can be expressed as: p = d + 2.
Also, we can represent the statement, "p is 1 less than d" as: p = d - 1.
Therefore, the pair of equations would be: p = d + 2, and p = d - 1.
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Answer:
Step-by-step explanation:
A construction manager needs 12 workers to complete a building project in 54 days, we can write;
12 workers = 54 days
T find the number of workers needed to complete the same project in T days, we will write;
x workers = T days
Divide both equations
12/x = 54/T
Cross multiply
12T = 54x
x = 12T/54
x = 2T/9
Hence the number of workers needed to complete the same project in T days is 2T/9 workers
The solution is: 2/3 of 24 is 16.
Here, we have,
Let the unknown number equal x.
(2/3)x = 16
You can get rid of the fractions by multiplying both sides by 3.
3(2/3)x = 16(3)
2x = 48
Then divide both sides by 2.
2/2 = 1
48/2 = 24
so, we get,
x = 24
the answer we have,
2/3 of 24 is 16.
now,
we can double check by multiplying 2/3 times 24.
This is 16. So we are correct.
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