Please help me please please I really need help please please
1 answer:
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Answer:
15 years old.
Step-by-step explanation:
Let Jim's age now be one unit (1u).
His uncle's age now is then 4 units.
Jim's age in 10 years = 1u + 10
Jim's uncle's age in 10 years = 4u + 10
In 10 years, Jim's uncle's age will be 20 years more than twice Jim's age.
Twice Jim's age =
Since Jim's uncle's age is 20 years more than this, we can say that his uncle's age is equal to
which is equal to
We found out that Jim's uncle's age in 10 years is 4u+10. Hence
We subtract 10 from both sides:
Therefore
and one unit is 15. Hence, Jim's age now is 15.
Answer:
The value of a which equation have 2 , -
Step-by-step explanation:
Given expression as :
2 a - 4 x = 4 - a² × x
The equation lies in the interval ( - 8 , - 2 )
∵ equation lies in the interval , so it must satisfy the equation
So , 2 a - 4 × ( - 8 ) = 4 - a² × ( - 8 )
Or, 2 a + 32 = 4 + 8 a²
Or, a + 16 = 2 + 4 a²
So, equation can be written as :
4 a² - a - 14 = 0
Or, 4 a² - 8 a + 7 a - 14 = 0
Or, 4 a ( a - 2 ) + 7 ( a - 2 ) = 0
Or, ( a - 2 ) ( 4 a + 7 ) = 0
∴ a = 2 And -
Hence The value of a which equation have 2 , - Answer
Answer:
Step-by-step explanation:
(1)
Dividing both sides by will give us the answer:
(2)
Subtracting both sides by will give us the answer:
(3)
First let's multiply both sides by
Now, let's divide both sides by to get our answer:
(4)
Dividing both sides by will give us the answer: