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Hoochie [10]
2 years ago
9

Express as a sum: 15–7

Mathematics
2 answers:
sergeinik [125]2 years ago
7 0

We are given 15-7 here and we have to express it as sum.

Let us first understand the property to be use here.

We can write (a-b) as (a+(-b))

For example:

If we have 7-2, we can rewrite it as 7+(-2)

and then we can combine them to get 5

Now let us use the above property for our question,

We are given,

15-7

rewriting it as addition,

15+(-7)

+ and - on multiplication will be (-)

so +(-7) will remain -7 only

Answer: 15-7 = 15+(-7)

kirill115 [55]2 years ago
5 0
-7+15. this is what i think it is.
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Explanation:

There are two ways to find the actual roots:

a) Either solve the given quadratic equation to find the actual roots

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Method a is more convenient and less time consuming, so I'll be solving the given equation by factorization to find its actual roots. To find the actual roots set the given equation equal to zero and solve for x as given below:

2x^{2} +2x-24=0\\ \\ 2(x^{2} +x-12)=0\\ \\ x^{2} +x-12=0\\ \\ x^{2} +4x-3x-12=0\\ \\ x(x+4)-3(x+4)=0\\ \\ (x-3)(x+4)=0\\ \\ x-3=0, x=3\\ \\ or\\\\x+4=0, x=-4

This means the actual roots of the given equation are 3 and -4. So first option gives the correct answer.

7 0
2 years ago
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2 years ago
What is the surface area of the right cone below?
maksim [4K]

Answer:

SA=54\pi\ units^2

Step-by-step explanation:

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2 years ago
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Answer:

Step-by-step explanation:

hello :

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(n-2)² = 49  

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