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Hoochie [10]
3 years ago
9

Express as a sum: 15–7

Mathematics
2 answers:
sergeinik [125]3 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]3 years ago
5 0
-7+15. this is what i think it is.
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qwelly [4]

We must create the equation from the information. Well, we know that there is a 75 dollar fee right off the top, and there is the word "plus" in the information meaning there will be adding.

1. Add the given cost plus the addition sign.

75 + ___ = ?

Now, we must find out what fills in "__." It says that it costs $20 per hour to rent the limo. However, it doesnt tell you how many hours it is being rented for, however it does say that the amount of hours is represented by T. So, fill in that information.

2. Fill in the second number.

75 + 20T = ?

Since there isn't a number to finish the second number to the equation, we know that there isn't going to be a completed answer. So, fill in the final cost with "c" as explained in the equation.

3. Write the answer.

75 + 20T = c

So, the equation to this problem is:

75 + 20T = c

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5 0
3 years ago
10x - 9y + 5x - 4y - 5x + 4x
Vadim26 [7]

Answer:

16x-5y

Step-by-step explanation:

5 0
4 years ago
What is a perfect square? Why is <img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B%208x%20%2B16" id="TexFormula1" title="x^{2}
ivanzaharov [21]

Answer:

It is a perfect square. Explanation below.

Explanation:

Perfect squares are of the form

(

a

+

b

)

2

=

a

2

+

2

a

b

+

b

2

. In polynomials of x, the a-term is always x.(

(

x

+

c

)

2

=

x

2

+

2

c

x

+

c

2

)

x

2

+

8

x

+

16

is the given trinomial. Notice that the first term and the constant are both perfect squares:

x

2

is the square of x and 16 is the square of 4.

So we find that the first and last terms correspond to our expansion. Now we must check if the middle term,

8

x

is of the form

2

c

x

.

The middle term is twice the constant times x, so it is

2

×

4

×

x

=

8

x

.

Okay, we found out that the trinomial is of the form

(

x

+

c

)

2

, where

x

=

x

and

c

=

4

.

Let us rewrite it as

x

2

+

8

x

+

16

=

(

x

+

4

)

2

. Now we can say it is a perfect square, as it is the square of

(

x

+

4

)

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3 0
3 years ago
Factor out the greatest common monomial: 8x3 y2 - 12x2 y3 + 28x2 y
Zina [86]
Yes xy(8x2 y - 12xy2 - 7x) is the number you would use for the equation of the formula to figure out the mathematical term you would perhaps use if the values located inside the equation were numerous.
3 0
4 years ago
In the problem 12+58=70,12 and 58 are called factors true or false
Marat540 [252]

Answer:

false

Step-by-step explanation:

4 0
3 years ago
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