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Readme [11.4K]
4 years ago
14

Write the equation that represents this situation and then solve it. Five less than one-half of a number is seven.

Mathematics
2 answers:
emmasim [6.3K]4 years ago
6 0
1/2x-5=7 is the answer to this problem
Damm [24]4 years ago
5 0

Answer:

Step-by-step explanation:

n

−

3

2

or

(

n

2

−

3

2

)

Explanation:

First, let's write "three less than the number". "less than the number" means to subtract from the number. So we can write:

n

−

3

.

Now we need to take one-half of this. This means to multiple by

1

2

. Taking what we previously wrote and multiplying by

1

2

gives:

(

1

2

)

⋅

(

n

−

3

)

→

n

−

3

2

or

(

n

2

−

3

2

)

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Please answer this asap
kati45 [8]

Answer:

3.6

Step-by-step explanation:

6r-5 = -3(r-2)

6r-5 = -3r+6

6r-3r = 3r

6+5 = 11

11/3 = 3.6

4 0
3 years ago
A rectangular swimming pool that is 10 ft wide by 16 ft long is surrounded by a cement sidewalk of uniform width. If the area of
cestrela7 [59]
Let 's x the width of the sidewalk.

Area of the swimming pool= 10*16=160 (ft²)
Area of the sideway+the swimming pool= (16+2x)*(10+2x) =160+155

==>160+20x+32x+4x²=160+155
==>4x²+52x-155=0
Δ=52²+4*4*155=5184=72²
==>x=(-52+72)/2=5/2 or x=a negative to exclude.

Width of the sideway=5/2 ft
so tell me if i helped
5 0
3 years ago
Kevin's work for deriving the equation of a circle is shown below. x2 + 4x = −(y2 − 20) step 1 x2 + 4x = −y2 + 20 step 2 x2 + 4x
SVEN [57.7K]
We have the following equation:
 x2 + 4x = - (y2 - 20)
 Let's review step by step:
 step 1:
 
x2 + 4x = -y2 + 20
 Answer: OK
 step 2:
 
x2 + 4x + 4 = -y2 + 20 - 4
 Answer: Wrong
 The correct step is:
 x2 + 4x - 4 = -y2 + 20 - 4
 Or equivalently:
 x2 + 4x + 4 = -y2 + 20 + 4
 Answer:
 
he did make an error in his work in step 2
7 0
4 years ago
Y/5=X<br> Solve for Y.<br><br><br> I NEED HELP ON THIS.
Luden [163]

y/5 = x

multiply by 5 on each sides

y = 5x


There you go! I really hope this helped, if there's anything just let me know! :)

8 0
3 years ago
Read 2 more answers
The sum of 1 2 and 1 5 is between 1 2 and 1. YES OR NO?
Nastasia [14]
No, the sum of 12 and 15 is 27
6 0
3 years ago
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