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Genrish500 [490]
4 years ago
10

-3(n+5)=12 What does n equal?

Mathematics
1 answer:
ivolga24 [154]4 years ago
6 0
Distribute -3 to get rid of the parentheses.
Add 15 to both sides.
Now divide -3 on both sides.
You have your answer!
-3(n+5)=12
<u />-3n-15=12
     +15 +15
<u>-3n</u>=<u>27
</u>-3     -3
n=-9 <u /><u>
</u><u />


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The figure below shows a tent with wires attached to help stabilize it. The length of each wire is 8 feet greater than the dista
Anestetic [448]

Answer:

The length of 2 wires are 13 feet and 12 feet [i don't know if the 3rd side is a wire, if so, the length is 5 feet]

Step-by-step explanation:

<em>The image of the tent is attached.</em>

<em />

As we can see, it creates a right triangle with "x+8" side being the hypotenuse of the triangle.

The pythagorean theorem tells us:

Hypotenuse^2 = Leg^2 + Leg^2

THe hypotenuse is "x+8", the two legs are "x" and "x+7" respectively. Let's solve for x:

(x+8)^2=(x+7)^2+x^2

We expand and solve for x:

(x+8)^2=(x+7)^2+x^2\\x^2+16x+64=x^2+14x+49+x^2\\x^2+16x+64=2x^2+14x+49\\x^2-2x-15=0\\(x-5)(x+3)=0\\x=5,-3

Length can't be negative, so x = 5.

Hence, the 3 sides of the triangle are:

x = 5

x + 8 = 13

x + 7 = 12

The length of 2 wires are 13 feet and 12 feet

8 0
3 years ago
A square has one side that is 7 inches long. What is the area of the square?​
Anna007 [38]

Answer:

49

Step-by-step explanation:

with a square all sides are equal so if one side is 7 the other is 7 so you would do 7 * 7

hope this helps

7 0
4 years ago
If 139 is added to a number, the result is 44 less than four times the number. Find the number. Step 1 of 2: Use the variable x
lorasvet [3.4K]

Answer:

73

Step-by-step explanation:

let the number = X

If 139 is added, it becomes= X +139

the result becomes 44less than four time the number

= 4(39)-44 = 156-44 =112

the set up equation becomes

X +39 = 112

solving for the value of X

X = 112-39

X = 73

4 0
2 years ago
HELP QUICK PLEASE!!!!
makvit [3.9K]
X y is the one for that
7 0
3 years ago
5 points
mezya [45]

Answer:

d = 1/5t

Step-by-step explanation:

Since it is a direct variation , Let d represent the distance and t represent the time ,then

d ∝ t

introducing the proportionality constant, we have

d = kt

Substituting t = 10 and d = 2 , we have

2 = 10k

k = 1/5

substitute k = 1/5 into the original equation , we have

d = 1/5t

Step-by-step explanation:

7 0
3 years ago
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