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svetoff [14.1K]
3 years ago
14

I need help on this question:

Mathematics
1 answer:
lara [203]3 years ago
6 0
2x+2x+7x+7x= 18x

18x= perimeter

a triangle has 3 sides

18x÷3=6x

one side of the triangle=6x
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Solve the system using substitution and describe your steps. <br> x=y-3 <br> 2x+y=12
Veseljchak [2.6K]
First you plug in for x,

2(y-3)+y=12

Then you solve for y
2y-5+y=12
-10y+y=12
-9y=12
-9y/9=12/-9
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5 0
3 years ago
The blue figure is rotated 90° counterclockwise around the origin and then reflected across the x-axis. In which quadrant will t
puteri [66]

Answer:

the answer is B the image will be in quadrant III

Step-by-step explanation:

7 0
3 years ago
An observation deck extends 120 feet out above a valley. The deck sits 70 feet above the valley floor. If an object is dropped f
Rzqust [24]

Answer:

2

Step-by-step explanation:

The height formula given is:

h = -16t^2 + 70

That means the object will be initially (t=0) at the height 70 feet, from where it will be dropped.

If we want to know the time when the object will be at height 6 feet, we just need to use h=6 in the equation, and then calculate the value of t:

6 = -16t^2 + 70

16t^2 = 64

t^2 =4

t = 2 s

So, it will take 2 seconds for the object to be 6 feet above the valley floor.

8 0
3 years ago
A compound inequality is graphed and its graph consists of all real numbers. Which of the following could have resulted in this
Feliz [49]
"r < 3 or r > 2" is the one among the following choices given in the question that <span>could have resulted in this solution set. The correct option among all the options that are given in the question is the fourth option or option "d". I hope that this is the answer that has actually come to your desired help.</span>
4 0
3 years ago
What is the product of (x+1) (x+4)
Lostsunrise [7]
X(x+1) 1(x+4)
x^2+x+x+4
x^2+2x+4
8 0
4 years ago
Read 2 more answers
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