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NARA [144]
3 years ago
7

This is math pls help 3x + 2(5x − 7)

Mathematics
2 answers:
pashok25 [27]3 years ago
7 0

Answer:

13x-14

Step-by-step explanation:

Ira Lisetskai [31]3 years ago
4 0

Answer: 13x - 14

Step-by-step explanation:

3x + 10x - 14

13x -14

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We need a rock garden with a perimeter of 12 feet and an area of 8 square feet what is the length and width
Katarina [22]

The dimensions of the rectangle can be a length of 2ft and a width of 4ft.

<h3>How to find the dimensions of the garden?</h3>

Remember that for a rectangle of length L and width W, the perimeter is:

P = 2*(L + W)

And the area is:

A = L*W

In this case, we know that the area is 8 square feet and the perimeter is 12 ft, then we have a system of equations:

12ft = 2*(L + W)

8ft² = L*W

To solve this, we first need to isolate one of the variables in one of the equations, I will isolate L on the first one:

12ft/2 = L + W

6ft - W = L

Now we can replace that in the other equation to get:

8ft² = (6ft - W)*W

This is a quadratic equation:

-W^2 + 6ft*W - 8ft² = 0

The solutions are given by Bhaskara's formula:

W = \frac{-6 \pm \sqrt{(6ft)^2 - 4*(-1)*(-8)} }{2*-1} \\\\W = \frac{-6 \pm 2}{-2}

Then we have two solutions:

W = (-6 - 2)/-2 = 4ft

W = (-6 + 2)/-2 = 2ft

If we take any of these solutions, the length will be equal to the other solution.

So the dimensions of the rectangle can be a length of 2ft and a width of 4ft.

if you want to learn more about rectangles:

brainly.com/question/17297081

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4 0
3 years ago
Please help me with this it’s due soon
KonstantinChe [14]

Answer:

39.5 degrees

Step-by-step explanation:

180-101=79

79/2=39.5

3 0
3 years ago
Read 2 more answers
Line segments JK and JL in the xy-coordinate plan both have a common endpoint J(-4,11) and midpoints at M1 (2,16) and M2 (-3,5),
OleMash [197]
The first part of the question is not needed 
we only need to know M1 and M2
(y2-y1)^2+(x2-x1)^2=(your answer)^2
(5-16)^2+(-3-2)^2=(your answer)^2
(-11)^2+(-5)^2=(your answer)^2
121+25=(your answer)^2
146=(your answer)^2
√146=12.0830459735945721
nearest tenth=12.1
6 0
4 years ago
17. A golfer takes a swing from a hill twenty feet above the cup
nadya68 [22]

Answer:

The height as a function of time is

h(t) = -(1/2)gt2 + v0t + h0

h(t) = -16t2 + 32t + 20

The ball reaches the ground when h(t) = 0

-16t2 + 32t + 20 = 0

Solve this quadratic equation for t.  You will get a positive solution and a negative solution.  Discard the negative solution, since time begins at t=0 at the moment the ball is struck.  Can you finish from here?

4 0
3 years ago
A piece of machinery valued at $250,000 depreciates at 12% per year by the fixed rate method. After how many years will the valu
densk [106]

Answer:

6.7 years (approx)

Step-by-step explanation:

7 0
3 years ago
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