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SashulF [63]
3 years ago
10

I don't know what to do

Mathematics
1 answer:
cestrela7 [59]3 years ago
4 0
56 is the answer cause you use 7*8=56 so i hope that helps

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The perimeter of a rectangle is 48 centimeters. The relationship between the length, the width, and
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1. Length is 14 cm
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3. Not completely sure about 3
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Step-by-step explanation:

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What is the product? to (5r+2)(3r-4)
Nady [450]

using distributive property you should get

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3 years ago
Evaluate the expression for x = 5, y = 3, and z = 14 . 5x−6y+20z over 4yz Enter your answer in the box.
spin [16.1K]

Hello from  MrBillDoesMath!


Answer:   1 17/24


Steps:

          Evaluate             (5x-6y+20x)/ 4yz when x = 5, y = 3, z = 14


          (5(5) - 6(3) + 20(14))   / 4 (3)(14)          (Substitute in values)

       = (25   - 18    +280)       / 4 (3) (14)         (Evaluate products)

       =  (287) /  4 (3) (14)                                (Evaluate expressions)

      =  287/ 168                                             (4 (3)(14) = 168)

      =  (168  + 119 ) /168                                 287 = 168  + 119

      = (168)/168 + 119/168

      = 1              + 119/168

      = 1  119/168          

       BUT 119 = 17 * 7  (surprise!)  and 168 = 12 * 7 * 2 so answer

    =  1 (17*7)/(12*7*2)

    =  1 (17)/(12*2)                               (Cancel 7's)

    = 1 (17/24)                                    


Regards, MrB    


3 0
3 years ago
The length of a rectangle is 5 centimeters less than twice its width. The perimeter of the rectangle is 26 cm. What are the dime
iris [78.8K]

Let w and l be the length and height of the rectangle.

We know that:

\begin{cases}l = 2w-5\\2(l+w)=26\end{cases}

Substitute the first equation in the second:

2(l+w)=26 \iff l+w=13 \iff 2w-5+w=13 \iff 3w = 18 \iff w=6

Use the first equation to compute the length:

l=2\times 6 - 5 = 12-5=7

So, length = 7 cm; width = 6 cm

8 0
3 years ago
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