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julsineya [31]
3 years ago
5

Determine the solution to the system of equations {4x+15y=40

Mathematics
1 answer:
oee [108]3 years ago
8 0

Step-by-step explanation:

4x+15y= 40-5y= 20

= 4x+15y+5y= 40-20

4x+20y= 20

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What is the area of the regular polygon shown below?
Alexxx [7]
8 times 8 so 64 is your answer :) hope this helps
7 0
2 years ago
Will be giving out brainliest to whoever can answer this first
wariber [46]

Answer:

angle BOD = angle AOC

( cuz they are vertical opposite angles )

so angle BOD = 65°

8 0
3 years ago
Which of the following functions have only one point that is not in the domain? Select all that apply. (There are 2 answers)
densk [106]

Answer:

  B.  f(x) = 3/(x^2 +2x +1)

  E.  f(x) = 5/(3+x)

Step-by-step explanation:

The above functions have denominators that are zero at one point. For B, that point is x=-1; for E, that point is x=-3. When the denominator is zero, the function is undefined, so the corresponding x-value must be excluded from the domain.

__

As written, choice D also qualifies. This is because the function written in the answer list here is ...

f(x)=\dfrac{1}{x^2}+5x+4

It will be undefined for x=0.

_____

<em>Comment on writing rational functions</em>

When the division symbol (/ or ÷) is used with a denominator that is a product or sum, that product or sum must be enclosed in parentheses. When the expression is typeset, the division bar acts as a grouping symbol. When the expression is written in text, a grouping symbol, such as parentheses, must be added.

3 0
3 years ago
The dimensions of a rectangle are such that its length is 3 in more than its width if the length were doubled and if the width w
emmasim [6.3K]

Length (L): w + 3            ⇒2(w + 3)

width (w): w                    ⇒ w - 1

Area (A) = L x w

         A = (w + 3)(w)

         A = w² + 3w

*******************************************

       A + 176 = 2(w + 3)(w - 1)

(w² + 3w) + 176 = 2(w + 3)(w - 1)

w² + 3w + 176 = 2w² + 4w - 6

        3w + 176 = w² + 4w - 6

                 176 = w² + w - 6          

                   0 = w² + w - 182

                   0 = (w - 13) (w + 14)

0 = w - 13            0 = w + 14

w = 13                  w = -14

Since width cannot be negative, disregard -14

w = 13

Length (L): w + 3   = (13) + 3   = 16

Answer: width = 13 in, length = 16 in

7 0
3 years ago
Help a girl out ?? i'm not sure how to do the equation .
LekaFEV [45]

Answer:

 Investment amount after 9 years = 14715.12$

Explanation:

 It is given to use continuous change function, A(t) = Pe^{rt}

Here P = Principal = 10500$

          r = Rate of increase = 0.0375

          t = Number of years = 9

  A(t) = Pe^{rt}\\ \\ A(t) = 10500*e^{0.0375*9}=14715.12

 So, investment amount after 9 years = 14715.12$

6 0
3 years ago
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