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LiRa [457]
3 years ago
6

PLS HELP WILL MARK BRAINLIEST, NO FAKE ANSWERS

Mathematics
2 answers:
kupik [55]3 years ago
8 0

Answer:

1.   4a + 5b;   2.  6p + 4r;    3.  -22y - 3x

Step-by-step explanation:

1. (4a + 5b) + (2a - 6b) - 2(a - 3b)

  (4a + 5b) + (2a - 6b)  + (- 2a + 6b)         Distributive

 (4a + 2a -2a) + (5b - 6b + 6b)                 Combine like terms

  4a + 5b

 2.  2(5p - q + 2r) - (p + 4q + 3r) - 3(p -2q - r)  

       10p - 2q + 4r - p - 4q - 3r - 3p + 6q + 3r

       (10p - p -3p) + (-2q - 4q + 6q ) + ( 4r - 3r + 3r)

         6p + 0 + 4r

          6p + 4r

3.    - (9y + x) + 2(x - 6y) - (4x + y)

         -9y - x  + 2x - 12y - 4x - y

        (-9y -12y -y) + (-x + 2x - 4x)

           -22y - 3x

     

Semenov [28]3 years ago
7 0

Answer:

1. 4a+5b

2. 6p+4r

3.  -20y-3x

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HELP ASAP PLEASE!!!
nikklg [1K]

Answer:

Option C is correct.

Step-by-step explanation:

An exponential function is of the form:  y =a(b)^x ....[1] where a is the initial value, x is any real number and b is the growth factor  

Also, the b value (growth factor) has been replaced either by (1 + r) or by (1 - r).

Then, the growth "rate" (r) is determined as b = 1 + r.

and the decay "rate" (r) is determined as b = 1 - r

  • If b> 1, then it is exponential growth function.
  • if 0<b< 1. then it is exponential decay function.

Also, b = 1+ 4

Given the equation:  y = 50(1.15)^x

On comparing given equation  with [1] we get;

a = 50 and b = 1.15

Since, b = 1.15 > 1

Therefore, the given equation represents the exponential growth.

(A)

Yes, this y = 50(1.15)^x equation represents the exponential growth.

(B)

Initial value (a) = 50

(C)

Here growth factor, b = 1.15

and

1+ r = 1.15.

⇒r = 0.15\%




3 0
3 years ago
What is the answer to this equation 2/3x +7= 5
nadezda [96]

Answer:

x = -3

Step-by-step explanation:

\frac{2}{3} x + 7 = 5\\\frac{2}{3} x = 5 - 7\\\frac{2}{3} x = -2\\x = -2 / \frac{2}{3}\\x = -2 * \frac{3}{2}\\x = -6/2\\x = -3

5 0
4 years ago
Read 2 more answers
Select the correct answer. to solve this system of equations using substitution, what could be substituted in place of y in the
Rina8888 [55]

To use substitution to evaluate this system of equations, the y value to be substituted is 2x - 7.

<h3>What is method of substitution?</h3>

The algebraic method for solving simultaneous linear equations is the substitution method. The values of one variables from one expression is substituted with in second equation, as the name implies.

Now according to the question;

The expressions are as follows;

4x = 5 – 2y and y – 2x + 7 = 0

To solve the following system of equations, we must determine what substitution must be made in place of y in the first equation.

Let us now deduce the value of y from the second equation.

y – 2x + 7 = 0 ⇒ y = 2x – 7

We now have the y value, which we can plug into the first equation;

⇒ 4x = 5 – 2(2x – 7)

4x = 5 – 4x + 14

4x + 4x = 5 + 14

8x = 19

x = 19/8

Substitute the value of x in y to get its value.

y = 2×(19/8) - 7

y = -9/4

Thus, the values obtained for the given set of equations are-

x = 19/8 and y = -9/4 by method of substitution.

To know more about method of substitution, here

brainly.com/question/22340165

#SPJ4

3 0
2 years ago
It take 23 minutes for 6 people to paint 6 walls, how many minutes does it take 9 people to paint 9 walls
Delvig [45]

I would set up a ratio problem

23 minutes/6 people = x/9 ppl

cross multiply

207 = 6x

x = 34.5 minutes

6 0
3 years ago
As part of a science experiment, a student observes the growth of a population of bacteria in four different media. The table be
Margaret [11]

Answer:

Step-by-step explanation:

Here is the graph and I’m not sure if my answer is correct or not

8 0
3 years ago
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