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devlian [24]
3 years ago
9

What is 28.7 rounded to the nearest whole number?

Mathematics
2 answers:
artcher [175]3 years ago
8 0

Answer:

29

Step-by-step explanation:

enot [183]3 years ago
3 0

Answer:

29

Step-by-step explanation:

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Cassandra shared her post with 3 friends, who each shared it with 3 more friends. They continued sharing at the same rate.
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F(3) = 3(3)
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3 years ago
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-3x + 2y = 21<br> -4x + y = 23
Nady [450]

Answer:

2y = 3x + 21

y = 1.5x + 10.5

plug in, in the second equation

- 4x + (1.5x + 10.5) = 23

-4x + 1.5x + 10.5 = 23

-2.5x + 10.5 = 23

-2.5x = 12.5

x = 12.5/-2.5 = -5

y = 1.5 (-5) + 10.5 = 3

x = -5

y = 3

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3 years ago
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Please answer this fast
Inessa [10]

Answer:

Step-by-step explanation:

23x-12-4x+5x

24x-12  combine the 23x-4x+5x to get 24x

19-14+3x+12x

15x+5     19-14=5   3x+12x=15x

6x+19-14x+9

-8x+28    -14x+6x= -8x   19+9=28

3 0
3 years ago
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Find the value of x for which the function y = x5-x³ + x² - 1 has a local minimum.
melisa1 [442]

The given function presents a local minimum in the coordinates (0,-1).

<h3>Factoring</h3>

In math, factoring or factorization is used to write an algebraic expression in factors. There are some rules for factorization.  One of them is a factor out a common term for example: x²-x= x(x-1), where x is a common term.

For solving this question, the given equation should be rewritten  from the factoring.

x^5-x^3+x^2-1=\left(x+1\right)^2\left(x-1\right)\left(x^2-x+1\right)=0. Then, you have 3 equations.

From the Zero Factor Principle, you can write

Equation 1

(x+1)²=0

x+1=0

x= -1

Equation 2

x-1=0

x=1

Equation 3

x²-x+1=0

x_{1,\:2}=\frac{-\left(-1\right)\pm \sqrt{\left(-1\right)^2-4\cdot \:1\cdot \:1}}{2\cdot \:1}\\ \\ x_{1,\:2}=\frac{-\left(-1\right)\pm \sqrt{3}i}{2\cdot \:1}

From these points it is possible to plot a graph and you can see that the local minimum presents the coordinates (0,-1).

Read more about the factoring here:

brainly.com/question/11579257

#SPJ1

7 0
2 years ago
I needa an answer?! It would really help &lt;3 <br><br><br> Thank you a lot!!!
Zarrin [17]

Answer:

C. 2.865

Step-by-step explanation:

All you have to do in this situation is to subtract the amount he ran two weeks ago by the amount Thomas ran last week. It would look like so,

38.074 - 35.209

And once you do that you get the answer of 2.865

Hope that helps and have a great day!

6 0
3 years ago
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