<img src="https://tex.z-dn.net/?f=9x%5E%7B2%7D" id="TexFormula1" title="9x^{2}" alt="9x^{2}" align="absmiddle" class="latex-form

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chubhunter [2.5K]

3 years ago

ula"> + $3x^{2}$

Mathematics

2 answers:

Marina86 [1]3 years ago

7 0

9x²＋3x²
＝(9＋3)x²
＝12x²

Hope my answer helped u :)

sweet-ann [11.9K]3 years ago

3 0

Answer:

12x^2

Step-by-step explanation:

All you need to do is combine like terms

since 9x^2 and 3x^2 are like terms with the same variable and same degree, they can be combined to get 12x^2

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Please help me. i want to have this finished.

Anuta_ua [19.1K]

We know that y is equal to x-2. We can just substitute x-2 for y since y is equal to it.

10x- 9(x-2)=24

Distribute.

10x- 9x+18= 24

x+18= 24

Subtract 18 on both sides.

x= 6

Now, plug in x.

y= (6)-2

y= 4

We can check this to see if this works:

4= 6-2, 4=4

10(6)- 9(4)= 24

60-36= 24, 24=24

x=6 and y=4

I hope this helps!
<em>~kaikers</em>

5 0

3 years ago

A bag contains five red marbles, four blue marbles, and four yellow marbles. You randomly pick a marble. What is the probability

Vikentia [17]

n(s)= 5+4+4=13

n(e)= red + blue

=5+4

so, p(e) = n(e)/n(s)

p(e)= 9/13

=0.69

it's your answer

it will help.

7 0

3 years ago

anie was asked to bring water for her daughter's soccer team. The coach told her he wants each player to drink 1 8 gallon of wat

Hoochie [10]

Answer:

1 gallon and one pint I hope this helps and I hope it's not wrong

7 0

3 years ago

Read 2 more answers

Someone help me pleaseee

natta225 [31]

Answer:

11.25

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A company that produces dog food claims that its bags contain 11 kg of food. From

andriy [413]

By testing the hypothesis we can conclude that the bag does not contain 11 kg of food.

Given mean of 10.6 kg, population standard deviation of 0.6 and sample size of 25.

We are required to find whether the company is right in saying that their bags contain 11 kg of food.

First we have to make hypothesis.

$H_{0}$ :μ≠11

$H_{1}$ :μ=11

We have to use t statistic because the sample size is less than 30.

t=(X-μ)/s/ $\sqrt{n}$

We will use s/ $\sqrt{n}$ =0.6 because we have already given population standard deviation of weights.

t=(11-10.6)/0.6

=0.4/0.6

=0.667

Degree of freedom=n-1

=25-1

=24

T critical at 0.05 with degree of freedom 24=2.0639

T critical at 0.05 with degree of freedom is greater than calculated t so we will accept the null hypothesis.It concludes that the bags donot contain 11 kg of food.

Hence by testing the hypothesis we can conclude that the bag does not contain 11 kg of food.

Learn more about t test at brainly.com/question/6589776

#SPJ1

3 0

2 years ago