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2 years ago

I am thinking of

Mathematics

1 answer:

user100 [1]2 years ago

3 0

Answer:

9 and 6

Step-by-step explanation:

Write down the system.

The two numbers are x and y.

We are therefore given:

x+y=15

x-y=3

I will solve this for elimination since it is already setup for it.

I will add the columns since both equations are in the same form.

2x+0y=18

2x =18

Divide both sides by 2:

x =18/2

Simplify:

x =9

So if x+y=15 and x=9, then y=6.

The two numbers are 9 and 6.

Test:

9+6=15

9-6=3

You might be interested in

If 2/3 = x/12, what is the value of x? A)4. B)8. C)18. D)24.

Vikki [24]

B because of what is shown above.

7 0

2 years ago

Plz help! It’s not hard I just don’t properly understand

jonny [76]

Answer:

$a_{13}=2(13)+13=39$

39 is the 13th term

Step-by-step explanation:

Okay so essentially the $a_n$ is just a substitute for x.

See how in the equation they put n into the x spot:

$y=mx+b\\a_n=mn+b\\a_n=2n+13$

They changed the variable names:

$y=a_n\\m=2\\n=x\\b=13$

Now we know what the n actually means, plus when they ask about the terms youre trying to find it's based off of that n:

When they say, 13 term, they mean $a_{13}$ which would be the 13th answer in the series. So the first term would be based off of $a_1$

$a_1=2(1)+13\\a_1=15$

So whatever number is in the n position by a is what you'll be plugging into the x spot.

$y=mx+b\\a_n=2n+13\\a_1=2(1)+13=15\\a_2=2(2)+13=17\\a_3=2(3)+13=19\\a_4=2(4)+13=21\\a_5=2(5) +13=23\\a_6=2(6)+13=25\\a_7=2(7)+13=27\\a_8=2(8) +13=29\\a_9=2(9)+13=31\\a_{10}=2(10)+13=33\\a_{11}=2(11)+13=35\\a_{12}=2(12)+13=37\\a_{13}=2(13)+13=39$

These are all the answers leading up to the 13th term they asked for, and you can continue thus same equation with whatever number you can put into the n space.

7 0

1 year ago

What are the factors of 9t^2+12t+4

yarga [219]

Answer: (3t-2)^2

Step-by-step explanation:

Well, multiply 9 and 4 together to get 36.

Now what factors of 36 add to 12? Well, 6 and 6, so let's rewrite this:

9t^2-6t-6t+4

Now group factor what you can:

3t(3t-2)-2(3t-2)

Now 3t and -2 both share the common factor of (3t-2) so you can rewrite it as:

(3t-2)(3t-2) which is:

(3t-2)^2.

Hope that makes sense or helps!

4 0

2 years ago

The graph of the function f(x) = –(x + 2)(x + 6)is shown below. Which statement about the function is true?

alexdok [17]

Answer:

See options below. No answer choice given.

Step-by-step explanation:

The graph of the function is below. What can be said about the function is the following:

Roots are -2 and -6.
Factors are (x+2) and (x+6)
X-intercepts are (-2,0) and (-6,0)
Y -intercept is (0,-12)
Parabola is concave down due to negative leading coefficient
Vertex is at (-4,4)
Axis of Symmetry is x=-4
Its a quadratic which has a parabola as its graph

3 0

2 years ago

Read 2 more answers

Can someone pls pls help meee

kirza4 [7]

Answer:

lol ok

Step-by-step explanation:

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4 0

2 years ago