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Ede4ka [16]
3 years ago
10

All I really need is a formula on how to solve the question and a explanation on how its solved.8 x + 13 y = 2

Mathematics
1 answer:
timama [110]3 years ago
6 0
Since y = x - 2, replace the y in 8x + 13y = 2 with x - 2:

8x + 13(x - 2) = 2

Simplify the equation by multiplying 13 by (x - 2):

8x + 13x - 26 = 2

Add 26 on each side:

8x + 13x = 28

Add like terms:

21x = 28

Divide by 21 on each side:

x = 28/21

Simplify the fraction:

x = 4/3

Now that we have solved for x we can now use it to plug into one of the equations to solve for y. Plug in 4/3 for x in y = x - 2:

y = (4/3) - 2

Subtract:

y = -2/3

Let's check the work to make sure it is right:

8(4/3) + 13(-2/3) = 2
32/3 + -26/3 = 2
6/3 = 2
2 = 2

As you can see the system of equations has been solved correctly.

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2.6 + 9.2 x 4 would equal, <u><em>39.4</em></u>

4 0
2 years ago
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Kiesha can install a fence in 3 days. Robert can install the same fence in 8 days. How long, in days,
tankabanditka [31]

Answer:

5.5 days

Step-by-step explanation:

you need to find the average between them so add them up and divide by 2.

4 0
3 years ago
Use a known maclaurin series to obtain the maclaurin series for the given function. f(x = 8x2 tan?1(7x3
11Alexandr11 [23.1K]
Going out on a limb here and guessing that the function is

f(x)=8x^2\tan^{-1}(7x^3)

Please correct me if this isn't the case.

Recall that

\tan^{-1}x=\displaystyle\sum_{n\ge0}\frac{(-1)^nx^{2n+1}}{2n+1}

which converges for |x|.

It follows that

8x^2\tan^{-1}(7x^3)=8x^2\displaystyle\sum_{n\ge0}\frac{(-1)^n(7x^3)^{2n+1}}{2n+1}
=\displaystyle\sum_{n\ge0}\frac{56(-49)^nx^{6n+3}}{2n+1}
6 0
4 years ago
1.
lord [1]

Okay I'm not sure which you need help with but.

First one, it means how did you feel about how the worksheets were set up

Then, about what you learned

How you felt about tests

And for the last one you could say thing like

How you felt about obstacles, the teachers/professors, pressure, how much you think you learned, how you feel at the end of the school year versus the beginning, or how you grew as a student/person. You can pick one or two or your own, those are just some ideas.

How is this your last day at school? You are quite lucky

6 0
3 years ago
Complete the table of inputs and outputs for the function
Anon25 [30]

Answer:

x >>>>>>>> f(x)

–9 >>>>>> 10

–7 >>>>>>> 0

0 >>>>>>>> –35

5 >>>>>>>> –60

Step-by-step explanation:

f(x) = –5(x + 7)

1. x = –9, f(x) =?

f(x) = –5(x + 7)

f(x) = –5(–9 + 7)

f(x) = –5(–2)

f(x) = 10

2. f(x) = 0, x =?

f(x) = –5(x + 7)

0 = –5(x + 7)

Divide both side by –5

0 / –5 = x + 7

0 = x + 7

Collect like terms

x = 0 – 7

x = –7

3. x = 0, f(x) =?

f(x) = –5(0 + 7)

f(x) = –5(7)

f(x) = –35

4. f(x) = –60, x =?

f(x) = –5(x + 7)

–60 = –5(x + 7)

Divide both side by –5

–60 / –5 = x + 7

12 = x + 7

Collect like terms

x = 12 – 7

x = 5

SUMMARY:

x >>>>>>>> f(x)

–9 >>>>>> 10

–7 >>>>>>> 0

0 >>>>>>>> –35

5 >>>>>>>> –60

4 0
3 years ago
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