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pochemuha
3 years ago
14

System of equations 12x-5y=-20 y=x+4

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0
12x-5(x+4)=-20
12x-5x-20=-20
12x-5x=-20+20
7x=0
X=0
Y=0+4=4
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Please help me in this question
weqwewe [10]
Question is: how many 84s will fit in 5376? Let's think about some easy multiples:

84 * 100 = 8400, so it's too big
84 * 10 = 840, so it might work

84 | 5376 | 10
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84 | 4536 | 10
       -840

84 | 3696 | 10
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84 | 2856 | 10
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84 | 2016 | 10
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84 | 1176 | 10
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84 | 336

We can't fit any more 840 in 336, so we check how many 84s are in 336 and what's the remainder:

84 | 336 | 4
     - 336

So there's no remainder. Now we add all the partial quotients to get the final result:

10 + 10 + 10 + 10 + 10 + 10 + 4 = <u>64

</u>
It's correct, I checked it with calculator. I just hope you'll be able to read something from that, it's quite difficult to do partial dividing with no pencil and paper :)
3 0
3 years ago
John opens a savings account with $1,000 that compounds interest daily. The APR at the time John deposits the account is 3.5%. H
3241004551 [841]
\bf \qquad  \qquad  \textit{Annual Yield Formula}&#10;\\\\&#10;\qquad \qquad \left(1+\frac{r}{n}\right)^{n}-1&#10;\\\\&#10;\begin{cases}&#10;r=rate\to 3.5\%\to \frac{3.5}{100}\to &0.035\\&#10;n=&#10;\begin{array}{llll}&#10;\textit{times it compounds per year}\\&#10;\textit{daily, so in a year is 365}&#10;\end{array}\to &365&#10;\end{cases}&#10;\\\\\\&#10;\left(1+\frac{0.035}{365}\right)^{365}-1

you'll get a decimal format, just multiply it times 100, to get the % format
6 0
3 years ago
Read 2 more answers
Chau will rent a car for the weekend. He can choose one of two plans. The first plan has an initial fee of $44 and costs an
wariber [46]

Answer:

I don't know

Step-by-step explanation:

i don't know

7 0
3 years ago
Help lol <br> question 1 and 2 <br> 15 points
DiKsa [7]

Answers:

  1. Choice B) y = (1/4)x
  2. The unit rate is <u>  3.89  </u> dollars per pound. It costs <u>  23.34  </u> dollars for a turkey that weighs 6 pounds.

=====================================================

Explanations:

  1. Direct proportional equations are always in the form y = kx, where k is some constant. In the case of choice B, we have k = 1/4. Visually, direct proportion equations are always straight lines and go through the origin.
  2. Divide $34.99 over 9 to get 34.99/9 = 3.88777 approximately. This rounds to 3.89, so it costs $3.89 per pound. That's the unit rate. Multiply this by 6 to get 6*3.89 = 23.34 which is the cost of the 6 pound turkey.
6 0
3 years ago
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The velocity v of the flow of blood at a distance r from the central axis of an artery of radius R is given below, where k is th
andrew11 [14]
The average rate of blood flow is given by

\displaystyle\frac1{R-0}\int_0^Rv(r)\,\mathrm dr=\frac kR\int_0^R(R^2-r^2)\,\mathrm dr
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=\dfrac kR\left(R^3-\dfrac13R^3\right)
=\dfrac{2kR^2}3
3 0
3 years ago
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