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Novay_Z [31]
3 years ago
8

2X plus Y equals 7 3X minus 4Y equals five

Mathematics
1 answer:
Dvinal [7]3 years ago
7 0
\left \{ {{2x+y=7\ \ | *4} \atop {3x-4y=5}} \right. \\\\ \left \{ {{8x+4y=28} \atop {3x-4y=5}} \right. \\+----\\Addition\ method\\\\
11x=33\ \ \ | divide\ by\ 11\\
x=3\\\\y=7-2x\\
y=7-2*3=7-6=1\\\\Solution:\\ \left \{ {{y=1} \atop {x=3}} \right.
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Ricardo borrows $1,850 for 10 months at an interest rate of 12.25%. What amount will
jonny [76]

9514 1404 393

Answer:

  $2038.85

Step-by-step explanation:

The value of the loan at that point is given by ...

  A = P(1 +rt) . . . . . Principal P, rate r, time t (years)

  A = $1850(1 + 0.1225·(10/12)) = $2038.85

Ricardo will have paid back $2038.85 at the end of the loan period.

_____

<em>Additional comment</em>

We assume that the loan accrues simple interest and that the amount due is the sum of principal and interest at the end of the loan period.

The question is not specific as to whether interest compounds, or whether intermediate (monthly) payments are made. There are many possible ways the loan could be repaid, generally involving different amounts for the different terms.

7 0
2 years ago
Help show work please.
vichka [17]

Answer:

X = 7/3y - 10/3

Step-by-step explanation:

Add - 7y to both sides = -3x + 7y = 10 - 7y

= -3x = 10 - 7y

Divide both sides by -3

-3x/-3 = 10/-3 - 7y/-3

x = 7/3y - 10/3

5 0
2 years ago
What is the shape of the two-dimensional cross section?
geniusboy [140]
That would be A, I hope this helps my man! :) 
8 0
3 years ago
What is the area of a triangle whose vertices are G(−1, 2), H(5, 2) and K(8, −3)
bogdanovich [222]

the area is 15

steps:

a=1/2bh

a=1/2(5)(6)

a=1/2(30)

a=15

5 0
3 years ago
Find the y-intercept of the following equation. Simplify your answer.<br><br> y = 10x + 6
hram777 [196]

Answer:  6

Step-by-step explanation:

y = mx + b, where b is the y-intercept, in this case, y-intercept is 6.

3 0
2 years ago
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