3 years ago

Como le hago si tengo un problema de mate..

Mathematics

1 answer:

monitta3 years ago

5 0

¿Sólo entiendes español o puedo responder en inglés?

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5x + 2y=7 - 2x + 6y=9

ollegr [7]

Answer:

x = $\frac{12}{17}$ or 0.706

$y = \frac{59}{34}$ or 1.735

Step-by-step explanation:

5x + 2y=7 ----->(eq 1)

- 2x + 6y=9 ----->(eq 2)

Multiply (eq 1) with 3

3×(5x + 2y) = 3×7

15x + 6y = 21 ----->(eq 3)

substract (eq 3) from (eq 2)

- 2x + 6y - (15x + 6y) = 9-21

- 2x + 6y - 15x - 6y = 9-21

- 2x - 15x + 6y - 6y = 9-21

-17x = -12

x = -12 ÷ -17

x = $\frac{12}{17}$

put x = $\frac{12}{17}$ in (eq 1)

$5*\frac{12}{17} + 2y = 7$

$2y = 7- 5*\frac{12}{17}$

$2y = \frac{7*17 - 60}{17}$

$2y = \frac{119- 60}{17}$

$2y = \frac{59}{17}$

$y = \frac{59}{17*2}$

$y = \frac{59}{34}$

6 0

4 years ago

Tennis socks have been discounted and are only $4.79 this week. They usually cost $7.99. What percentage is the discount?

Ludmilka [50]

Answer:

Step-by-step explanation:

7.99-4.79= 3.3

3.2/7.99=40

6 0

4 years ago

3(2 + 4) = (3•2)+(3•4) is an example of which property?

melomori [17]

Answer:

Distributive Property

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

5.13570 <img src="https://tex.z-dn.net/?f=5.1%20%5Cdiv%2035.7" id="TexFormula1" title="5.1 \div 35.7" alt="5.1 \div 35.7" ali

anzhelika [568]

0.1428 is your answer

7 0

4 years ago

A) Find the length of each radius (radius of circle M and radius of circle N).

lilavasa [31]

A) From the graph,
.. radius of M is 1
.. radius of N is 3

B) The "point of tangency" is the one point where the circles and tangent line meet. That point is (2, 1).

C) The horizontal tangent line has equation
.. y = 1

6 0

3 years ago