$\left \{ {{\frac{x}{2}-y=7 } \atop {-\frac{x}{7}+\frac{2y}{7}= -2 }} \right. \left \{ {{\frac{x}{2}.2-2y=2.7} \atop {-\frac{x}{7}.7+\frac{2y}{7}.7= -2.7}} \right. \left \{ {{x-2y=14} \atop {-x+2y=-14}} \right. \left \{ {{0x=0} \atop {y={\frac{x}{2}-7}} \right.$

ANSWER: B

ok done. Thank to me :>

8 0

3 years ago

Read 2 more answers

What is the product? (x-5)(2x+3x-1)

Firlakuza [10]

I assume the first term of the trinomial is 2x^2, and you left out the exponent.

Multiply each term of the binomial by each term of the trinomial.
Then collect like terms.

$(x - 5)(2x^2 + 3x - 1) =$

$= x * 2x^2 + x * 3x + x * (-1) - 5 * 2x^2 - 5 * 3x - 5 * (-1)$

$= 2x^3 + 3x^2 - x - 10x^2 - 15x + 5$

$= 2x^3 - 7x^2 - 16x + 5$

5 0

3 years ago

Read 2 more answers

Andrei wants to fill a glass tank with marbles, and then fill the remaining space with water. W(n) models the amount of water An

zavuch27 [327]

add the 32+0.05 to find the n

5 0

4 years ago

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A rental car agency charges $200.00 per week plus $0.25 per mile to rent a car. How many miles can you travel in one week for $3

Setler79 [48]

Equation: 0.25x + 200
0.25x + 200 = 345
0.25x = 145
140/0.25 = 580 miles
Answer: 580 miles

3 0

3 years ago