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3 years ago

Solve this problem : 2x- 3 (y-2x) + (-5) (-2y)

2 answers:

7 0

2x - 3(y - 2x) + (-5)(-2y)

Simplify everything.

2x - 3y + 6x + 10y

Add like terms.

(2x + 6x) + 10y

8x + 10y

~Hope I helped!~

liq [111]3 years ago

4 0

2x - 3(y - 2x) + (-5)(-2y)

you multiply -3(y - 2x) first and then (-5)(-2y)

2x - 3y + 6x + 10y

Combine like terms

2x + 6x - 3y + 10y
8x + 7y

8x + 7y is your answer

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3 years ago

Solve x

d1i1m1o1n [39]

Step-by-step explanation:

$x^{2} - 4x - 7 = 0$

First, let's move the $7$ to the right-hand side so we can determine what constant we'll need on the left-hand side to complete the square:

$x^{2} - 4x = 7$

From here, since the coefficient of the $x$ term is $-4$ , we know the square will be $(x - 2)$ (since $-2$ it's half of $-4$ ).

To complete this square, we will need to add $(-2)^{2}$ to both sides of the equation:

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$x^{2} - 4x + 4 = 7 + 4$

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Now we can take the square root of both sides to figure out the solutions to $x$ :

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3 years ago

A ladder leaning against a wall forms a triangle and exterior angles with the wall and the ground. What are the measures of the

Paha777 [63]

11x° is interior angle of ladder to the ground
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3 years ago

What multiplies to give you 15 and adds to give you -8?

Nitella [24]

Answer:

The system of equations is:

x + y = 15

xy = 15

Step-by-step explanation:

solve the first for y and substitute in the second:

y = 15-x

x(15-x) = 15