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aniked [119]
4 years ago
6

I need help fast please...

Mathematics
1 answer:
BARSIC [14]4 years ago
5 0

Answer:

87: y = 5

88: y = 0

89: y = -2

90: y = -1/2x + 9

91: y = 2x - 16

92: y = x - 11


Step-by-step explanation:

To find the slope(m): (y1 - y2)/(x1 - x2)

To find the y-intercept:

y = mx + b

Replace m with the slope and x and y with one of the sets of coordinates. Then simplify to get the y-intercept. Use the equation y = mx + b and replace m with the slope and b with the y-intercept to get the equation.


(Sorry if this is a little confusing.)

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Given the point (3,4 ) and the slope of 6 ,find y when x=27.
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6 0
4 years ago
What choices are solutions for equation x^2-3x = -5/4
Kryger [21]

Here's the solution,

=》

{x}^{2}  - 3x =  -  \dfrac{5}{4}

=》

{x}^{2}  - 3x +  \dfrac{5}{4}  = 0

now, let's multiply the whole equation with 4

=》

4 {x}^{2}  - 12x + 5 = 0

=》

4 {x}^{2}  - 10x - 2x + 5= 0

=》

2x(2x - 5) - 1(2x - 5) = 0

=》

(2x - 1)(2x - 5) = 0

so,

Case 1. where, 2x - 5 = 0

=》

x =  \dfrac{5}{2}

case 2. where, 2x - 1 = 0

=》

x =  \dfrac{1}{2}

8 0
3 years ago
In parallelogram DEFG, DH = x + 5, HF = 2y, GH = 3x – 1, and HE = 5y + 4. Find the values of x and y.
earnstyle [38]
The diagonals of a parallelogram bisect each other.

DH = HF and GH = HE

x + 5 = 2y
3x - 1 = 5y + 4

Solve the first equation for x.
x = 2y - 5

Now substitute 2y - 5 for x in the second equation.

3(2y - 5) - 1 = 5y + 4

6y - 15 - 1 = 5y + 4

6y - 16 = 5y + 4

y = 20

Now substitute 20 for y in the first original equation.

x + 5 = 2y

x + 5 = 2(20)

x + 5 = 40

x = 35

Answer: x = 35 and y = 20
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