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3 years ago

3x+2y=4 4x+5y=17 What is the value of x and y?

2 answers:

8 0

$3x+2y=4|\cdot(-4)\\
4x+5y=17|\cdot 3\\\\
-12x-8y=-16\\
\underline{12x+15y=51}\\
7y=35\\
y=5\\\\
3x+2\cdot5=4\\
3x+10=4\\
3x=-6\\
x=-2\\\\
\boxed{(x,y)=(-2,5)}$

Fudgin [204]3 years ago

5 0

{3x+2y=4 /*5
{4x+5y=17 /*(-2)

{15x+10y=20
{-8x-10y=-34 (+)
7x=-14
x=-2

15x+10y=20
15*(-2)+10y=20
-30+10y=20
10y=50
y=5

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Can someone plssss helpp me with this!!! and show the work!

hichkok12 [17]

Answer:

1/2

Step-by-step explanation:

8(1/2)^4

= 8 * 1 / 2^4

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3 years ago

HELP ASAP

Naily [24]

Answer:

$y+4 = -\frac{1}{3} (x-1)$

Step-by-step explanation:

1) First, find the slope of the line. Use the slope formula $m = \frac{y_2-y_1}{x_2-x_1}$ to find the slope. Substitute the x and y values of the given points into the formula and solve:

$m = \frac{(-5)-(-4)}{(4)-(1)} \\m = \frac{-5+4}{4-1} \\m = \frac{-1}{3}$

So, the slope is $-\frac{1}{3}$ .

2) Use the point-slope formula $y-y_1 = m (x-x_1)$ to write the equation of the line in point-slope form. Substitute values for $m$ , $x_1$ , and $y_1$ into the formula.

Since $m$ represents the slope, substitute $-\frac{1}{3}$ in its place. Since $x_1$ and $y_1$ represent the x and y values of one point on the line, choose any one of the given points (it doesn't matter which one) and substitute the x and y values of it into the formula. (I chose (1,-4), as seen below). This gives the equation of the line in point-slope form.

$y-(-4) = -\frac{1}{3} (x-(1))\\y+4 = -\frac{1}{3} (x-1)$

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2 years ago

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deff fn [24]

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nikdorinn [45]

I can't tell if that is a question but I will answer it anyway:

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3 years ago

Félix grew 8 flowers with 2 seed packets. With 5 seed packets, how many total flowers can Felix have in his garden? Solve using

Crazy boy [7]

Answer:

Step-by-step explanation:

8/2 equals 4 and 5 x 4 = 20.

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3 years ago