All categories

3 years ago

© y= 2x + 6 -3x - 5y= 22 Please help with substitution

Mathematics

2 answers:

umka21 [38]3 years ago

7 0

Answer:

[2] x = -5y - 4

// Plug this in for variable x in equation [1]

[1] 2•(-5y-4) - 5y = 22

[1] - 15y = 30

// Solve equation [1] for the variable y

[1] 15y = - 30

[1] y = - 2

// By now we know this much :

x = -5y-4

y = -2

// Use the y value to solve for x

x = -5(-2)-4 = 6

Solution :

{x,y} = {6,-2}

Processing ends successfully

Subscribe to our mailing list

Email Address

Terms and Topics

Linear Equations with Two Unknowns

Solving Linear Equations by Substitution

You might be interested in

Please help

liq [111]

Answer:

It's a vertical stretch.

Step-by-step explanation:

6 0

3 years ago

Which of the following equations represents a graph with the least rapid rate of change? A. Y= 3 (3^x) B. Y= 5 (2^x) C. Y= 2 (5^

Marianna [84]

The answer is C. Y=2(5^x)

5 0

3 years ago

Xy=7, x=0, y=7 and y=9 revolves around the x axis

Vanyuwa [196]

With shells, the volume is given by

$2\pi\displaystyle\int_7^9\frac7y\times y=14\pi\int_7^9\mathrm dy=28\pi$

8 0

3 years ago

The sides of a rectangle in the coordinate plane are parallel to the axes two of the vertices of the rectangle are (3,-2) and (-

Llana [10]

Answer:

C(-4,-2), D(3,-7)

$Ar=35unit^{2}$

Step-by-step explanation:

we procced to identify points:

A(-4,-7), B(3,-2)

for being the sides of a rectangle parallel to the axes, we find the other two vertices (VIEW GRAPH)

C(-4,-2), D(3,-7); Area of the rectangle Ar=b*h, where

$b=(X_{D}-X_{A}); h=(Y_{B}-Y_{D})$

So Ar=(3-(-4))*(-2-(-7)) = (3+4)*(-2+7)=7*5= $35unit^{2}$

7 0

3 years ago

What fractional part of a pound is an ounce

Andre45 [30]

<span>That depends on what you mean by "pound" and "ounce."

There are 16 English ounces in an English pound. There are 12 troy ounces in a troy pound.</span>

6 0

3 years ago