All categories

3 years ago

How do I write the equation 9x-6y=-72 in slope-intercept form?

1 answer:

6 0

Y=mx+b 72+9x=6y 12+9x/6=y 12 I is the y intercept and 9/6 is the slope. 9 being the rise or y value and 6 being the run or x value.

You might be interested in

What is the answer to this

weeeeeb [17]

If all the cheese slices have same mass, say m grams

and mass of 3 cheese slices is 27

so,

m+m+m=27

3m=27

or m=27/3

m=9

thus

mass of one cheese slice is 9 grams

3 0

3 years ago

Read 2 more answers

Keiko sold 3 less than three-fourths of his sister’s sales. Which expression represents what Keiko sold?

Valentin [98]

Let’s represent his sister’s sales as x

3/4ths of his sister’s sales would be:

3/4x

3 less than 3/4ths of his sister’s sales would be:

3/4x - 3

3 0

3 years ago

At a school picnic, your teacher asks you to mark a field every 10 yards so students can play football. The teacher accidentally

Oxana [17]

Approximately 9 meters are in 10 yards, (as there is approximately 1 meter in a yard, .9144 to be exact.)

3 0

3 years ago

Use a matrix to solve the system:

Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

$2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\$

Rewrite these equations in matrix form

$\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\$

we can write it like this,

$AX=B\\X=A^{-1}B$

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

$A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right] \\$

now multiply the matrix with B

$X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\$

4 0

3 years ago

Manuel has 18 yards of fabric to make table runners. It takes yard to make each runner. The expression that models the situation

nirvana33 [79]

He can make 18 table runners.

6 0

3 years ago

Read 2 more answers