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3 years ago

How do I work out the problem 9y= -6x+42

Mathematics

2 answers:

erik [133]3 years ago

5 0

Divide everything by 9 to get y by itself.

Umnica [9.8K]3 years ago

4 0

So, it looks like it is in slope-intercept form! Yet you need to get "Y" by itself in order it to be y=mx+b (slope-intercept form)

Step 1:

9y=-6x+42
--- --------- INVERSE OPERATIONS: Divide by 9!
9 9

y=-6/9x+ 42/9

Step 2: Take your new equation and SIMPLIFY/reduce its fractions.

(all these numbers are multiple of 3, so they can be divided by 3 to turn them into it's most simplest form)

y=-2/3x+ 14/3

Step 3: Identify your final answer.

y=-2/3x +14/3

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A store charges 32% extra for credit items. if the cash price is $1100, what is the credit price?

Savatey [412]

Answer:

$1452

Step-by-step explanation:

$CP=1100*1.32=$1452$

6 0

2 years ago

A cafe only sells two types of sandwiches, turkey and steak. The cafe charges $4 for turkey sandwiches and $6 for steak sandwich

valkas [14]

Answer:

513 turkey sandwiches were sold.

Step-by-step explanation:

Let's use $x$ to represent turkey sandwiches and $y$ to represent steak sandwiches.

$x$ = turkey sandwiches

$y$ = steak sandwiches

$x + y = 925$ total sandwiches that were sold

$4x + 6y = 4524$ dollars that were made

$x + y = 925\\y = 925 - x$

Now that we know what $y$ (steak sandwiches) equals, we plug it in to an equation to find $x$ .

$4x + 6(925-x) = 4524\\4x + 5550 -6x=4524\\$

Now, we subtract 5,550 from BOTH sides so we can get x by itself.

$-2x + 5550 - 5550 = 4524 - 5550\\-2x = -1026$

Next, we divide both sides by 2, so x is bare.

$\frac{2x}{2} = \frac{1026}{2}$

$x = 513$

Since x represents turkey sandwiches, we have our answer: 513 turkey sandwiches were sold.

I hope this helps! :)

3 0

2 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> What is [100(−4)^n-1} equal to?

nikklg [1K]

Answer: -5100

<u>Step-by-step explanation:</u>

$\sum^4_1[100(-4)^{n-1}]\qquad \rightarrow \qquad a_1=100\ \text{and r = -4}\\\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\\\S_4=\dfrac{100(1-(-4)^4)}{1-(-4)}\\\\\\.\quad=\dfrac{100(1-256)}{1+4}\\\\\\.\quad=\dfrac{100(-255)}{5}\\\\.\quad=20(-255)\\\\.\quad=-5100\\$

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2 years ago

Questions 1-6 , need help ASAP , will award you brainiest

nika2105 [10]

Answer:

1. 13+10i

2. 28-(-4i)

3. -14-1i

4. 4 -i

5. 15+ 10i

6.8 - 5i^2

Step-by-step explanation:

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2 years ago

Correct I’ll give brainlist no links or I’ll report

Margarita [4]

Answer:

-2

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers