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Naily [24]
3 years ago
13

Could someone please help me with these systems. I have to use substitution.

Mathematics
1 answer:
FromTheMoon [43]3 years ago
8 0
Isolate one term (x or y) in one of the equations

6x+6y=0
6x=-6y
X= -1y

Substitute x=-y into the other equation

-7(-y) + 2y =18

7y + 2y =18

9y=18

Y=2

Substitute y=2 into 6x+6y=0

6x + 6(2) = 0

6x + 12=0

6x= -12

X = -2
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Answer fast please and thank you
steposvetlana [31]

Answer:

Yes

Step-by-step explanation:

One input to one output is a linear one-to-one function.

7 0
2 years ago
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Help me here! cant seem to find the answer.. ;-;
Nesterboy [21]

Answer:

slope equals 3

7 0
2 years ago
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At a baseball game, a vender sold a combined total of 170 sodas and hot dogs. the number of hot dogs sold was 50 less than the n
Juliette [100K]

Let the number of sodas sold be x and the number of hotdogs sold be y. We can assemble a system of equations from the information given and solve.


x+y=170 (We know that soda + dogs is 170)

x-50=y (We know that dogs is equal to 50 less than sodas)


We can use substitution to solve this system of equations.

x+y=170

Sub in the value of y from the second equation

x+(x-50)=170

2x-50=170

2x=220

x=110


We now know the number of sodas sold was 110. Lets now plug this value into the equation to solve for y.

x+y=170

110+y=170

y=60


So, there were 60 hotdogs sold and 110 sodas sold.

8 0
3 years ago
A yard is equal in length to 3 feet the function takes a measurement in yards and returns a measurement and see what number will
Alik [6]

Answer:

It will return 31.5 ft

Step-by-step explanation:

Here, the function is as follows;

let the yard be represented as y and the f be the feet

It takes in yards and return feet

Mathematically, using the relation between the two;

So for every yards it takes in, it returns 3 times the value in feet

Thus, for 10.5 yards, what it will return will be;

10.5 * 3 = 31.5 ft

7 0
3 years ago
#6 : Dan borrowed $2,000 for 6 months at 12% annual simple interest rate. How much interest is that? [HINT: Time has to be in YE
Lana71 [14]

Answer:

That would be D.1440

Step-by-step explanation:

<h2>The formula for simple interest is I= P×r×t.</h2><h2>p=principal amount(2,000)</h2><h2>r=rate(12%)</h2><h2>t=time/month(6)</h2>
3 0
2 years ago
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