MATHEMATICS MIDDLE SCHOOL

Solve 3x+2y=5 and x+y=3 as a graph, substitution, or elimination?

Answers

Answer 1

Answer:

Step-by-step explanation:

multiply second equation by -2

-2 × (x+y) = 3➡ -2x - 2y = -6 now add up both equations

3x + 2y - 2x-2y = 5-6 ➡x = -1 (-2y eliminated +2y)

now use the value we found for x in the second equation to find the value of y

x + y = 3 we found x as -1

-1 +y = 3 ➡y = 4

Related Questions

A train leaves New Orleans at 2:00 PM. A second train leaves the same city in the same direction at 4:00 PM. The second train travels 48mph faster than the first. If the second train overtakes the first at 6:00 PM, what is the speed of each of the two trains?
Please help with these math questions
Is 4.1 g less than or greater than 410 mg
A salesperson set a goal to earn $3,000 in July. He receives a base salary of $1,200 per month as well as a 10% commission for all sales in that month. How many dollars of merchandise will he have to sell to meet his goal?
To solve the equation 2−5(3+4x)=2x+7,2-5(3+4x)=2x+7, Miranda's first step was to write 2−15−20x=2x+72-15-20x=2x+7. Which property did Miranda use in her first step?

The time in seconds between seeing lightning and hearing thunder is about five times the storm's distance in miles. Write a function to represent the storm's distance f(s) given the time s. How far away is a storm if this time is 15 seconds?

Answers

f(s)=5s
f(s)=5(15)
f(s)=75
At 15 seconds, the storm would be approximately 75 miles away.

Identify the pair of anglesQuestion 2 options:

A. Same side interior

B. Alternate exterior

C. Alternate Interior

D. Corresponding

Answers

Answer:

i think its C it should be c

A stick is x meter long. A string is 4 times as long as the stick. Express the length of the stick in terms of x.

Answers

To represent the length of the string, we can use the variable y.

$y=4x$

Y is four times longer than X.

Hope this helps!

a box of marbles can be shared equally among 6,7,or 8 students with 4 marbles left over each time.what is the least possible number of marbles In the box?

Answers

If there are 4 marbles left over each time, then we can forget about them for now.

So the question is, what is the smallest number than can be divided into 6,7 and 8?

the numbers have only one non-1 divisor in common: both 6 and 8 are divisible by 3.

so for our purposes we can "delete" one 2 and ask:

what is the smallest number than can be divided into 3,7 and 8 ?

There are no more divisors in common, so we just have to multiply them: 3*7*8=21*8=168

and the 4 marbles "extra"? We add them to this sum.

the the smallest possible number in the box is 168+4=172.

What value does the 9 in 93 represent

Answers

The 9 represents 90.....................

7.1-x=4.9? Need help

Answers

Answer:

Take 7.1-4.9=x

Step-by-step explanation:

Let's solve your equation step-by-step.
7.1
−
x
=
4.9
Step 1: Simplify both sides of the equation.
7.1
−
x
=
4.9
7.1
+
−
x
=
4.9
−
x
+
7.1
=
4.9
Step 2: Subtract 7.1 from both sides.
−
x
+
7.1
−
7.1
=
4.9
−
7.1
−
x
=
−
2.2
Step 3: Divide both sides by -1.
−
x
−
1
=
−
2.2
−
1
x
=
2.2

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