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BabaBlast [244]
3 years ago
9

What is the solution of the following system?{3x + 3y = 10−9x − 9y = −30

Mathematics
1 answer:
lianna [129]3 years ago
5 0

Answer:

Infinitely many solutions.

Step-by-step explanation:

3x+3y=10

-9x-9y=-30

----------------

3(3x+3y)=3(10)

-9x-9y=-30

-------------------

9x+9y=30

-9x-9y=-30

-----------------

0=0

infinitely many solutions

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On Sunday, a local hamburger shop sold a combined of 572 hamburger and cheeseburger. The number of cheeseburgers sold was three
igor_vitrenko [27]
Answer: 143 hamburgers and 429 cheese burgers

Explanation:

Call h and c the number of both items.
(h-hamburger and c-cheeseburger)

h + c = 572
c = 3h

Sub the second into the first

h + 3h = 572
4h = 572

Divide both sides by 4
h = 143 hamburgers

Use this back into the second equation
c = 3 • 143 = 429 cheeseburgers

3 0
3 years ago
Multiply. Reduce if possible, if you can simplify, what is the GCF you used ? what is 3/7 x 2/4
lakkis [162]

Answer:

the not simplified answer is 6/28 The GCF is 2 the siplified answer is 3/14

Step-by-step explanation:

6 0
2 years ago
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The ratio of an object's weight on Earth to its weight on Neptune is 5 : 7. How much would a person who weighs 150 pounds on Ear
yuradex [85]
5/7 = 150/x
5x = 1050
x = 1050/5
x = 210 lbs <===
3 0
3 years ago
Read 2 more answers
What is the actual base length of the triangle in the scale drawing? 2.5 inch 2inch scale 1 inch=2m
Len [333]

Answer:

4 and 5

Step-by-step explanation:

Step-by-step explanation:

2x2=4

2x2+.5x2=5

3 0
2 years ago
Consider the quadratic equation below. Determine the correct set-up for solving the equation using the quadratic formula.
Studentka2010 [4]

Answer:

--3 ±sqrt((-3)^2 -4(4)(-9))

-------------------------------

2(4)

Step-by-step explanation:

4x^2-5=3x+4

We need to get this in standard form to answer the question

Subtract 3x from each side

4x^2-3x-5=3x-3x+4

4x^2-3x-5=+4

Subtract 4 from each side

4x^2-3x-9 =0

a = 4

b = -3

c = -9

-b ±sqrt(b^2 -4ac)

---------------------------

2a

--3 ±sqrt((-3)^2 -4(4)(-9))

-------------------------------

2(4)

5 0
3 years ago
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