MATHEMATICS MIDDLE SCHOOL

Solve the system of equations: x – 4y = –8 and –3x + 12y = 24. A. (–4, 1)
B. (0, 2)
C. There are an infinite number of solutions.
D. There's no solution.

Answers

Answer 1
Answer:

Answer:

C. There are an infinite number of solutions.

Step-by-step explanation:

\left\{\begin{array}{ccc}x-4y=-8\n-3x+12y=24&\text{divide both sides by 3}\end{array}\right\n\underline{+\left\{\begin{array}{ccc}x-4y=-8\n-x+4y=8\end{array}\right}\qquad\text{add both sides of the equations}\n.\qquad\qquad0=0\qquad\bold{TRUE}
Answer 2
Answer: It should be C
Because when u multiply ( -3)*(x-4y= -8)

It’ll equal to -3x+12y=24 which is the same equation to the other one.
When the equations r the same, it means everything on the line is the solution for this system of equation.

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Please help me find the area

Answers

Answer:

5)56,350

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Step-by-step explanation:

If xy = 144, x + y = 30, and x > y, what is the value of x – y ?F. 4
G. 6
H. 18
J. 22
K. 24

Answers

xy=144\nx+y=30\to x=30-y\n\nsubstitute:\n\n(30-y)y=144\n-y^2+30y-144=0\n\n\Delta=30^2-4\cdot(-1)\cdot(-144)=900-576=324;\ \sqrt\Delta=√(324)=18\n\ny_1=(-30-18)/(2\cdot(-1))=(-48)/(-2)=24;\ y_2=(-30+18)/(2\cdot(-1))=(-12)/(-2)=6\n\nx_1=30-24=6;\ x_2=30-6=24\n\nx > y\ to x=24\ and\ y=6\n\nx-y=24-6=18\n\nAnswer:H.

What is the expanded form of 8.517

Answers

08+.500+.010+.007 is the answer to your problem

Order the fraction from least to greatest 1/4,1/6,1/5

Answers

Hey There Remone,

Order the fraction from least to greatest 1/4,1/6,1/5

(1)/(6) than (1)/(5) last (1)/(4)
1/6, 1/5, 1/4 because the more sections the smaller they are which means that is least

How do I solve 1-5+1x(4x4-31)x8

Answers

so you solve (4*4-31) first which is -15 and this equation now is 1-5+1*-15*8, and the answer is going to be -124
You solve what is in the paratense first

Target sells 24 bottles of water for $3, and 36 bottles of water for $4. Which is the better buy and by how much?

Answers

rate
cost/amount
3/24=1/8, 1 doller per 8 botttles

4/36=1/9, 1 dollar=9 bottles

9>8
9-8=1
if by 'better buy' you mean cheaper price then
24 or $3 is better by 1 bottle per bottle
You should NEVER buy plastic water bottles! only the reusable ones, but if you must know, it's cheaper to buy the 24 pack, because if you divide 24 by $3 you get 0.8 for the cost of each water bottle.
If you divide 36 by $4 you get 0.9 for the cost of eact water bottle.
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