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AlexFokin [52]
3 years ago
11

| 2x + 2y = 10 y = 5+x

Mathematics
1 answer:
melisa1 [442]3 years ago
6 0
2x + 2(5+x)=10
2x+10+2x=10
4x+10=10
4x=0
X=0
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when a number is added to 1/5 of itself, the result is 24. the equation that models this problem is n 1/5 n = 24. what is the va
GuDViN [60]

Let n be unknown number, then 1/5 of this number is 1/5n. When you add these two numbers, you get

n+\dfrac{1}{5} n.

You know that this sum is equal to 24, so

n+\dfrac{1}{5} n=24.

1. Multiply this equation by 5:

5n+n=120.

2. Solve it:

6n=120,\\n=120:6,\\n=20.

Answer: n=20, correct choice is B.

4 0
3 years ago
Read 2 more answers
Victor bought a computer for $1,800. He made a down payment of $200 and will pay the rest in 5 equal payments. If p represents t
Mrrafil [7]

Answer:

C

Step-by-step explanation:

4 0
3 years ago
Which table describes the behavior of the graph of f(x) = 2x3 – 26x – 24?
In-s [12.5K]

Answer:

For x∈ {-∞,-3} y<0, below x-axis

x∈ {-3,-1} y>0, above x-axis

x∈ {-1,4} y<0, below x-axis

x∈ {4,∞} y>0, above x-axis

Step-by-step explanation:

f(x)=2x^{3}-26x-24

2x^{3}-26x-24=0

2x^{3}-26x-24=0\\2x^{3}-2x-24x-24=0\\2x(x^{2} -1)-24(x+1)=0\\2x(x+1)(x-1)-24(x+1)=0\\(x+1)(2x^{2} -2x-24)=0\\=> x+1=0 => x_{1}=-1\\

=> 2x^{2} -2x-24=0\\=>2(x^{2} -x-12)=0\\=> x^{2} -x-12=0\\=> x^{2} -4x+3x-12=0\\=> x(x-4)+3(x-4)=0\\=> (x-4)(x+3)=0\\

=> x-4=0\\=> x_{2}=4\\=> x+3=0\\=>x_{3}=-3\\

For x∈ {-∞,-3} y<0, below x-axis

x∈ {-3,-1} y>0, above x-axis

x∈ {-1,4} y<0, below x-axis

x∈ {4,∞} y>0, above x-axis



7 0
3 years ago
Read 2 more answers
How is algebra done?​
Helga [31]
Can you be more specific
3 0
3 years ago
What does x equal?.....​
frosja888 [35]

Answer:

38

Step-by-step explanation:

AB is parallel to CD. So, <ABC = <BCD.

Now, <BCD = <ABC = 180 - 111 - 31 = 38

5 0
3 years ago
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