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jekas [21]
3 years ago
15

There are 9 more children than parents in the room there are 25 people in the room in all how many children are there in the roo

m
what are the unknowns in this problem?
1.the total number of children and the total of parents in the room
2.the total number of children in the room
3.the total number of parents in the room
4.the total number of people in a room
Mathematics
1 answer:
Korolek [52]3 years ago
3 0
The unknowns should be 1 or 3. we don't know the total number of children and parents in the room, but we have a clue which 25, so if we were to subtract 9 from 25 we would get 16. i would recommend number 1
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which equation shows the point-slope form of the line that passes through (3, 2) and has a slope of 1/3 ?
denis23 [38]

Answer:

y-2=\frac{1}{3}(x-3)

Step-by-step explanation:

we know that

The equation of the line into point slope-form is equal to

y-y1=m(x-x1)

in this problem we have

m=\frac{1}{3}

(x1,y1)=(3,2)

substitute the values in the formula

y-2=\frac{1}{3}(x-3)

6 0
3 years ago
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Angie an Kenny play online video games. Angie buys 1 software package and 3 months of game play. Kenny buys 1 software package a
Sati [7]

Answer:

One month of gameplay costs $15

Step-by-step explanation:

Angie: 20 + 3x

Kenny: 20 + 2x

(20 + 3x) + (20 + 2x) = 115 --- add their costs together

(20 + 20) + (3x + 2x) = 115 --- collect like terms

40 + 5x = 115 --- simplify

5x = 75 --- subtract 40 from both sides

x = 15 --- divide both sides by 5

4 0
3 years ago
An English class attended a performance at the theater. The class took 25 students and 3 adults. Each student ticket, s, cost $3
castortr0y [4]
Total cost = student cost + adult cost
t = 25s + 3(s+3)
t=28s+9
8 0
4 years ago
If I am traveling 80 kilometers per hour how long will it take me to travel 20 kilometers per hour
ddd [48]
You are comparing velocities. Without a given acceleration, the time can not be found.
8 0
3 years ago
Select the two values of x that are roots of this equation.<br> 2x^2+ 1 = 5x
iren [92.7K]

Answer:

\frac{5+\sqrt{17}}{4},      \frac{5-\sqrt{17}}{4}

Step-by-step explanation:

One is asked to find the root of the following equation:

2x^2+1=5x

Manipulate the equation such that it conforms to the standard form of a quadratic equation. The standard quadratic equation in the general format is as follows:

ax^2+bx+c=0

Change the given equation using inverse operations,

2x^2+1=5x

2x^2-5x+1=0

The quadratic formula is a method that can be used to find the roots of a quadratic equation. Graphically speaking, the roots of a quadratic equation are where the graph of the quadratic equation intersects the x-axis. The quadratic formula uses the coefficients of the terms in the quadratic equation to find the values at which the graph of the equation intersects the x-axis. The quadratic formula, in the general format, is as follows:

\frac{-b(+-)\sqrt{b^2-4ac}}{2a}

Please note that the terms used in the general equation of the quadratic formula correspond to the coefficients of the terms in the general format of the quadratic equation. Substitute the coefficients of the terms in the given problem into the quadratic formula,

\frac{-b(+-)\sqrt{b^2-4ac}}{2a}

\frac{-(-5)(+-)\sqrt{(-5)^2-4(2)(1)}}{2(2)}

Simplify,

\frac{-(-5)(+-)\sqrt{(-5)^2-4(2)(1)}}{2(2)}

\frac{5(+-)\sqrt{25-8}}{4}

\frac{5(+-)\sqrt{17}}{4}

Rewrite,

\frac{5(+-)\sqrt{17}}{4}

\frac{5+\sqrt{17}}{4},      \frac{5-\sqrt{17}}{4}

8 0
3 years ago
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