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Dmitriy789 [7]
3 years ago
7

(Pls help)sally states that the equation g(x)= x^3 + 10^2 - 3x represents a quadratic function. Explain why she is incorrect.​

Mathematics
1 answer:
pentagon [3]3 years ago
8 0
SOLVE THE EQUATIONS

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Find the point of intersection (if any) of the following pairs of lines: a) x – 2y +1=0 2x + 3y – 7 = 0 b) x-2y+11=0 -x+2y-13 =
pychu [463]

Answer:

a) (11/7, 9/7)

b) There's no point of intersection

Step-by-step explanation:

a) x - 2y + 1 = 0

2x + 3y - 7 = 0

To find the point of intersection, we need to solve the system of equations  and the result will be the point of intersection (x,y)

x-2y+1=0\\x= 2y-1

Now we substitute x in the second equation:

2x+3y-7=0\\2(2y-1)+3y-7=0\\4y-2+3y-7=0\\7y-9=0\\y=9/7

Now we substitute y in our first equation.

x-2y+1=0\\x-2(9/7)+1=0\\x-18/7+1=0\\x=18/7-1\\x=11/7.

The point of intersection is (11/7, 9/7)

b) x -2y +11 =0

-x + 2y - 13 =0

We are going to follow the same procedure:

x-2y+11=0\\x=2y-11

-(2y-11)+2y-13=0\\-2y+11+2y-13=0\\0y=2\\0=2

Since this system of equations doesn't have a solution, the system has no point of intersection.

5 0
3 years ago
Solve for x and thank you
Romashka [77]

9514 404 393

Answer:

  x = 57.6

Step-by-step explanation:

The length of the segment on the right is 30/25 = 1.2 times the length of the segment on the left.

  x = 1.2 × 48 = 57.6

_____

<em>Additional comment</em>

Parallel lines cut transversals proportionally. That is why 30/25 = x/48.

3 0
2 years ago
Suppose the same quantity is measured but with a more precise method giving an average and standard deviation of 15.0 ± 2.5. how
abruzzese [7]

To solve this, we use the z test.

The formula:

z = (x – u) / s

where x is sample value = 20, u is the mean = 15, and s is the standard deviation = 2.5

z = (20 – 15) / 2.5

z = 2

Since we are looking for values greater than 20, this is right tailed test. We use the standard distribution tables to find for P.

P = 0.0228

 

Therefore:

number of students = 100 * 0.0228 = 2.28

 

<span>2 to 3 students will get greater than 20 measurement</span>

7 0
3 years ago
Give the equation of the line with a slope of -7/2<br> and a y-intercept of - 6
antoniya [11.8K]

Answer:

y =  \frac{ - 7}{2}  - 6

3 0
3 years ago
HELP IM ON A TIME LIMIT AND IDK THE ANSWER
aleksandrvk [35]

Answer:

Check step-by-step explanation

Step-by-step explanation:

A = \frac{1}{2} d_{1}  d_{2}

to solve for d_{1}:

d_{1} = \frac{2A}{d_{2}}

to solve for d_{2}:

d_{2} = \frac{2A}{d_{1}}

4 0
3 years ago
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