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Nina [5.8K]
3 years ago
11

X2 + 9 = 93 grammarly made me write more so yeah idfk wht else to say.

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
3 0

Answer:

X = 42

Step-by-step explanation:

2x + 9 = 93

move the constant right

2x = 93 - 9

2x = 84 divide both sides

X = 42

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Answer:

15x

Step-by-step explanation:

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3 years ago
Consider the graph of the line y = x – 4 and the point (−4, 2).
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Answer:

a. The slope  of a line parallel to the given line is 1

b. A point on the line parallel to the given line, passing through (−4, 2), is  (1,7)

c. The slope of the line perpendicular to the given line is -1

d. A point on the line perpendicular to the given line, passing through (−4, 2), is (3,-5)

Step-by-step explanation:

The equation of the line in Slope-intercept form  is:

y=mx+b

Where m is the slope and b is the y-intercept.

a. For the line y = x - 4

You can identify that:

m=1

 By definition, two lines are parallel if they have the same slope. Then, the  slope of a line parallel to the given line is:

m=1

b. The equation of the line in Point-slope form is:

y -y_1 = m(x - x_1)

Where m is the slope and (x_1,y_1)  is a point of the line.

Given the point (-4,2), substitute this point and the slope of the line into the equation:

 y -2 = (x +4)

Give a value to "x", substitute it into this equation and solve for "y":

For x=1 :

y -2 = (1 +4)

y= 5+2

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c. The slopes of perpendicular lines are negative reciprocals, then the  slope of a line perpendicular to the given line is:

m=-\frac{1}{1}\\\\m=-1

d. Given the point (-4,2), substitute this point and the slope of the line into the equation:

 y -2 = -1(x +4)

 y -2 = -(x +4)

Give a value to "x", substitute it into this equation and solve for "y":

For x=3 :

y -2 = -(3 +4)

y= -7+2

y= -5

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8 0
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OLEGan [10]
Omari (3 1/2)___________(0)school____________(3 1/4)daisy

3 1/2 + 3 1/4 = 6 + (1/2 + 1/4) = 6 + (2/4 + 1/4) = 6 3/4 blocks apart <==


5 0
3 years ago
A book claims that more hockey players are born in January through March than in October through December. The following data sh
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Complete question :

Birth Month Frequency

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April-June 56

July-September 30

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Observed value, O

Mean value, E

The test statistic :

χ² = (O - E)² / E

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Using the Pvalue from Chisquare calculator :

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Since the obtained Pvalue is so small ;

P < α ; We reject H0 and conclude that there is significant evidence to suggest that hockey​ players' birthdates are not uniformly distributed throughout the​ year.

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The answer is 180 because 6 x 3=18 and 18x10=180
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