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o-na [289]
3 years ago
15

Solve the equation algebraically. x^2-7x-1/7=0

Mathematics
1 answer:
valentina_108 [34]3 years ago
7 0

Answer:

x1=\frac{49+\sqrt{2429}}{14} \\x2=\frac{49-\sqrt{2429}}{14} \\

Step-by-step explanation:

x^2-7x-\frac{1}{7} =0\\7x^2-49x-1=0\\D=b^2-4ac=(-49)^2-4*7*(-1)=2429\\x1=\frac{49+\sqrt{2429} }{14} \\x2=\frac{49-\sqrt{2429} }{14} \\

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4. Describe how you can tell by looking at the graph of a function
pashok25 [27]

Answer: The variable in the vertical axis (or y-axis) is the output

The variable in the horizontal axis (or x-axis) is the input.

Step-by-step explanation:

Usually, a graph of a function y = f(x) is represented in an X-Y coordinate axis.

An X-Y coordinate axis is conformed by two perpendicular lines, one vertical (y-axis) and one horizontal (x-axis)

The vertical axis (or the y-axis) is the output, and the horizontal axis (or the x-axis) is the input.

This method will work almost always, as is standardized that the x-axis corresponds to the input, and the y-axis corresponds to the output.

3 0
3 years ago
How many whole numbers are there<br>between 181 and 200​
emmainna [20.7K]

Answer:

19

Step-by-step explanation:

200−181 = 19

There are 19 whole numbers between 181 and 200.

3 0
3 years ago
Sarah is going to a higher a DJ for her party. DJ iceman charges an initial fee of $100 in addition to $21 per hour. DJ chomp ch
nalin [4]
First you make an equation and establish a variable.
x=amount of hours the DJs will charge the same amount
100+21x=150+15x
Now you solve for x and that will get you your answer.
100+21x=150+15x
-21x -21x
100=150-6x
-150 -150
-50=-6x
8.3333...=x
You can round the answer to $8.33
Hope I helped.
6 0
3 years ago
Which of the following statements must be true, given that AABC= AXYZ,
sattari [20]

Answer:

B. m ∠Z = 32°

Given:

Δ ABC ≅ Δ XYZ

m ∠ C = 32°

When 2 triangles are congruent we can say that all side of 1 triangle are equal to corresponding sides of other triangle.

Side AB= Side XY And Side BC = Side YZ and side AC = side XZ

Also,

When 2 triangles are congruent we can say measure of all angles of 1 triangle are equal to measures corresponding angles of other triangle.

m ∠A = m ∠X and m ∠B = m∠Y and m ∠C = m ∠Z

m ∠ C = 32° hence m ∠ Z = 32

3 0
3 years ago
The circumference of a circle is 32 cm which is closest to the radius
Feliz [49]

Answer:

The answer is 5.1 cm

Step-by-step explanation:

7 0
3 years ago
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