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mote1985 [20]
3 years ago
14

Is (-1,2) a solution of y=-2x-1

Mathematics
2 answers:
Klio2033 [76]3 years ago
7 0
A solution of a function is where the function hits the x-axis, so if y is any number that is not equal to 0, there is no possible way that point can be a solution. 

Hope this helps!
chubhunter [2.5K]3 years ago
4 0
The solution is: y=1.
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A rectangle is drawn so that the width is 4 feet shorter than the length. The area of the rectangle is 45 square feet. Find the
svetlana [45]

The length of the rectangle is 9 feet

Step-by-step explanation:

A rectangle is drawn so that:

  • The width is 4 feet shorter than the length
  • The area of the rectangle is 45 square feet

Assume that the length of the rectangle is x feet

∵ The length of the rectangle = x feet

∵ The width of the rectangle is 4 feet shorter than the length

∴ The width of the rectangle = (x - 4) feet

∵ The area of the rectangle = length × width

∴ The area of the rectangle = x(x - 4)

- Simplify it

∴ The area of the rectangle = x² - 4x

∵ The area of the square = 45 feet²

- Equate the two expressions of the area

∴ x² - 4x = 45

- Subtract 45 from both sides

∴ x² - 4x - 45 = 0

Use your calculator to find the value of x

∴ x = 9 and x = -5

- We will reject the value of x = -5 because there is no negative

  dimensions

∴ x = 9

∵ The length of the rectangle = x

∴ The length of the rectangle = 9 feet

The length of the rectangle is 9 feet

Learn more:

You can learn more about area of figures in brainly.com/question/4713715

#LearnwithBrainly

8 0
2 years ago
In the diagram below, and are tangent to O. What is the measure of E?
beks73 [17]

Answer:

A. 32 degrees

Step-by-step explanation:

Here we have to use the rule.

m∠E = 1/2 (major arc - minor arc)

m∠E = 1/2 (212 - 148)

m∠E = 1/2 (64)

m∠E = 32 degrees

Answer: A. 32 degrees

Thank you

7 0
2 years ago
If the circumference of a circle is x, then what is the area of the circle in terms of x?
grandymaker [24]

Answer:

x^2 / 4pi

Step-by-step explanation:

The area of a circle is (pi x r)^2

The circumference of a circle is 2pi x r

The find the radius, you need to divide x by 2pi, so x / 2pi

Then just plug it in as the radius:

(pi x (x / 2pi))^2 = x^2 / 4pi

7 0
3 years ago
Given 7x + 11y = N, what is the highest number N can be to produce an answer of No solution. (X,y) must be positive.
Svet_ta [14]
Since x and y must be positive, 7x and 11y are positive either. That means 7x + 11y > 0. Then we would obtain N > 0 because 7x + 11y = N. That also means N must be positive. So if we set N to be zero or negative, there would be no solution. Thus, to produce an answer of No solution, the highest number N could be is 0. 
3 0
3 years ago
Read 2 more answers
What is the power of ten in (8.91 x 10^2) (3.3 x 10^12)?
NNADVOKAT [17]
In this problem, the power of 10 is 14. Hope this helps!
6 0
3 years ago
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