MATHEMATICS HIGH SCHOOL

Is y = IxI a function? Explain.

Answers

Answer 1
Answer:

Answer:

It is a function because there is one y value for any x value, and it passes the VERTICAL line test. Horizontal line test is for checking if it is one-to-one, which will tell you if the inverse is a function or not.

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Which inequality represents this sentence?Seven times six is less than or equal to nine times five. 7 • 6 ≥ 9 • 5 7 • 6 < 9 • 5 7 • 6 > 9 • 5 7 • 6 ≤ 9 • 5
Help I keep failing! Thx in advance! Will give brainliest
An inlet pipe on a swimming pool can be used to fill the pool in 40 hours. The drain pipe can be used to empty the pool in 45 hours. If the pool is 14 filled and then the inlet pipe and drain pipe are opened, how many more hours would it take to fill the pool? Round your answer to two decimal places, if needed.

a fraction is such that the numerator is 2 less than the denominator if you add 3 to the numerator and 5 to the denominator the resulting fraction is 3/5 find the fraction​

Answers

Answer:  3/5

Step-by-Step Explanation:

Let x represent the denominator of the fraction, then we have (x-2)/(x)

Now add 3 to the numerator and 5 to the denominator and set it equal to 3/5:

((x-2)+3)/((x)+5)=(3)/(5)\n\n\n\text{Simplify:}\n(x+1)/(x+5)=(3)/(5)\n\n\n\text{Cross Multiply and solve for x:}\n5(x+1)=3(x+5)\n5x+5=3x+15\n2x=10\nx=5

Substitute x = 5 into the original fraction:

((5)-2)/((5))\quad =\large\boxed{(3)/(5)}

Answer:

The required fraction is 3/5

The figure below shows a line graph and two shaded triangles that are similar:Which statement about the slope of the line is true?
It is –2 throughout the line.
It is fraction negative 1 over 2 throughout the line.
The slope from point O to point A is one-half times the slope of the line from point A to point B. The slope from point O to point A is two times the slope of the line from point A to point B.

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Answer:

The slope is fraction negative 1 over 2 throughout the line.

Step-by-step explanation:

The slope (m) of a line is computed as follows

m = (y2 - y1)/(x2 -x1)

where (x1, y1) and (x2, y2) are the coordinates of 2 points of the line. Taking, for example, points (0, 0) and (-4, 2), the slope is:

m = (2 - 0)/(-4 -0)  = -1/2

Then, the slope is -1/2 throughout the line.
Every time the y-value decreases by 1, the x-value increases by 2, so the slope is -1/2 throughout the line.

Which measure is not the area of a circle with radius 20 mm?

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Given:
radius = 20 mm

Area of a circle = π r²
A = 3.14 * (20mm)²
A = 3.14 * 400mm²
A = 1,256 mm²

400mm² ; 628.57mm² ; and mm² ARE NOT THE AREA OF A CIRCLE

Answer:

thx for the answer

Step-by-step explanation:

If 20% of a number is 8, what is 25% of the number?

Answers

20%*x = 8

20% = 2/10

2/10*x = 8      |(*10/2)

2/10*10/2*x= 8 * 10/2                    2/10*10/2 =>1
1*x = 80/2
x=40

25% from 40 is 10
25% = 1/4
1/4 * 40 = 40/4 = 10

Answer:

Set up an equation as 0.2x = 8, which means 20 percent of x equals 8. Solve the equation by dividing each side by 0.2. Dividing 0.2 from each side results in x = 40. Eight is 20 percent of 40.

Step-by-step explanation:

Help help help help help help help help

Answers

Answer:

x^(2) +5x

Step-by-step explanation:

A = length x width

l = x + 5

w = x

A = x(x + 5)

A=x^(2) +5x

Garcia company is a perfectly competitive firm. the market price of its output is $10. the firm is currently producing 100 units of output. at this level of output, the firm’s average total cost is $8 per unit, its average variable cost is $6 per unit, and its marginal cost is $10 per unit. what is the firm’s profit?

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Answer: $200.
Any firm (regardless of market structure) will maximize profit by producing and selling the quantity at which marginal revenue is equal to marginal cost.In the special case of a perfectly competitive firm,marginal revenue is equal to price.
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