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2 years ago

The original price of a book is x dollars. The book is sold for 10% discount. After that, the increased by 25%

Mathematics

1 answer:

miv72 [106K]2 years ago

4 0

Answer:

assume X dollar is $100

If so then,

$100-10% =$90

Thus,

$90x125%=$112.5

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Ela

77julia77 [94]

Answer: 3 × 10⁴ miles²

Step-by-step explanation:

Given that:

Estimated Surface area of Lake = 30,000 square miles

Expressing the estimated area as a whole number multiplied by a power of ten

Hence, we are required to express the surface area in standard form:

30,000 miles ² in standard format:

30,000 is equivalent to (3 × 10,000)

3 is a whole number

10,000 = (10 * 10 * 10 * 10)= 4 th power of 10

10,000 = (10 * 10 * 10 * 10) = 10⁴

Hence,

3 × (10 * 10 * 10 * 10) = 3 × 10⁴ miles²

4 0

3 years ago

If you change the sign of a point's x-coordinate, how does the location of the point change? CLEAR CHECK The point moves down an

Fudgin [204]

Answer:

The point crosses over the y-axis

Step-by-step explanation:

Given

A change in the sign of x coordinate

Required

The effect on the point location

Assume the coordinate to be (x,y).

The above point is located in the first quadrant,

When the x value changes to negative i.e. (-x,y)

The point moves from the first quadrant to the second quadrant

This implies that, the point crosses over the y-axis.

Similarly, assume the coordinate to be (-x,-y).

The above point is located in the third quadrant,

When the x value changes i.e. (x,-y)

The point moves from the first quadrant to the fourth quadrant

This implies that, the point crosses over the y-axis.

4 0

3 years ago

What is the slope of a ski run that rises 5 feet for every horizontal change of 20 feet? Pls show work

Over [174]

Slope is the rise/run.
5/20 is the slope but simplify it so it’s now 1/4

7 0

2 years ago

Read 2 more answers

Determine between which consecutive integers the real zeros of y(x) = x2 - 4x – 2 are located.

Sholpan [36]

Answer:

The zeros are x1=4.45 and x2=-0.45.

x1 is between 4 and 5.

x2 is between -1 and 0.

Step-by-step explanation:

We have the function:

$y(x) = x2 - 4x-2$

As this is a quadratic function, we can calculate the zeros of the function with the quadratic equation:

$x_{1,2}=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-(-4)\pm\sqrt{(-4)^2-4\cdot 1\cdot(-2)}}{2\cdot 1}\\\\\\x=\dfrac{4\pm\sqrt{16+8}}{2}\\\\\\x=\dfrac{4\pm\sqrt{24}}{2}\\\\\\x=\dfrac{4\pm4.9}{2}=2\pm2.45\\\\\\x_1=2+2.45=4.45\\\\x_2=2-2.45=-0.45$

The zeros are x1=4.45 and x2=-0.45.

x1 is between 4 and 5.

x2 is between -1 and 0.

7 0

3 years ago

Read 2 more answers

The two angles shown in the figure are supplementary. What is the value of x? 6(x+1) other angle is 48°

wel

6(x+1)+48°=180°
6x+6+48=180
6x+54=180
6x=126
x=21°. Hope it help!

5 0

3 years ago