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Grace [21]
3 years ago
11

Explain the difference between an equation and an inequality. Write at least two of each, one of the form px+q and one of the fo

rm p(x+q), and explain the steps you take to solve.
Mathematics
1 answer:
aleksandrvk [35]3 years ago
6 0
An equation shows the equal value of two expressions while an inequality shows that an expression is either less than or more than the other; an equation shows equality, inequality shows inequal
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Julia’s service at a beauty salon was $72.60, before tax. The sales tax rate was 8%. If she added 20% of amount before tax as a
Nutka1998 [239]
Your tax is $5.81
Your tip is $14.52
Your total is $92.93
6 0
3 years ago
Divide using long division. Checky<br> (x3+ 3x2 + x - 9) = (x - 1)
Montano1993 [528]

Answer:

x squared plus 2x minus 1.

Step-by-step explanation:

x3+3x2+x-9 is in the division "house" and x-1 is on the outside. xsquare times x equals x cubed. and x square times negative 1 equals -x squsre. put x square on top of the roof. change the signs. the x cubed cancels out. and bring down 2x square from subtracting 3x square and -x square and bring down the x-9. Put 2x on top of the roof too and 2x times x equals 2x square and multiply by -1. U will have 2x square -2x square and -2x plus x which equals -1x cuz the 2x square cancels out. bring down the -9. Now i have -1x-9. Multiply by -1 and put -1 on the roof. -1x+1x cancels out. and -1 times -1 equals positive 1. So -9+1=8. U van do any further cause as soon as the last number is at the end of the roof and u cant go further, ur done dividing. so the answer is x square+2x-1/×-1 +8 as the remainder. hope i helped

6 0
3 years ago
nickel has an approximate diameter of 20 mm and an approximate thickness of 2 mm what is the approximate volume of a stack of 40
ziro4ka [17]

Answer:

The approximate volume of a stack of 40 nickels is 25132.741 cubic milimeters.

Step-by-step explanation:

A nickel can be modelled by the formula of a right cylinder, the approximate volume of the stack of nickels (V_{net}), measured in cubic milimeters, is the product of the number of elements (n), no unit, and the volume of each element (V), measured in cubic milimeters. That is:

V_{net} = n\cdot V (1)

By volume equation of right cylinder, we have the following formula:

V_{net} = \frac{\pi}{4}\cdot n \cdot D^{2}\cdot h (2)

Where:

n - Amount of nickels, no unit.

D - Diameter of nickel, measured in milimeters.

h - Thickness of nickel, measured in milimeters.

If we know that n = 40, D = 20\,mm and h = 2\,mm, then the net volume of the stack of nickels is:

V_{net} = \frac{\pi}{4}\cdot (40)\cdot (20\,mm)^{2}\cdot (2\,mm)

V_{net} \approx 25132.741\,mm^{3}

The approximate volume of a stack of 40 nickels is 25132.741 cubic milimeters.

8 0
3 years ago
Please Answer ASAP, Thx! 5x -2y=17 and 4x - 3y= 8
iVinArrow [24]

5x - 2y = 17

4x - 3y = 8

Try to change one of the equations to isolate a variable, so you can use the new equation and substitute it into the other equation.

5x - 2y = 17

-2y = 17 - 5x

y = -17/2 + 5/2x

Now plug this into the second equation

4x - 3(-17/2 + 5/2x) = 8

4x + 51/2 - 15/2x = 8

8/2x - 15/2x = 16/2 - 51/2

-7/2x = -35/2

x = 5

Plug this into either equation to find y

4x - 3y = 8

4(5) - 3y = 8

20 - 3y = 8

-3y = -12

y = 4


x = 5, y = 4

5 0
3 years ago
Let x = -3, y = -2, and z= 7. What is the<br>value of this expression?<br>yz+ 2(2-x)​
Alja [10]

Answer:

so the expression should be -2+7+2(2-(-3))

3 0
3 years ago
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