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dangina [55]
4 years ago
9

Write an expression for the amount of change you will get when you pay for a purchase p with a 20 dollar bill. Make a table to f

ind the amounts of change you will get for purchases of 11.59 17.50 19.00 20.00
Mathematics
2 answers:
White raven [17]4 years ago
7 0

Answer:

Let p be the purchase price, and c be the change.

The amounts of change means 20 dollars minus purchase amount.

The expression becomes:

20- p =c

When p = $11.59

c = 20-11.59

c = $8.41

When p = $17.50

c = 20-17.50

c = $2.50

When p = $19

c = 20-19

c = $1.00

When p = $20

c = 20-20

c = $0.00

Mashutka [201]4 years ago
3 0

change,c = 20 - p

so in Excel for example

put 20 in column a

put 11.59, 17.50 etc in column b

in column c put the equation '=20 - b1'

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The Area of the circles
NNADVOKAT [17]

Answer:

254.4 in²

Step-by-step explanation:

Area of a circle is given by the formula:

\pi r^{2}

Our radius is 9 so we substitute this into the equation:

π(9)² = 81π

81π = 254.4 in²

6 0
2 years ago
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noname [10]
Root of x = 4  means (x - 4) is a factorMultiplicity of two means that (x - 4) is used twice root of x= -4 means that (x+ 4) is a factormultiplicity of 1 means it is used once so y = a (x-4) (x-4) (x + 4)y = a (x^3 - 4x2 - 16x + 64)
Thus, any polynomial with these zeroans d as a minimum these multiplicities will be a multiple (scalar or polynomial) of this P(x).
3 0
4 years ago
Right triangles abc and dbc with right angle c are given below. If cos(a)=15,ab=12 and cd=2, find the length of bd.
dmitriy555 [2]

see the attached figure to better understand the problem

we have that

cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units

Step 1

<u>Find the value of AC</u>

we know that

in the right triangle ABC

cos (A)=(AC/AB)\\AC=AB*cos(A)

substitute the values in the formula

AC=12*(1/5)\\ AC=2.4\ units

Step 2

<u>Find the value of BC</u>

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}

substitute the values

BC^{2}=12^{2} -2.4^{2}\\BC^{2}= 138.24\\ BC=11.76\ units

Step 3  

<u>Find the value of BD</u>

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

BD^{2} =DC^{2}+BC^{2}

substitute the values  

BD^{2} =2^{2}+11.76^{2}

BD=11.93\ units

therefore

<u>the answer is</u>

the length of BD is 11.93 units

8 0
3 years ago
Read 2 more answers
What is an equation of the circle with center (-5,4) and a radius of 7?
OleMash [197]

Answer:

Option D

Step-by-step explanation:

Given:

  • Center point: (-5, 4)
  • Radius: 7

<u>Formula:</u>

Equation of circle: (x - h)² + (y - k)² = r²

[Where (h, k) is the center point and "r" is the radius of the circle]

<u>Substitute the coordinates of the center point in the formula:</u>

Given center point: (-5, 4)

∴ x-coordinate of center point (h) = -5; y-coordinate of center point (k) = 4

  • ⇒ (x - h)² + (y - k)² = r²
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<u>Substitute the radius in the formula:</u>

Given radius: 7

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<u>Simplify both sides of the equation:</u>

  • ⇒ [x + 5]² + [y - 4]² = (7)(7)
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Therefore, Option 4 is correct.

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IRINA_888 [86]

Answer:

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answer: function

Step-by-step explanation

Function

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