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kaheart [24]
4 years ago
10

calvin paints pictures and sells them at art shows. He charges $56.25 for a large painting. He charges $25.80 for a small painti

ng. Last month he sold six large paintings and three small paintings. How much did he make in all?
Mathematics
2 answers:
Naddika [18.5K]4 years ago
8 0
$414.90 bc 56.25×6 + 25.80×3
stellarik [79]4 years ago
3 0
The answer is 1,111.90
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Step-by-step explanation:

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dem82 [27]
Ratio 10:6
so 10+6 = 16

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3 years ago
If x varies directly with y and x = 6 when y = 15, find x when y= 20.
Kaylis [27]

Answer:

8

Step-by-step explanation:

Varies directly think y=kx

Varies indirectly think y=k/x

We have first option so y=kx

x=6 and y=15 means we have 15=k(6)

So k=15/6 or reducing gives=5/2

So we just found our constant of proportionality, this number never changes.  It stays the same no matter what x or y they give you...

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6 0
3 years ago
Simplify the expression.
spayn [35]

Answer:

C. \huge\frac{1}{3x {y}^{2}  {z}^{4}}

Step-by-step explanation:

(9 {x}^{2}  {y}^{4}  {z}^{8} )^{  - \frac{1}{2} }  \\   \\  = ( {3}^{2}  {x}^{2}  {y}^{4}  {z}^{8} )^{  - \frac{1}{2} }  \\  \\  =  \frac{1}{( {3}^{2}  {x}^{2}  {y}^{4}  {z}^{8} )^{ \frac{1}{2} }}  \\  \\  =  \frac{1}{(3x {y}^{2}  {z}^{4})^{2 \times  \frac{1}{2} }  }  \\  \\  =  \frac{1}{3x {y}^{2}  {z}^{4}} \\  \\  \red{ \bold{ \therefore \: (9 {x}^{2}  {y}^{4}  {z}^{8} )^{  - \frac{1}{2} } =  \frac{1}{3x {y}^{2}  {z}^{4}} }}\\

7 0
4 years ago
The product of a number and 9 less than the number is 90. Find the number.
Goryan [66]

Let's say this number is a:
a*(a-9) = 90
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a = 15 or a = -6
Therefor a. would be the correct answer :)
7 0
3 years ago
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