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loris [4]
3 years ago
8

3a.) Today, everything at a store is on sale. The store offers a 20% discount. 1 poin

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0

Answer:

14.40

Step-by-step explanation:

100%-> 18

100-20=80

80%-> 14.40

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What is the value of y+2x+3, if x=4 and y=11
maksim [4K]

Answer:

11+ 8+3=22

Step-by-step explanation:

4 0
3 years ago
How do you solve 3px=2q (r-5x) , Solve for x ??
VashaNatasha [74]
Okay for this question the answer is x=0.
5 0
3 years ago
2| x-3| - 5 = 7 Helpp
klasskru [66]

Answer:

x = {9, -3}

Step-by-step explanation:

  • 2| x-3| - 5 = 7
  • 2| x-3|  = 12
  • | x-3| = 6
  • x - 3 = ± 6
  • ⇒ x= 3+ 6= 9
  • ⇒ x= 3 - 6= -3

Or it can be shown as:

  • x= {9, -3}

8 0
4 years ago
Read 2 more answers
Simplify:<br><br> 2(d + 3) + 3(d – 3)<br> A. –5d – 1<br> B. 5d – 3<br> C. 5d + 15<br> D. 6d – 3
Olin [163]

Step-by-step explanation:

1. multiply put the brackets

so it'll be 2d+6+3d-9

2. put into into like terms

2d+3d is 5d

6-9 is -3

There fore the answer is option B where it will be 5d-3

Hope this helps !!!

Have a nice day :)

4 0
3 years ago
For a Cosine function with amplitude =0.75 and period =10 , what is y(4) ?
frez [133]

We need to find a cosine function:


y(x)=acos(bx) \\ \\ where: \\ \\ \left|a\right|=Amplitude \\ \\ Period=\frac{2\pi}{b}


The amplitude represents half the distance  between the maximum and minimum values of the function and the period goes from the x-value of one peak to the x-value of the next one. Therefore:


a=0.75 \\ \\ b=\frac{2\pi}{10}=\frac{\pi}{5}


Finally:


\boxed{y(x)=0.75cos(\frac{\pi}{5}x)}


And y(4) is:


y(4)=0.75cos(\frac{\pi}{5}\times 4) \\ \\ \therefore \boxed{y(4)=-0.60}

4 0
3 years ago
Read 2 more answers
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