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mezya [45]
3 years ago
11

Which of the following polynomial is a quadratic polynomial: (i)x²-7x+2 (ii) 7x²-x(x+2) (iii) 2x (x+5)+1 (iv) 2x-1​

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
8 0

Answer:

(iii)2x (x+5)+1 I guessss.....

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The sales tax for an item was $19.20 and it costs $480 before tax. Find the sales tax rate. Write your answer as a percentage
Zigmanuir [339]

Answer:

sales tax rate = 4%

Step-by-step explanation:

In this problem formula to express one term in percentage is used

To express x as percentage of y is given by (x/y*100) %

______________________________________________

Cost of item = $480

sales tax = $19.20

we have to find sales tax rate.

sales tax rate is percentage of cost price which will levied as tax .

thus, we have to find sales tax as percentage of cost price.

using the percentage cost as given above

sales tax as percentage = sales tax/ cost of item *100

sales tax as percentage = 19.20/480 *100 = 4%

Thus, sales tax rate is 4%.

It means that if cost price of item is $100 then $4 will be the sales tax for the item.

5 0
3 years ago
Over the past seven days, Mrs. Cho found that the temperature outside had dropped a total of 35
s344n2d4d5 [400]

Answer:

Average change in temperature each day = 5 degrees/day

Step-by-step explanation:

\frac{35}{7} = 5

8 0
3 years ago
Write an equation for each sentence 13 times the sum of a number and 5<br> is 91<br> I
Volgvan

Answer:13( n + 5) = 91

Step-by-step explanation: solve the parenthesis first and then multiply that by 13

7 0
3 years ago
2) Shane puts aside $40 per week for his monthly car payment. He earns $320 per week.
ExtremeBDS [4]

Answer:

12.5%

Step-by-step explanation:

320 divided by 40 = 8

100 divided by 8 = 12.5

100% is 320 dollars, which means that 40 dollars is 1/8 of 320. And 1/8 of 100 is 12.5%

8 0
3 years ago
7/9+7/54 what is the answer
kolbaska11 [484]

Answer:

49/54

Step-by-step explanation:

7/9 + 7/54

42/54 + 7/54

49/54

3 0
3 years ago
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