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tigry1 [53]
3 years ago
10

If the cost of making 20 copies is $1.30, how much will 1 copy cost?

Mathematics
1 answer:
Norma-Jean [14]3 years ago
8 0

Answer:

6,5

Step-by-step explanation:

1 dollar 30 cent = 130 cent

20 copies=130

1 copy=130/20=6,5

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Which algebraic expression is a polynomial? 3m2n-2m/n+1/n
Lesechka [4]

Answer:

d) 7mn+\frac{3m}{2}+\frac{5n}{4}

Step-by-step explanation:

Which algebraic expression is a polynomial?

a)3m^2n-\frac{2m}{n}+\frac{1}{n}  \\b)\frac{2mn}{5}-\frac{\sqrt{m} }{4} +4m^5\\c)\frac{4m^3}{n^2}-3mn^5+\sqrt{8}\\d)7mn+\frac{3m}{2}+\frac{5n}{4}

Answer: A polynomial is an expression with variables and coefficients separated by addition and subtraction. The following are used when determining if an expression is a polynomial:

i) Variables of a polynomial must not have negative exponent.

ii) Variables of a polynomial must not have fractional exponent.

iii) Dividing by an exponent is not allowed

iv) Exponent radicals are not allowed.

a) 3m^2n-\frac{2m}{n}+\frac{1}{n} is not a polynomial because dividing by an exponent is not allowed.

b) \frac{2mn}{5}-\frac{\sqrt{m} }{4} +4m^5, is not a polynomial because exponent radicals are not allowed (√m)

c) \frac{4m^3}{n^2}-3mn^5+\sqrt{8} is not a polynomial because dividing by an exponent is not allowed.

d) 7mn+\frac{3m}{2}+\frac{5n}{4} is a polynomial

4 0
2 years ago
A jet travels 530 miles in 5 hours. What is the speed (unit rate) at which the jet traveled? How far can the jet go in 12 hours?
Citrus2011 [14]

Answer:

unit rate is 106 miles per hour and it can go 1272 miles in 12 hours

Step-by-step explanation:

-divide 530 by 5 and you get 106 miles an hour.

-then multiply 106 by 12 to get 1272 miles an hour.

7 0
2 years ago
Find the value of x in the triangle shown below
elixir [45]

Answer:

A) x=6

Step-by-step explanation:

6.5^2-2.5^2=x^2

42.25-6.25=x^2=36

x=6

3 0
2 years ago
Read 2 more answers
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UkoKoshka [18]

Answer:

( 7 n+ 3 )  ( n + 7 )

Step-by-step explanation:

factor by grouping

3 0
2 years ago
Each square on olivias chessboard is 11 square centimeters. a chessboard has 8 squares on each side. To the nearest tenth, what
levacccp [35]
The answer is 9 centimeters rounded up. You multiply 11 squares by 8 squares which is 88(9 rounded up) and the answer is the same on each side which means the width is 9 centimeters rounded up.
7 0
3 years ago
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