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2 years ago

Solve the following:

Mathematics

2 answers:

swat322 years ago

4 0

Answer:

C 2 1/8

Step-by-step explanation:

7 2/8-5 1/8

= 7-5 + 2/8-1/8

=2+1/8

=2 1/8 or 2.125

Hope this helps =)

vladimir1956 [14]2 years ago

4 0

Answer:

The answer is B.

Step-by-step explanation:

2 1/8 is the answer

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If 5 dozen roses can be purchased for $62.50, how much will 8 dozen cost?

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Answer:

For A = 32/5 and B = 8 the system of equations will have infinitely many solutions.

Step-by-step explanation:

Given equations are:

4x + 5y = 10

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The general form of linear equation in two variables is given by:

$ax+by = c$

Here a, b and c are constants and x,y are variables.

In the given equations, after comparing with the general form

$a_1 = 4\\b_1 = 5 \\c_1 = 10\\a_2 = A\\b_2 =B\\c_2 = 16$

"In order for a system of equations to have infinity many solutions,

$\frac{a_1}{a_2} = \frac{b_1}{b_2} = \frac{c_1}{c_2}$ "

Putting the values we get

$\frac{4}{A} = \frac{5}{B} = \frac{10}{16}\\\frac{4}{A} = \frac{5}{B} = \frac{5}{8}\\Now\\\frac{4}{A} = \frac{5}{8}\\\frac{A}{4} = \frac{8}{5}\\A = \frac{8}{5} * 4\\A = \frac{32}{5}\\And\\\frac{5}{B} = \frac{5}{8}\\\frac{B}{5} = \frac{8}{5}\\B = 8$

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