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3 years ago

Solve the system of inequalities by graphing. 2x+ 5y <25 y < 3x - 2 5x - 7 <14

Mathematics

1 answer:

sergey [27]3 years ago

7 0

Answer:

Step-by-step explanation:

Choice b is the only one that has the first equation properly graphed. The boundary line for that equation will have intercepts that can be found by setting the opposite variable to zero.

x-intercept = 25/2 = 12.5 (on the positive x-axis)

y-intercept = 25/5 = 5 (on the positive y-axis)

That is, the boundary line has a shallow negative slope, and is shaded below. Only graph 'b' has such a line.

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3^x-3^(x-2)=A*3^x solve for A

ale4655 [162]

Answer:

$a=\frac{8}{9}$

Step-by-step explanation:

$3^x-3x^{x-2} =a3^x$

Divide both sides by $3^x$ :

$3^{x-x}-3^{x-x-2}=a$

Simplify:

$3^0-3^{-2}=a\\a=1-\frac{1}{9} \\a=\frac{8}{9}$

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2 years ago

Which is a like radical to ^3 sqrt 54 after simplifying?

Pachacha [2.7K]

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2 years ago

Read 2 more answers

A. 4 b. 5 c. 9 d. 25

trapecia [35]

5t=45
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The answer is C
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2 years ago

A store marks up the price of a sweater by $7.35. The total cost of the sweater is 25.65. How much does the store pay for the sw

UNO [17]

Answer: the store paid $18.3 for the sweater

Step-by-step explanation:

Let x represent the amount that the store paid for the sweater.

A store marks up the price of a sweater by $7.35. This means that the new or current price of the sweater at the store would be

7.35 + x

The total cost of the sweater is 25.65. Therefore, an equation to represent the problem would be

7.35 + x = 25.65

Subtracting 7.35 from the left hand side and the right hand side of the equation, it becomes

7.35 + x - 7.35 = 25.65 - 7.35

x = $18.3

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2 years ago

Can anyone please help me answer this math question right away?

TiliK225 [7]

here help u 3/5

Step-by-step explanation: u want see my work?

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2 years ago