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3 years ago

14

What percent is equivalent to 1230? A12% B30% C40% D60%

1 answer:

Reptile [31]3 years ago

6 0

To find the percentage of 12/30 you simply have to divide 12 by 30, and then multiply it by 100

(12/30)100

(0.4)100

40%

C) 40% is your answer

Hope this helps!

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Five notebooks cost $20. At this rate, how much would 2 notebooks cost

fenix001 [56]

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(Note that the unit cancels out so you get the answer)

Final answer: $8~

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3 years ago

Solve the system using substitution. Write the solution as an ordered pair. (1 point) SHOW YOUR WORK FOR FULL CREDIT! (2 points)

beks73 [17]

x = -2

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//Hope this helps.

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3 years ago

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Which system of linear inequalities is represented by the graph?

pentagon [3]

Answer:

Option D- y > x – 2 and y < x + 1

Step-by-step explanation:

To determine : Which system of linear inequalities is represented by the graph?

Solution : First we examine the graph

The shaded region in purple is drawn using two line

The first line above the origin passing through the points (0,1) and (-1,0)

The equation of line passing through two points is $y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

$y-1=\frac{0-1}{-1-0}(x-0)$

$y-1=x$

So, the equation of that line $y = x + 1$

The second line below the origin passing through the points (0,-2) and (2,0)

The equation of line passing through two points is $y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

$y-(-2)=\frac{0-(-2)}{2-0}(x-0)$

$y+2=x$

So, the equation of that line $y=x-2$

Now, to check the system of inequality substitute point (x,y)=(0,0)

First equation $y = x + 1$

$0$ means $y< x + 1$

Second equation $y = x-2$

$0>-2$ means $y> x-2$

Therefore, Option D is correct.

The linear inequalities of the system is y > x-2 and y < x + 1

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3 years ago

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Jackie runs and dances for a total of 55 minutes every day. She dances for 25 minutes longer than she runs.

butalik [34]

Answer:

Jackie runs for $15$ minutes and dances for $40$ minutes.

Step-by-step explanation:

Let the time she dances be $x$ and the time she runs for be $y$ minutes respectively.

$x+y =55\\x =y+25$

Use the substitution method here ,

$y+25+y=55\\2y+25=55\\2y=55-25\\y=\frac{30}{2} \\y=15\\x=y+25\\x=15+25\\x=40$

Therefore Jackie runs for $15$ minutes and dances for $40$ minutes.

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2 years ago

Equivalent expression with fewer terms to -9x-3x+15+x-4

kykrilka [37]

Answer:

−11x+11

Step-by-step explanation:

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3 years ago

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