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2 years ago

12

Bob bought n packs of pencils. Each pack has 15 pencils. Write an equation to represent the total number of pencils that Bob bou

ght.

1 answer:

Keith_Richards [23]2 years ago

3 0

Step-by-step explanation:

each pack 15 pencil

n* 15= 15n

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6.4

Step-by-step explanation:

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3 years ago

What is the sum of radical 28and radical 63

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3 years ago

Selena was comparing the flying speeds of different birds in science class. Which of the three birds flies fastest? Why?

Mashcka [7]

Answer:

Option C. The robin flies fastest because its rate is 15 m/s

Step-by-step explanation:

Let

x -----> the time in seconds

y ----> the distance in meters

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The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

take two points from the table

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$m=\frac{45-30}{3-2}$

$m=\frac{15}{1}$

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<em>Cardinal's Flight</em>

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<em>Blue Jay's Flight</em>

take two points from the graph

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Compare

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4 0

3 years ago

Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth. 5x+2y=7

Rashid [163]

5x + 2y = 7....multiply by -3
-2x + 6y = 9
----------------
-15x - 6y = -21 (result of multiplying by -3)
-2x + 6y = 9
---------------add
-17x = - 12
x = 12/17 or 0.7

5x + 2y = 7
5(12/17) + 2y = 7
60/17 + 2y = 7
2y = 7 - 60/17
2y = 119/17 - 60/17
2y = 59/17
y = 59/17 * 1/2
y = 59/34 or 1.7 when rounded <====

4 0

3 years ago

Read 2 more answers

Examine the system of equations. Which is an equivalent form of the first equation that when added to the second equation elimin

seraphim [82]

Answer:

10x - 12y = 192

Step-by-step explanation:

Given the equation :

-5/8x + 3/4y = 12 - - - (1)

8x + 12y = 11 ___(2)

The equivalent form of the first equation which can eliminate the y term :

Multiply (1) by - 16 :

-5/8x * - 16 + 3/4y * - 16 = 12 * - 16

10x - 12y = 192

Hence, Adding the obtained equation and equation(2) will eliminate.

8 0

3 years ago