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olga55 [171]
3 years ago
6

David is preparing for a dance competition. He needs to practice for 14 hours in 5 days. Which of the following statements show

that David is practicing according to the required rate?
A.
55 hours in 10 days
B.
67 hours in 12 days
C.
28 hours in 10 days
D.
22 hours in 15 days
Mathematics
2 answers:
schepotkina [342]3 years ago
6 0

Answer:

it's answer is C

hope it helps you

Elena L [17]3 years ago
5 0

Answer:

B is your answer

Step-by-step explanation:

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The relationship between the amount of tomato sauce and tomato paste needed for a pasta sauce recipe is shown in the following g
adoni [48]

Answer:

none of the above

Step-by-step explanation:

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3 years ago
You buy a total of 25 burgers and tacos for $67.50. The burgers cost $3.50 each and the tacos cost $2.25 each. Find the number o
Ahat [919]

Answer: you bought 9 burgers and 16 tacos

Step-by-step explanation:

Let x represent the number of burgers that you bought.

Let y represent the number of tacos that you bought.

You buy a total of 25 burgers and tacos. It means that

x + y = 25

The burgers cost $3.50 each and the tacos cost $2.25 each. The total cost of the burgers and tacos that you bought is $67.50. It means that

3.5x + 2.25y = 67.5- - - - - - - - - - - - 1

Substituting x = 25 - y into 1, it becomes

3.5(25 - y) + 2.25y = 67.5

87.5 - 3.5y + 2.25y = 67.5

- 3.5y + 2.25y = 67.5 - 87.5

- 1.25y = - 20

y = - 20/ - 1.25

y = 16

x = 25 - y = 25 - 16

x = 9

5 0
3 years ago
Larry read a 4 0 0 400-page book. He read at a rate of 1 0 10 pages per day for d d days. Write an equation that could be used t
Oksanka [162]

Answer:

IDK

Step-by-step explanation:

IDK

7 0
3 years ago
State the Midpoint formula?
kipiarov [429]
Let point A (x₁, y₁) and point B (x₂, y₂)

Mid-point formula is given by: [ \frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}]

The distance formula is given by: \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}

The two formula are alike because they both need the information of two coordinate points 

They are different because the mid point formula is adding up then divide by two, whereas the distance formula is subtracting then square the answer.

--------------------------------------------------------------------------------------------------------------
Real life problem involving distance formula:

Plane A is spotted on a radar with cartesian coordinate (450, 640).
Plane B is spotted on the same radar with cartesian coordinate (350, 540)

Work out the distance between plane A and plane B.
--------------------------------------------------------------------------------------------------------------
Real life problem involving mid point formula

Ms. Holland arranges a treasure hunt for a group of scouts. She marks two points, C and D, with cartesian coordinate (-5, 6) and (7, 10) respectively. The clue is that the treasure is buried in the middle point between C and D. Work out the coordinate where the treasure is buried.
 
8 0
4 years ago
Consider the system of linear equations. 5x+10y=15 10x+3y=13 To use the linear combination method and addition to eliminate the
antiseptic1488 [7]

Answer:

  A:  -2

Step-by-step explanation:

You want some factor k such that k(5x) +(10x) = 0. That is, 5k+10 = 0. The solution to this is k=-2, corresponding to selection A.

6 0
3 years ago
Read 2 more answers
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