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makkiz [27]
2 years ago
12

give the coordinates (-6,5) and (4,-8) find the distance between the two points. Round your answer to the nearest tenth

Mathematics
1 answer:
scoundrel [369]2 years ago
5 0

Answer:

16.4

Step-by-step explanation:

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Julio bought 4 pencils and 3 erasers for $0.37 and David paid $0.33 for 3 pencils and 4 erasers. What is the cost of one pencil?
nirvana33 [79]

Answer:

Each pencil costs $0.07 and each eraser costs $0.03

Step-by-step explanation:

System of linear equations

It refers to the study of systems when n variables are related in m linear equations, each one is not independent from the others. Solving such systems can be done following very diverse approaches.  

Let p=the price of each pencil while e is the price each eraser

Julio bought 4 pencils and 3 erasers, spending

4p+3e=0.37

David bought 3 pencils and 4 erasers, spending

3p+4e=0.33

The system of equations is written in the form

\left\{\begin{matrix}4p+3e=0.37\\ 3p+4e=0.33\end{matrix}\right

We'll solve it by reduction. Multiplying the first equation by -3 and the second by 4:

\left\{\begin{matrix}-12p-9e=-1.11\\ 12p+16e=1.32\end{matrix}\right.

Adding both equations:

7e=0.21  

e=0.03

Multiplying the first one by -4 and the second by 3

\left\{\begin{matrix}-16p-12e=-1.48\\ 9p+12e=0.99\end{matrix}\right.\end{matrix}\right.

Adding both equations:

-7p=-0.49

p=0.07  

Solution: Each pencil costs $0.07 and each eraser costs $0.03

7 0
2 years ago
Determine the slope and the y-intercept of the line represented by the equation y= -7/3×+3 slope: 7/9 ;y-intercept: 3 slope: 9/7
Mademuasel [1]

Answer:

slope ⟹ \:  -  \frac{7}{9}  \\ y  \:  intercept⟹ \: 3

Step-by-step explanation:

The standard form of this equation is

y = mx + c \\

m stands for the gradient or the slope, and c represents the y-intercept

y = mx + c \\ y =  -  \frac{7}{9} x + 3 \\ m =  -  \frac{7}{9}  \:  \\ and \:   \\  \: y \: intercept \:  = 3

7 0
2 years ago
Y = -3x - 13<br> 9x - 2y = -4
Eddi Din [679]

Answer

6

Step-by-step explanation:

5 0
2 years ago
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Can anyone help with this pls
puteri [66]

Answer:

9

Step-by-step explanation:

7 0
2 years ago
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CAN SOMEONE PLEASE HELP!! I DONT UNDERSTAND. i WILL GIVE BRAINLIEST!!!!
HACTEHA [7]

Answer:

u should give me the formula for ur question cuz I kind of understand but I did it years ago

7 0
2 years ago
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