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4 years ago

Consider the graph below. Which of the following coordinates belong in the box?

Mathematics

2 answers:

MArishka [77]4 years ago

7 0

Answer:

Option b) (-26,-5)

Step-by-step explanation:

We are given the following information in the question.

The x-coordinate changes from -21 to-16. Thus its value increases 5 units.

The y -coordinate changes from -9 to -13. Thus, it decreases by a value of 4 units.

So to obtain the coordinates in the box:

x-coordinate

We decrease 5 units from -21 that is -21 - 5 = -26

y- coordinate

We add 4 units to -9 that is -9 + 4 = -5

So, the coordinates in the box is given as:

Option b) (-26,-5)

AveGali [126]4 years ago

5 0

I think it’s b my guess

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Which of the following are solutions to the equation below?

evablogger [386]

Answer:

x = 5 ± $\sqrt{17}$

Step-by-step explanation:

Given

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(x - 5)² = 17 ( take the square root of both sides )

x - 5 = ± $\sqrt{17}$ ( add 5 to both sides )

x = 5 ± $\sqrt{17}$

Thus

x = 5 - $\sqrt{17}$

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3 years ago

At what points does the graph of f(x)=2x^2-4x-16 intersect the x-axis

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4 years ago

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5 A classroom has 42 desks. Each row has 7 seats. Write an equation to find the number of rows in the classroom. Solve the equat

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Step-by-step explanation:

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3 years ago

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(-4a^3b^2?)^2 •(3a²b)

uranmaximum [27]

Answer:

48a^7 b^5 (I hope I got this right, it has been awhile since I've done equations like these)

Step-by-step explanation:

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3 years ago

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

3 years ago