All categories

4 years ago

Just confused on how to solve this

Mathematics

1 answer:

muminat4 years ago

8 0

Answer:

(14/5,-11/5)

Step-by-step explanation:

(5x-5y=25)/5

x-y=5 equation 1

3x+2y=4 equation 2

solve 1&2

You might be interested in

Write an equation for the line that passes through (-2,4) and (0,7)

xz_007 [3.2K]

Answer:

y = 3/2x + 7

Step-by-step explanation:

The slops is rise over run, so in this case the slope is 3/2 because it goes up 3 units while going 2 units to the right.

The points (0,7) is on the y axis. This means that 7 is the y intercept

With this information, we can follow the format of the slope intercept equation: y = mx + b

m stands for the slope and b stands for the y intercept. Plugging the information in, our equation is:

y = 3/2x + 7

8 0

3 years ago

A go-cart racetrack has 100-meter straightaways and semicircular ends with diameters of 40 meters. Calculate the average speed i

emmainna [20.7K]

Answer:

Average speed of go cart is 217.07 meters per minute.

Step-by-step explanation:

We are given the following in the question:

Length of straightway racetrack = 100 m

Diameter of semicircular end = 40 m

Radius =

$r = \dfrac{d}{2} = \dfrac{40}{2} = 20\text{ m}$

Perimeter of racetrack =

Perimeter of semicircle + 2(Length of straightway) + Perimeter of semicircle

$=\pi r + 2(100) + \pi r\\=2\pi r + 2(200)\\=(2\times 3.14\times 20) + 200\\=325.6\text{ m}$

Speed =

$s = \dfrac{\text{Distance}}{\text{Time}}\\\\s = \dfrac{4\times \text{Perimeter of track}}{6}\\\\s = \dfrac{4\times 325.6}{6}\\\\s = 217.06\text{ meter per minute}$

Thus, average speed of go cart is 217.07 meters per minute.

4 0

3 years ago

Please help ASAP!!!!

Genrish500 [490]

Answer:

is B

Step-by-step explanation:

4 0

3 years ago

What is 4+ 12? PLease answer. :)

Tju [1.3M]

16 is ur a. hope it helps

4 0

3 years ago

Read 2 more answers

Which of the following characteristics best describes the given function of ƒ(x) = 3x2 ?

lawyer [7]

The characteristics best describes the given function of ƒ(x) = 3x2 is quadratic function, U-shape, and minimum. Option C. This is further explained below.

<h3>What is a function?</h3>

Generally, the function is simply defined as one that uses one or more variables in an expression or connection.

In conclusion, The characteristics that best describe the given function of ƒ(x) = 3x2 are: it illustrates on a graph an upside parabola, it has a root x=0 and finally its a Qufdradic function

Complete Question

Which of the following characteristics best describes the given function of ƒ(x) = 3x2?

quadratic function, U-shape, maximum

quadratic function, U-shape, minimum

quadratic function, V-shape, minimum

quadratic function, V-shape, maximum