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rjkz [21]
2 years ago
14

The graph shows the solution to which system of equations?

Mathematics
1 answer:
Law Incorporation [45]2 years ago
4 0

Answer:

C) y = 2x - 3 and y = -2x - 1.

Hope this helps you!

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Two automobiles leave the same city simultaneously and both head towards another city. The speed of one is 10 km/hour greater th
Veronika [31]

Answer:

5091 Km/hr and 505 km/hr

Step-by-step explanation:

Speed = Distance / Time

Let the speed of first automobile be 'x' and that of the second be 'y'

Since speed of one is 10 times greater than the other. therefore;

⇒ x = 10 y

also let time for faster automobile be 'T' and time for slower auto mobile be 't'

Since first arrive one hour earlier than second, therefore;

⇒ t = T + 1

⇒ For first automobile; x X T = 560 ; substituting for 'x' and 'T'. Therefore;

⇒ 10y (t+1) = 560

⇒ For Second automobile; y X t = 560

⇒ y = \frac{560}{t}

⇒ 10(\frac{560}{t})(t + 1) = 560

⇒ 5600 + \frac{5600}{t} = 560

⇒ 5600 - 560 =  -  \frac{5600}{t}

⇒ t = 1.11 hr

also ; T = 1.11 - 1 = 0.11 hr

Speed of 1st auto  = 560/0.11 = 5091 km /hr

Speed of 2nd auto = 560/1.11 = 505 km/hr

8 0
3 years ago
Explain how to determine if a proportional relationship exist between two variables in a table
Rufina [12.5K]

Answer:

  a proportional relationship exists if the ratio of values is a constant

Step-by-step explanation:

The equation describing a proportional relationship is ...

   y = kx

If you are given a table of values of x and y, they will be proportional if ...

  y/x = k

for all (x, y) pairs.

3 0
3 years ago
PLEEASE HELP!!!! I WILL GIVE BRAINLIEST!!!!!
Vika [28.1K]

Answer:

7

Step-by-step explanation:

Set up an equation using slope intercept form.

y = mx + b

75 = 8x + 15

Solve.

75 = 8x + 15

-15          -15

60 = 8x

7.5

Round down as it is dealing with money and he would not have enough to purchase an 8th grocery.

7 is the final answer.

Hope this helps!

3 0
2 years ago
Read 2 more answers
What is the exact volume of the cylinder
GrogVix [38]
V=hpir^2
h=20
r=12

v=20pi12^2
v=20pi144
v=2880pi

2nd one is answer
3 0
3 years ago
Read 2 more answers
Show as a picture 20 x 3 1/5
alex41 [277]

Hello! ;3

<em>Steps:</em>

<h3><em>\frac{20}{1} </em></h3><h3 />

<u><em>we have to convert the mixed fraction to improper :D</em></u>

<h3>3×5+1=16</h3><h3 /><h3>\frac{16}{5}</h3><h3 /><h3><em>\frac{20}{1}  × </em>\frac{16}{5} =</h3><h3 /><h3>\frac{320}{5}  </h3><h3 /><h3><u><em>Divide:</em></u></h3><h3 /><h3><u><em>320 ÷ 5 =</em></u></h3><h3 /><h2><u>64 </u></h2><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 /><h2 />

YOU'RE WELCOME :3

<h3 /><h3 />
7 0
3 years ago
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