$\left\{\begin{array}{ccc}2x+5y=20&\text{multiply both sides by 2}\\3x-10y=37\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x+10y=40\\3x-10y=37\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad7x=77\qquad\text{divide both sides by 7}\\.\qquad\boxed{x=11}\\\\\text{Put the value of x to the first equation:}\\\\2(11)+5y=20\\\\22+5y=20\qquad\text{subtract 22 from both sides}\\\\5y=-2\qquad\text{divide both sides by 5}\\\\\boxed{y=-\dfrac{2}{5}}\\\\Answer:\ \boxed{x=11\ and\ y=-\dfrac{2}{5}}$

6 0

2 years ago

Trudy bought a $40 prepaid long distance card. For every minute hat she talks, &0.25 is deducted from her balance on the car

bezimeni [28]

The x intercept is the amount of money she has and I don't know what it is.... sorry. I knew what it stood for though.

8 0

3 years ago

Hi, I need some help with the last question of the first problem and the answer to the second page.

bulgar [2K]

Answer:

46.9 for the first one

Step-by-step explanation:

So sorry if i'm wrong <3

6 0

2 years ago

Can you please help me with the question the link is down below

Shkiper50 [21]

Answer:

output = 9

Step-by-step explanation:

add 5 to the input to obtain output

output = 4 + 5 = 9

7 0

2 years ago