The equations x - 2y = 4, 4x +5y = 8, 6x - 5y = 15, and x + 2y = 0 are shown on the graph below. Which system has solution of approximately (1.8, -0.9)?

Also is there a way to solve these questions quicker. I have 6 more like this and I only 16 min. left.

answer: about 22.67

step-by-step explanation:

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: