Ineed solving this problem for mental math strategies for multiplication and the problem is 7×312=7×(_+_)

12 300

Step-by-step explanation:

The way that I would do this, is first doing 7*300. That would result in 2100.

Next would be doing 7*12. Resulting in 84.

Finally you would add 2100 and 84 which is very simple just 2184.

If 300 looks like a tough number to multiply, just do 7*3 then add two 0's to the end.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

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: