3 years ago

How can I explain with mental math

Mathematics

1 answer:

jeka943 years ago

6 0

Use a property that’s a good reason then tear it apart

You might be interested in

What is the answer for this i need help!!??

11Alexandr11 [23.1K]

Answer:

-243

Step-by-step explanation:

${( - 3)}^{ - 5} = \frac{1}{x} \\ \\ \therefore \: \frac{1}{ {( - 3)}^{ 5} } = \frac{1}{x} \\ \\ \therefore \: {( - 3)}^{ 5} = x \\ \\ \therefore \: - 243 = x \\ \\ \huge \red{ \boxed{\therefore \: x = - 243}}$

5 0

3 years ago

The perimeter of the figure below is 141.8ft. Find the length of the missing side

Irina18 [472]

Answer:8.6

Step-by-step explanation:

The easiest way to do this is for you to subtract all the sides from the total perimeter since the perimeter is all of the sides added and your remainder is your answer

Hope this helps

7 0

3 years ago

Read 2 more answers

What is the discriminant of the polynomial below

mr_godi [17]

The answer is a=0. I hope I helped

5 0

3 years ago

Sam has 15 identical rectangular windows in his home. The length of each window is twice the width, and the area of each window

marshall27 [118]

The answe would be 300 because, the perimeter of the windows is 12, then you have to multiply 25 to 12 then bam you get 300, yay!