When adding or subtracting with scientific notation why is it important to have the same power of 10

Liam and Tehya are trying to determine whether ΔABC and ΔEFD can be proven congruent through rigid motions. Liam says that ΔABC ≅ ΔEFD because ΔABC can be reflected over the y-axis to create ΔEFD.

Find the area of r = 4.5

If a line is perfectly vertical, meaning it reaches all y - at a single x-, which kind of slope does it have? A. Zero B. Undefined C. Negative D. Positive

Find the 90th percentile for the data set: 6283, 5700, 6381, 6274, 5700, 5896, 5972, 6075, 5993, 5581

5. Aaron has sewn three square tablecloths of different sizes. He determines the length of the diagonal of each square tablecloth. Part A The yellow tablecloth has a diagonal of The yellow tablecloth has a diagonal of √18 feet.

For the given arithmetic sequence find the common difference, d. 4, 1.75, - 0.5,-2.75

Is this question true or false 11=√101

Casey has a total of 18 pens. Twelve of these pens are blue, and the rest are red. What is the ratio of blue pens to red pens?

Which of the following is a monomial? A. 2x + yz B. 2xyz2 C. 2x - yz D. 2 + xyz

Written as fractions, the decimal numbers 0.3 and 0.11 are 3/10 and 11/100, respectively