7. a model of a house is shown. what is the
perimeter of the model?
16 - 2x
7x + 11
13x – 4
a. 18x – 23
b. 31x – 14
c. 23x + 50
d. 36x + 46

Choose the number sentence that shows the identity property of addition. a. 122 = 61 + 61 b. 62 = 1 + 61 c. 61 = 0 + 61

10% of 1,900,000. show me how you got the answer

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?