30/2 = 15
15 x 5 = 75
The number is 75.
Hello :
4(3x² +2)-9=8x²+7 = <span>4(3x^2 +2)-9 +9 =8x²+7 +9
= </span><span> 4(3x² + 2)=8x² + 16
</span><span>(State a reason why1) Addition Property of Equality)</span>
Answer: 2.1, I don't really know how to show a model for this, its just that when you multiply 3 and 7 you get 21, when you do 0.7 and 3, you just put the decimal place between the 2 and 1.