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49/100 is equal to .49 in decimal form, and now we just need to add the 4 wholes. This is equal to 4.49
Answer:
![7x^{2} - 15x -31](https://tex.z-dn.net/?f=7x%5E%7B2%7D%20-%2015x%20-31)
Step-by-step explanation:
![(4x^{2} - 15x -21) + 3x^{2} - 10 = 4x^{2} + 3x^{2} - 15x -21 - 10 = 7x^{2} - 15x -31](https://tex.z-dn.net/?f=%284x%5E%7B2%7D%20-%2015x%20-21%29%20%2B%203x%5E%7B2%7D%20%20-%2010%20%3D%204x%5E%7B2%7D%20%2B%203x%5E%7B2%7D%20-%2015x%20-21%20%20-%2010%20%3D%207x%5E%7B2%7D%20-%2015x%20-31)
Answer:
5
Step-by-step explanation:
6a = (a*-3) + 45
then:
6a = -3a + 45
6a + 3a = 45
9a = 45
a = 45/9
a = 5
Check:
6*5 = (5*-3) + 45
30 = -15 + 45