7.8 is a rational number, sqrt(60.85) is irrational
Answer:
The answer is -22x² - 14x.
Step-by-step explanation:
You have to eliminate the brackets by multiplying :
Next you can simplify but there is no common terms in this expression so it remains the same.
Answer:
2.C
3.B
4.B
5.D
Step-by-step explanation:
2. the y intercept in this equation is the c value, which is 1 so the answer is c
3. The vertex of this function would be (9, -5) and the axis of symmetry is the first value so its 9, B
4. Not that hard, tip is to just distribute in all the answers and see which one gives you the original equation, it is B
5. You solve the original equation by completing the square, if you don't know how to do that look it up. Answer is D
You buy an item for $100 with 15% added tax. So we find 15% of 100:
100 • 0.15 = 15
(A quick math here, and percentage of 100 will always be the same number of the percentage, for example 32% of 100 will be 32.)
100 + 15 = 115
a) the true sale price of the item is $115 (with tax included)
b) you are buying a $15 tax (for the item)
(I hope these are correct, the questions are really vague)