Answer:
a = 3, b = - 7
Step-by-step explanation:
Substitute x = 2 into the equation and equate to 5, that is
a(2)² + b = 5
4a + b = 5 → (1)
Substitute x = 3 into the equation and equate to 20
a(3)² + b = 20
9a + b = 20 → (2)
Subtract (1) from (2) term by term to eliminate b
(9a - 4a) + (b - b) = (20 - 5), that is
5a = 15 ( divide both sides by 5 )
a = 3
Substitute a = 3 into either of the 2 equations and solve for b
Substituting in (1)
4(3) + b = 5
12 + b = 5 ( subtract 12 from both sides )
b = - 7
Answer:
True
Step-by-step explanation:
This is just a general property to know, I don't want to prove it LOL
Answer:
Elena's sales and expenses will both be $
396
if she sells
36
boxes of cards.
Step-by-step explanation:
Answer:
3/2
Step-by-step explanation:
3⁄4 ÷ 2⁄4
Copy dot flip
3/4 * 4/2
Rewriting
3/2 * 4/4
3/2
Answer:
2334546
Step-by-step explanation:
the answers is 2/3 /4/2 and 5/6
