It could be just 4x^2-12=0?
Answer:
13.
Step-by-step explanation:
Cross multiply:
Remove the brackets: 3(3x-15) = 2(2x+10)
Move the terms: 9x-45 = 4x+20
Collect like terms and calculate: 9x-4x=20+45
Divide both sides: 5x = 65
Answer:
Step-by-step explanation:
Let x be the number we want to find.
First we analyze the given informations
Info 1 : <u><em>Two times the sum of four times a number plus six</em></u>
We translate this statement (info 1) mathematically as : 2×(4x + 6)
Info 2 : <u><em>five less than twice the same number</em></u>
We translate this statement (info 2) mathematically as : 2x - 5
Info 1 <u><em>is the same as</em></u> Info 2 ⇔ 2×(4x + 6) = 2x - 5
2×(4x + 6) = 2x - 5
⇔ 8x + 12 = 2x - 5
⇔ 8x - 2x = -5 - 12
⇔ 6x = - 17
⇔ x = -17/6
9514 1404 393
Answer:
D) y-intercept: (0, -10); vertex: (2, -2); zeros: none
Step-by-step explanation:
The graph does not cross the x-axis, so there are <em>no real zeros</em>. It crosses the y-axis at (0, -10), so that is the y-intercept.
These observations match choice D.