3 years ago

What is the value of x in this equation -6x =72

Mathematics

2 answers:

Svetradugi [14.3K]3 years ago

7 0

The value of x in that equation is -12

devlian [24]3 years ago

7 0

X = -12

-6x = 72
Divide by -6 on both sides
-6x/-6 = x
72/-6 = -12
x = -12

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Solve h = −16t2 + 36t + 4.

kvasek [131]

I can do each of the things I asked above.
So, let's change this into vertex form:
$h=-16t^2+36t+4$
$h=(-16t^2+36t)+4$
$h=-16(t^2-2.25t)+4$
$h=-16(t^2-2.25t+1.27-1.27)+4$
$h=-16(t^2-2.25t+1.27)+20.32+4$
$h=-16(t-1.125)^2+24.32$
The vertex is at (1.125,24.32)
<span>Answers may vary due to rounding

</span>Factored Form:
$h = -16t^2 + 36t + 4$
$h = -4\left(4t^2-9t-1\right)$

Quadratic Formula:
$x = \frac{-b +/- \sqrt{b^2-4(a)(c)}}{2a}$
<span>h = -16t^2 + 36t + 4
</span>a = -16 b = 36 c = 4
$h = \frac{-(36) +/- \sqrt{(36)^2-4(-16)(4)}}{2(-16)}$
$h = \frac{-36 +/- \sqrt{1552}}{-32}$
$h = ≈-0.11$
$h = ≈2.36$

5 0

3 years ago

The price of a sandwich decreases from $8 to $6. What is the percentage decrease in the price of the sandwich?

bazaltina [42]

Answer:

It decreased by 25%

Step-by-step explanation:

8 x .25=2

8 - 2 = 6

5 0

2 years ago

During a recent thunderstorm, the temperature dropped 24° in 3 hours. What integer completes the equation to find the average ho