Answer:
54°
Step-by-step explanation:
ABD = 144°
ABD + CBD = 180°......(i)
CBD + DBE = 90°........(ii)
From (i)
144° + CBD = 180°
CBD = 180° - 144°
= 36°
From (ii)
CBD + DBE = 90°
36° + DBE = 90°
DBE = 90 - 36
= 54°
Answer:
I helped
Step-by-step explanation:
you okay do can I get some points cuh
On your graph, draw a horizontal line at y=5. Basically a line over (-3,5) to (3,5) or whatever the greatest x's are. Since it is greater than or equal to, it is a solid line. Greater than, you shade above the line
<span>sin x + cos x = l would be the answer</span>
Answer:
There are 10⁻⁷ hydrogen ions in one-liter water
Step-by-step explanation:
Hi there!
a. If the pH = 7.0, then:
-log(H) = 7.0
multiply both sides of the equation by -1
log(H) = -7.0
Apply 10ˣ to both sides
10^(log (H)) = 10⁻⁷
(H) = 10⁻⁷
There are 10⁻⁷ hydrogen ions in one-liter water.
Why 10^(log (H)) = (H)?
Let´s consider this function:
y = 10^(log x)
(Apply log to both sides)
log y = log 10^(log x)
(Apply logarithmic property: log xᵃ = a · log x)
log y = log x · log 10
(log 10 = 1)
log y = log x
y = x
(since y = 10^(log x) and y = x):
10^(log x) = x
That´s why 10^(log (H)) = (H)
