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hoa [83]
3 years ago
13

Recommendations

Mathematics
1 answer:
Roman55 [17]3 years ago
7 0

Answer:

Step-by-step explanation:

27 ÷ 90 = 0.3 = 0.30 = 30%

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The probability of event A is 0.56, and the probability of event B is 0.34. If A and B are independent events, then P(A and B) =
Leni [432]
.90 is the answer i belive
4 0
3 years ago
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The pH scale for acidity is defined by pH= -log subscript 10 [H superscript+] where [H superscript+] is the concentration of hyd
gtnhenbr [62]

Answer:

The concentration of hydrogen ions in moles per liter (M) is 3.981 * 10^{-9}

Step-by-step explanation:

As we know

The hydrogen ion concentration of any solution at pH is given by

H^+ = 10^{-pH}

Substituting the given values in above equation, we get -

H^+ = 10^{-8.4}\\H^+ = 3.981 * 10^{-9} mol/l

The concentration of hydrogen ions in moles per liter (M) is 3.981 * 10^{-9}

8 0
3 years ago
The perimeter of parallelogram is 72 meters. The width of the parallelogram is 4 meters less than its length . Find the Length a
Marrrta [24]
Let n = length
let n-4 = width since it is 4 meters shorter

2( n+n-4)  =72  Two of the length and width added together equal the perimeter
combine like terms
2(2n -4) = 72   Now use the distributive law on the left side of the equation
4n -8 = 72    Now add 8 to both sides

4n -8 +8 = 72 +8
4n = 80  Finally divide each side by 4
n=20
so the length is 20 and the width is 4 less or 16.
Let's see if our answer works.
20 + 16 + 20 +16 =?  72
 72 =72  yes, it does.   Length = 20 Width = 16
6 0
2 years ago
The curve with equation y2 = x3 + 3x2 is called the tschirnhausen cubic. find an equation of the tangent line to this curve at t
MAVERICK [17]
First find the slope, take derivative of both sides with respect to x.  
2y dy/dx=3x^2+6x
solve for dy/dx
dy/dx=[3x^2+6x]/2y
plug in given vales of (1,2(
dy/dx=9/4

now you have everything you need to plug into point slope form
y-2=(9/4)(x-1)
answer is y=(9/4)x+(1/4)
5 0
3 years ago
What is the slope of the line passing through the ponts (3,3) and (5,7)?
antoniya [11.8K]
This problem has a slope of 2

7-3. 4
----- = ---. = 2
5-3. 2
6 0
3 years ago
Read 2 more answers
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