Answer:
3.5
Step-by-step explanation:
The chemical acidity of a solution is measured in units of pH: pH=-log[H+], where [H+] is the hydrogen ion concentration in the solution. 1.58 x 10⁻⁹ is [H+] if the pH=8.8.
What do you mean by pH ?The term pH is defined as the negative logarithm of the [H+] hydrogen ion.
The isolated hydrogen ion, represented by the symbol H+, hence it is used to represent a proton. Because the bare nucleus can readily combine with other particles like electrons, atoms, and molecules, the hydrogen ion.
The formula for calculating [H+] hydrogen ion is as follows:
pH = - log[H+]
Given pH = 8.8
8.8 = - log[H+]
-8.8 = log[H+]
Taking Antilogarithm Both side
Antilog of [-8.8] = [H ]
By solving above expression [H+]
= 1.58 x 10⁻⁹
Thus, 1.58 x 10⁻⁹ is [H+] if the pH=8.8.
To learn more about the pH, follow the link;
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Multiply: two-thirds times six-sevenths Put your answer in lowest terms.
A. four-sevenths
B. four twenty-firsts
C. twelve twenty-firsts
D. three-sevenths
Answer:
i think I might be 0.57142857142 but if it’s wrong as g00gle
Step-by-step explanation:
Answer:
C. 12/21
Step-by-step explanation:
2/3 × 6/7 = twelve twenty first
List two equivalent numbers to 0.50
Ms.Fernandez needs to buy new carpet for her bedroom floor a model of the floor is shown on the right. If each square ft of carpet costs $2 how much will it cost her to buy the carpet
Answer:
Step-by-step explanation:
Suppose the length of the carpet is x ft.
and the breadth of the carpet is y ft.
So the area of the rectangular shape =[tex]length\times breadth[/tex]
Area=[tex]x\times y\ ft.^2[/tex]
Cost of carpet
[tex]=Area\times rate\\=xy\times 2\\=\$\ 2xy[/tex]
A paint roller, shown below, is used for painting large surfaces.
2in1
9 in
Figure not drawn to scale.
How many square inches does a single rotation of the paint roller cover? (Round to the nearest tenth of a square inch.)
Answer:56.5 in
Step-by-step explanation:
DIRECTIONS: Use this information to answer Parts A, B, and C.
A traffic cone has a diameter of 10 inches and a height of 27 inches.
Part A
Find the volume of the cone.
Answer:
V=706.85
Step-by-step explanation:
Well, first of when you want to find the volume of the cone you need to have a radius and hieght. And the radius is half the diameter, so divide the diameter into half: 10/2=5 in. and you already have the height so just plug in the numbers.
Formula: V= [tex]\frac{1}{3}[/tex][tex]\pi[/tex][tex]r^{2}[/tex]h ---> V= [tex]\frac{1}{3}[/tex][tex]\pi[/tex]([tex]5^{2}[/tex])(27)
And put the plugged in formula in your calculator and you'll find the answer!
V=706.85
I hope this helped.
Which equation represents the standard form of the equation y = (x + 3)2 - 4?
Answer:
D. y=x2+6x+1 :) hope this helps
Answer:
D
Step-by-step explanation:
Just took the test
Inequalities
3x-(2½-x)>0
3(4-y)>6-y
Please this is my 2 of my 10 assignment,please help me with it i would do the rest my self
Answer:
x=5,y=2
Step-by-step explanation:
THis are the answer's because in the inequalities u solve them and them u get your answer
I WILL GIVE BRAINLIEST PLSSS ANSWER
Answer:
C.
Step-by-step explanation:
Alright so basically you want to get the same denominator
3/4 = 6/8
And (6/8)/(1/8) = 6
So it's 6.
Answer:
3:32
Step-by-step explanation:
You multiply the numerators and denominators.
Krystal and Danielle each improved their yards by planting daylilies and ivy. They bought their supplies from the same store. Krystal spent $114 on 1 daylily and 12 pots of ivy. Danielle spent $150 on 10 daylilies and 10 pots of ivy. Find the cost of each item.
Answer:
$9 and $6Step-by-step explanation:
Let the cost of daylilies = d and ivy = i, then we have below equations:
d + 12i = 11410d + 10i = 150Simplify the second equation:
d + i = 15Subtract the second equation from the first:
d - d + 12i - i = 114 - 1511i = 99i = 9, ivy costs $9Now find d:
d = 15 - 9 = 6, daylilies cost $6HELP ASAP!! PLS MAKE U BRAINLIST!! 4 × [(8 + 12) ÷ 4] =
Answer:
its 20
Step-by-step explanation:
you add 8 + 12 which is 20 then you divide it by 4 which is 5 then you multiply 4 which is 20
The quotient of a number and 6 minus -1/3 is equal to the quotient of the number and 8. What is the number?
Answer:
x = 8
Step-by-step explanation:
Let the number = x
x/6 - 1/3 = x/8
-1/3 = x/8 - x/6
-1/3 = (6x-8x)/48
-1/3 = -2/48x
Divide both sides by -2/48
x = -1/3 ÷ -2/48
= -1/3 × -48/2
= 48/6
= 8
x = 8
The number = 8
need a quick answer please
Answer:
-3, 6
Step-by-step explanation:
This one was on my unit test
please help me on this! thank you!
Answer:
true
equation
equation
expression
Step-by-step explanation:
this is super easy to remember. :)
EQUations have EQUALS
it's that easy :)
What is the value of 4(3d-e)-2f
Answer:
12d-4e-2f
4(3d-e) -2f= 4(3x2-4)-2x3
=4(6-4)-6
=4x2-6
=8-6
=2
Step-by-step explanation:
mark as BRAINLIEST
-7+m=8
m=15
How do I show work for this tho?
Answer:
Use substitution method
-7+(15)=8
8=8
Hope this helps. Have a nice day you amazing bean child.
-7 + 15 = 8
Move the 7 over to the 8, the negative sign becomes a positive.
15 = 7+8
7+8 = 15
15 = 15
Apples cost $2.99 per pund at Natural Grocers. If Landon purchases 3.6 pounds of apples, then how much willnhe spend? Round your answer to the nearest penny.
Answer:
$10.76
Step-by-step explanation:
Just multiply 2.99 by 3.6 and round
Hello! I was wondering if you could help me? It’s 6th grade math. :-)
4th question: 5 boxes of Cheerios cost $17.50
Answer:
1. 72,0:3=2,40
2. 4,50:6=0,75
3. 14,76:12=1,23
4. 17,50:5=3,50
hope it helped :-)
Please helppppppppppp
Answer:
21.92
Step-by-step explanation:
division
87.68 ÷ 4
Answer:
The answer is 21.92
Step-by-step explanation:
87.68 divided by 4
There is 4 people and the total is $87.68
Easy points, what’s 9+10?
Answer:
19
Step-by-step explanation:
Write the equation of a line with a slope of 3 that passes through (-3,2).
Answer:
y = 3x + 11
Step-by-step explanation:
Substitute the information into the point-slope form equation.
Point-slope form: y - y₁ = m(x - x₁)
y - 2 = 3(x - (-3))
y - 2 = 3(x + 3)
y - 2 = 3x + 9
y = 3x + 11
the diameter of a sold spherical ball is 35cm, Find its the surface area and the volume
Answer:52
Step-by-step explanation:
what is the value of X ? show step by step
Answer:
x=20
Step-by-step explanation:
The measure of BCD will be equal to the measures of BAC and ABC added together.
Hope this helps :-)
What angle relationship describes ∠UQR and ∠WRT? segments UV and WZ are parallel with line ST intersecting both at points Q and R respectively Alternate interior angles Alternate exterior angles Corresponding angles Vertical angles
Answer:
Corresponding Angles
Step-by-step explanation:
I got it right on the test ;)
GOOD LUCK!
The angle ∠UQR and angle ∠WRT are the corresponding angles. Then the correct option is C.
What is an angle?The angle is the distance between the intersecting lines or surfaces. The angle is also expressed in degrees. The angle is 360 degrees for one complete spin.
Corresponding angle - If two lines are parallel then the third line. The corresponding angles are equal angles.
The segments UV and WZ are parallel with line ST intersecting both at points Q and R respectively.
Then the angle ∠UQR and angle ∠WRT are the corresponding angles.
Then the angle ∠UQR and angle ∠WRT are congruent to each other.
∠UQR = ∠WRT (corresponding angle)
Then the correct option is C.
More about the angled link is given below.
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36x^3 +27x^2=0 pls help me solve :/
Answer: 36x^3 +27x^2 = 9x^2\left(4x+3\right)
Step-by-step explanation: apply exponent rule rewrite factor out common term plz enjoy
Answer:
[tex]x = 0\; ,-\frac{3}{4}[/tex]
Step-by-step explanation:
[tex]36x^3 + 27x^2 = 0[/tex]
Take 9x² common from the expression on L.H.S.[tex]=> 9x^2(4x + 3) = 0[/tex]
Here, x will have 2 values :-
1) [tex]9x^2(4x + 3) = 0[/tex]
Divide both the sides by (4x + 3)[tex]=> \frac{9x^2(4x + 3)}{(4x+3)} = \frac{0}{4x+3}[/tex]
[tex]=> 9x^2 = 0[/tex]
Divide both the sides by 9x[tex]=> \frac{9x^2}{9x} = \frac{0}{9x}[/tex]
[tex]=> x = 0[/tex]
2) [tex]9x^2(4x + 3) = 0[/tex]
Divide both the sides by 9x²[tex]=> \frac{9x^2(4x + 3)}{9x^2} = \frac{0}{9x^2}[/tex]
[tex]=> 4x+3 = 0[/tex]
Substract both the sides from 3[tex]=> 4x+3 -3 = 0 - 3[/tex]
[tex]=> 4x=-3[/tex]
Divide both the sides by 4[tex]=> \frac{4x}{4} = \frac{-3}{4}[/tex]
[tex]=> x = -\frac{3}{4}[/tex]
1/5 - 1/6
Plz ans. Fasttt
Answer: 1/30
5 and 6 both have a common factor of 30
30 will be our ned denominator
1/5 needs to be multipliued by 6
(since 5 times 6 is 30)
and
1/6 needs top be multiplied by 5
(since 6 times 5 is 30)
then you get 6/30 - 5/30 and that is just 1/30
im confused right now.
Answer:
x = -45
Step-by-step explanation:
There is a rope running from the top of a flagpole to a hook in the ground. The flagpole is 21
feet high, and the hook is 20 feet from its base. How long is the rope?
How many solutions?
y = 5(x – 4)
4x + 12 = -y
Answer:
One solution, x = 8/9
Step-by-step explanation:
One way to solve this is to take one equation and substitute into the other and then solve. So, take y=5(x-4) and put that into the other equation.
4x + 12 = -y
4x + 12 = -(5(x-4)) <--- substitution here
4x + 12 = -5(x-4)
4x + 12 = -5x + 20 <-- simplifying
4x + 5x = 20 - 12
9x = 8
x = 8/9
any answers? im bit stuck on this
Step-by-step explanation:
The vertical angles are congruent. The right angles are congruent. There are 2 angles of a triangle congruent to 2 angles of anther triangle. By AA Similarity the triangles are similar.
Statement A. (vertical angles are congruent)
Statement D. (right angles are congruent)
Triangle AEC is similar to triangle BDC.
Statement E is true but does not help.
Correct statement of proportional side lengths:
BD/AE = CD/CE
x/150 = 200/50
x/150 = 4
x = 600
P.S. I think there is a mistake in the problem. I don't think that statement E is correct. It is a true statement, but it is useless. Statement F is false.
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Answer:
3x+14
Step-by-step explanation:
2(3x+4) -3(x-2)
6x+8 -3(x-2)
6x+8 -3(x-2)
6x+8 -3x+6
6x+8-3x+6
6x+ 14 -3x
6x +14 -3x
3x +14