Sharon completed the proof below. Which statement about Sharon’s proof is true
Answer:
1
Step-by-step explanation:
If it's given then it must be true
Mary is one year older than june, and the age add up to 15 from a pair of equation and solve them to find the ages of the girls.
Answer:
14 is the answer of your question
NEED ANSWER FAST PLASE FAST
Answer:
D. no solution
Step-by-step explanation:
h-z=3(1)
h=3+z(minus z from both side)
put in the second equation
-3h,+3z=6(2)
-3(3+z)+3z=6
-9-3z+3z=6
-9=6( not true)
so the equation doesn't have a solution.
2. The pool maintenance man forgot to bring his logarithmic charts, and he needs to raise
the amount of hydronium ions, t, in the pool by 0 45. To do this, he can use the graph you created
Use your graph to find the pH level if the amount of hydronium ions is raised to
0.45
b. Then, convert the logarithmic function into an exponential function using y for the рН.
I’m so lost and don’t know what to do someone please help.
Answer:
hey have made this a little more confusing than it has to be. Usually we use H+ in chemistry instead of t, but you can also use X, Y if it's easier where Y = -log(X) where X= hydronium and Y = pH.
Which also means Y=p(t) and X = t.
To graph this, I would suggest using values for X like 0.1, 0.2, 0.5, 0.7, 1.0, 1.5, or similar numbers. Then use your calculator to calculate Y values for each of these X values and plot them. You can also use a spreadsheet. If you have Excel I can help you to use it. Either way you can then use your graph to answer the questions in part 1 where Y = 0 and Y=1 and just read off the X values.
Part 2 is worded badly. It's ambiguous to say "raised by 0.5" since if you raise hydronium (= X) by 0.5, the change in pH (=Y) will vary depending on where you start. They meant "raise to 0.5", though they do say this at the end of the question. Anyway, you can easily read it off your graph using 0.5 as the X value.
Now to set up the exponential function this is much easier than it sounds. Just remember that a logarithm is the inverse of an exponent so they cancel each other out: As an example log(10X) = X.
So applying here, just take this equation Y = -log(X) and raise 10 to both sides of the equation:
10Y = 10-log(X) which gives you 10Y = 1/X or more usefully X = 10-Y where again X= hydronium and Y = pH
Part 3, these questions actually have no relationship to anything in chemical reality, but are just exercises to see if you can manipulate the graph and function. But they do illustrate at least one interesting point. Note that in the equation
X = 10-Y
X can never =0. This makes sense since there is nothing you can raise 10 to that will make it zero. It also makes sense chemically since in water you can never have zero hydronium. Similarly using the other form
Y = -log(X)
You know X can also never be zero since you can't have log(0).
Now when they ask for a "Y intercept" they are asking for when X=0 which as stated is never in the above case. However when you transform the equation the ways they want you to, then maybe sometimes you can:
So for p(t) + 1 that really means Y = -log(x) + 1. Still here you can not have a Y intercept (X can't =0) since you would still have log(0) which is forbidden.
But p(t+1) really means Y = -log(X+1). Here of course X can be zero since that just gives you log(1). So you have a Y-intercept.
I'll leave it for you to figure out the third one, the question being if you set X=0, will you get log(0)? If so, that's forbidden. If not, you will have a Y intercept.
What is the vertex of y = x2 + 2x +2
O (1,-1)
O (2,-2)
O (1, 2)
0 (-1, 1)
Answer:
vertex = (- 1, 1 )
Step-by-step explanation:
Given a parabola in standard form
y = ax² + bx + c ( a ≠ 0 )
Then the x- coordinate of the vertex is
x = - [tex]\frac{b}{2a}[/tex]
y = x² + 2x + 2 ← is in standard form
with a = 1 and b = 2 , then
x = - [tex]\frac{2}{2}[/tex] = - 1
substitute x = - 1 into the equation for y- coordinate of vertex
y = (- 1)² + 2(- 1) + 2 = 1 - 2 + 2 = 1
vertex = (- 1, 1 )
What's the definition of a ratio
Answer:
the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
Step-by-step explanation:
Pls help, show work! Thank you
Answer:
126 miles
Step-by-step explanation:
1/4 inches = 9 miles
Divide 3.5 by 1/4 or 0.25
3.5 ÷ 0.25 = 14
Multiply 14 by 9
14 x 9 = 126
126 miles
Math Word Problem:
If I need to achieve 345,000 diamonds in 15 days in a game. How many times do I need to sleep to achieve that goal. Every time you sleep you earn 100 XP, to level up do you need 325 XP, once you level up you get 1800 diamonds.
Answer:
624 times
Step-by-step explanation:
345000/1800=191 2/3, but you can't level up 2/3 of a time, so you round up to 192. Then, you do 192*3.25, because you need to sleep 3 times and then use 1/4 of the XP from the 4th time. This gets you 624
If a cheetah can run 68 mph, how fast is he in feet per second?
Answer:
The cheetah can reach speeds of up to 100.70 feet per second in short bursts.
What is the distance from X to Y?
Answer:
15
Step-by-step explanation:
distance formula
[tex]\sqrt{((x2-x1)^2 + (y2-y1)^2)}[/tex]
[tex]\sqrt{(9-0)^2 + (-6-6)^2}[/tex]
[tex]\sqrt{81 + 144}[/tex]
[tex]\sqrt{225}[/tex]
15
10th grade geometry ASAP PLZ HELP
Please answer this.
Answer:missing angle = 42, x=10
Step-by-step explanation: to find the missing angle, we need to subtract 48 from 90, because it is a right angle. 90-48=42.
therefore, 3x+12=42
3x=42-12
3x=30
X=30/3
x=10
Solve for x
Please explain step by step
Answer:
x=16Step-by-step explanation:
Since RQTS is a parallelogram
[tex]\angle Q +\angle T=180^{o}[/tex]
[tex]3x+5+9x-17=180^o[/tex]
[tex]12x-12=180^o[/tex]
[tex]12x-12+12=180+12[/tex]
[tex]12x=192[/tex]
[tex]\cfrac{12x}{12}=\cfrac{192}{12}[/tex]
[tex]x=16[/tex]
Hope it helps!
Find the roots of the factored polynomial.
(x - 5)(x + 2)
Write your answer as a list of values separated by commas.
X =
Answer:
roots are 5, -2
Step-by-step explanation:
set each factor equal to zero and solve:
x - 5 = 0
x = 5
x + 2 = 0
x = -2
Answer:
x = 5, -2
Step-by-step explanation:
(x - 5)(x + 2) = 0
Using the 0 product property:
Case 1
x - 5 = 0x = 5Case 2
x + 2= 0x = -2The roots are [tex]\boxed{5, -2}[/tex]
-Chetan K
here how about this one
Answer:
215.6
Step-by-step explanation:
just subtract 400.8-185.2 to get width
Answer:
15.2
Step-by-step explanation:
We know the formula to find the perimeter of a rectangle is 2(w + l) or 2w + 2l (in this case we'll use 2w + 2l). We are given the length as 185.2. Next, we multiply 185.2 by 2 (or add twice) to get 370.4. Then, we subtract 370.4 from 400.8 to get 30.4. Lastly, we split 30.4 in half to get 15.2 meters.
Have a lovely rest of your day/night, and good luck on your assignment! ♡
PLEASE HELP!!!!!
In 2012 a home was purchased for $185,000. It is expected that the home will increase in value 1.5% each year over the next 30 years. What is the home's value in 2030?
(leave answer in terms of money)
Answer:
$289,169.84 (to the nearest cent)
Step-by-step explanation:
Compound interest is based on the principal amount and the interest that accumulates on it in every period.
Compound Interest = P (1 + r)^n
where P = principal amount, r = annual interest rate (as a decimal), n = term, in years
So for this problem:
P = 185000
r = 1.4 ÷ 100 = 0.015
n = 30
Therefore,
Compound Interest = P (1 + r)^n
= 185000 x (1 + 0.015)^30
= 185000 x (1.015)^30
= 289169.8408...
= $289,169.84 (to the nearest cent)
A car stereo is on sale for $250 from its original $273 cost. What is the percentage of the discount?
well, from 273 to 250 is 23 bucks, so that's the difference.
we know 273 is the original price, or namely the 100%, so what's 23 bucks off of it in percentage?
[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 273&100\\ 23&x \end{array}\implies \cfrac{273}{23}=\cfrac{100}{x}\implies \implies 273x=2300 \\\\\\ x=\cfrac{2300}{273}\implies x\approx 8.42[/tex]
An algebra configuration where the largest tile is labeled negative x squared, 3 tiles are labeled plus x, where each tile is half the size of the largest tile, and 4 tiles labeled minus that are one-quarter the size of the largest tile. Which polynomial represents the algebra tile configuration shown? x2 3x 4 x2 3x − 4x −x2 − 7 −x2 3x − 4.
A polynomial equation is the equation in which the unknown variable is one and the highest power of the unknown variable is n.
The polynomial equation for the given algebra tile is,
[tex]-x^2+3x-4[/tex]
Hence the option 4 is the correct option.
What is polynomial equation?A polynomial equation is the equation in which the unknown variable is one and the highest power of the unknown variable is n.
Here, n is any real number.
.
Given information-
The largest tile is labeled negative x squared.
Total 3 tiles are labeled plus x, in which, each tile is half the size of the largest tile.
Total 4 tiles labeled minus that are one-quarter the size of the largest tile.
As the largest tile is labeled negative x squared, therefore the size of largest tile is [tex]-x^2[/tex].
The total 3 tiles are labeled plus x, in which, each tile is half the size of the largest tile and there is total 4 tiles labeled minus that are one-quarter the size of the largest tile.
The image shown below for the algebra tile.
Thus the polynomial equation for the given algebra tile is,
[tex]-x^2+3x-4[/tex]
Hence the option 4 is the correct option.
Learn more about the polynomial equation here;
https://brainly.com/question/2833285
Answer:
To make it easier the answer is D..
Step-by-step explanation:
A rectangular room has a n actual length of 6 meters and a width of 4 meters. The scale for a drawing is 1 cm = 2 meters. What is the length and width of the scale drawing?
Length = 12 cm, Width = 8 cm A
Length = 4 cm, Width = 2 cm B
Length = 8 cm, Width = 6 cm.C
Length = 3 cm, Width = 2 cm D
Answer:
the answer is this seems to be a trick question because you have to divide 6 meters by two to get 3 cm and the four also gets divided by 2 cm and that is how i got the aanswer d
Step-by-step explanation:
Maribel was working at the fruit stand and had to find how much change to give a customer. The customer bought 11 oranges at $0. 65 each and paid with a $10 bill. Use c to represent the amount of change and choose the correct equation.
Answer:
A) 11(0.65)+c=10
Step-by-step explanation:
Step 1: Calculate the price of 11 oranges at $0.65 each.
11 × 0.65 = $7.15
Step 2: Consider the constraint: if Maribel only has a $10 bill, we have to deduct $7.15 from $10 to find our answer:
$10.00 - $7.15 = $2.85
Step 3: Write an equation based on our solution:
C = 10-0.65x ; Where:
* 10- indicates that we start with $10, and subtract from there.
* C is the amount of change per purchase.
* X is the number of oranges a customer buys.
Answers:
1. The customer receives $2.85 in change.
2. Given a case where a customer pays with one 10-dollar bill, their purchase amount can be calculated with C = 10-0.65x
I hope this helped! Have a great day.
find the value of m and n
Answer:
m = 36
n = 3
Step-by-step explanation:
y varies inversely with x can be written as y ≅ 1/x. As x goes up, y will go down. We need a factor, N, to account for how much change occurs with each step. There needs to be a factor involved, F, to account for how much change occurs with each step.
Calculate the factor by using one of the known points. I'll use (8,9):
y = F/x
9 = F/8
F = 72
The relation becomes y = 72/x. Check this on the other given point, (12,6):
y = 72/x
6 = 72/12 ? YES
Now use y = 72/x to find the two missing points, (m,2) and (24,n):
(m,2) 2 = 72/m, m = 36
(24,n) n = 72/24; n = 3
The difference in the total number of calories in a jar of peanut butter and a jar of jelly is 3,545. The sandwich that Julio made contained a total of 430 calories from the peanut butter and jelly alone, which was StartFraction 2 Over 23 EndFraction of the jar of peanut butter and StartFraction 2 Over 33 EndFraction of the jar of jelly. Which system of equations can be used to determine the total number of calories in the jar of peanut butter, x, and the total number of calories in the jar of jelly, y? x minus y = 3545 and StartFraction 2 Over 23 EndFraction x StartFraction 2 Over 33 EndFraction y = 430 x minus y = 3,545 and StartFraction 2 Over 33 EndFraction x StartFraction 2 Over 23 EndFraction y = 430 x y = 3,545 and StartFraction 2 Over 23 EndFraction x StartFraction 2 Over 33 EndFraction y = 430 x y = 3,545 and StartFraction 2 Over 33 EndFraction x StartFraction 2 Over 23 EndFraction y = 430.
Answer:
the total number of calories in the jar of peanut butter, x, and the total number of calories in the jar of jelly, y
The difference in the total number of calories in a jar of peanut butter and a jar of jelly is 3,545
Now we use total calories ,which was 2/23 of the jar of peanut butter and 2/33 of the jar of jelly
x minus y = 3545 and StartFraction 2 Over 23 EndFraction x + StartFraction 2 Over 33 EndFraction y = 430
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
I think it is I'm very sorry if it's wrong :)
What is equivalent expression of (6 + 7) x?
Answer:
7x+6x
Step-by-step explanation:
Distributive property. 7 times x = 7x. 6 times x = 6x
In how many ways can we choose one number from the set $\{1,2,3\}$, one number from the set $\{4,5,6\}$, and one number from the set $\{7,8,9\}$ such that the three could be the sides of a nondegenerate triangle
Using triangle concepts, it is found that there are 3 ways to choose a number from each set such that the three could be the sides of a nondegenerate triangle.
What is the condition for 3 lengths to represent a triangle?In a triangle, the sum of the lengths of the two smaller sides has to be greater than the length of the greater side.
In this problem, the possible lengths are:
2, 6 and 7.3, 5 and 7.3, 6 and 8.Hence, there are 3 ways to choose a number from each set such that the three could be the sides of a nondegenerate triangle.
You can learn more about triangle concepts at https://brainly.com/question/25645873
Which equations are equivalent to ? Check all that apply. X 4 = 64 60 = x.
You can use the fact that equivalent equations are such that one equation can be obtained by performing some operations(which doesn't break equality) on the other equation and vice versa.
The equivalent equation to [tex]x + 4 = 64[/tex] is [tex]x = 60[/tex]
What are equivalent equations?Equivalent equations are such that one equation can be obtained by performing some operations(which doesn't break equality) on the other equation and vice versa.
How to get the equivalent equation of the given equation?The given equation is
[tex]x + 4 = 64[/tex]
Subtracting 4 from both sides, we get
[tex]x + 4 - 4 = 64 - 4\\x = 60[/tex]
Thus, one equivalent equation to the given equation is [tex]x = 60[/tex]
The equivalent equation to [tex]x + 4 = 64[/tex] is [tex]x = 60[/tex]
Learn more cases of equivalent equations here:
https://brainly.com/question/14332869
What is X equal to?
Urgent! Middle school work
Answer:
x = 12
Step-by-step explanation:
42 + 4x = 90 ( as it is right angle)
transpose to find x
4x = 90 - 42
4x = 48
x = 48/4
x = 12
Answer:
x=12
Step-by-step explanation:
90-42=48 48/4=12
the amount of money m a woman makes per week varies directly with the number of hours h she works per week. if she works 30 hours and earns $145, how much does she make if she works 45 hours?
Answer:
If she works 45 hours she makes $217.5.
Step-by-step explanation:
30. = 45
145. x
30x= 45×145
30x = 6,525
30. 30
x = $217.5
You have a party at your house. mAfter the party, you have 0.50.5 liters of juice remaining. How many milliliters of juice do you have remaining?
Answer:
A liter is 1000 mL so half of 1000 = 500
500 mL is the answer!Step-by-step explanation:
Lilly has 45585 dollars and want to split it with her dad larry, but clemetime and her friend lee, also wants some, and so does kenny and his wife katjaa and there son duck, Carley and doug hear about it and also wants some, How will lilly split the 45585 between her friends?
to evenly split it and Lilly still gets some divide by 9
every one gets 5,069 dollars
or she could ignore those greedy peeps and just share with her dad and get 22,792.50 dollars
i need help quick it is too hard for me to answer
