Answers
Answer:
I think 13 is C
Step-by-step explanation:
71+52= 123
180-123= 57
Related Questions
The solution to a system of linear equations (-3,-3) which system of linear equations has this point as its solution?
Answers
Answer:
[tex]x - 5y =12[/tex] and [tex]3x + 2y =-15[/tex]
Step-by-step explanation:
Given
See attachment
Required
Which options has the solution: [tex](x,y) = (-3,-3)[/tex]
[tex](a)[/tex] [tex]x - 5y =-12[/tex] and [tex]3x + 2y =-15[/tex]
Substitute [tex]x =-3[/tex] and [tex]y = -3[/tex] in [tex]x - 5y =-12[/tex] and [tex]3x + 2y =-15[/tex]
[tex]x - 5y =-12[/tex]
[tex]-3 - 5*-3 = -12[/tex]
[tex]-3 + 15 = -12[/tex]
[tex]12 \ne -12[/tex]
This is not a solution
[tex](b)[/tex] [tex]x - 5y =-12[/tex] and [tex]3x + 2y =15[/tex]
As shown in (a), (-3,-3) is not true for [tex]x - 5y =-12[/tex]
[tex](c)[/tex] [tex]x - 5y =12[/tex] and [tex]3x + 2y =-15[/tex]
Substitute [tex]x =-3[/tex] and [tex]y = -3[/tex] in [tex]x - 5y =12[/tex] and [tex]3x + 2y =-15[/tex]
[tex]x - 5y =12[/tex]
[tex]-3 - 5(-3) = 12[/tex]
[tex]-3 + 15 = 12[/tex]
[tex]12 = 12[/tex]
[tex]3x + 2y =-15[/tex]
[tex]3(-3) + 2(-3) = -15[/tex]
[tex]-9 - 6 = -15[/tex]
[tex]-15 = -15[/tex]
Hence,
(-3,-3) is true for [tex]x - 5y =12[/tex] and [tex]3x + 2y =-15[/tex]
Answer:
C
Step-by-step explanation:
I took the quiz
Look on number 7 and solve
Answers
Answer:
(0, 0), (-3, -1), (-6, -2), and (6, 2)
Step-by-step explanation: just go along the points that intersect in that line that you created UwU (the line should go through the origin (0, 0). get it now?)
Express (x−4)^2 as a trinomial in standard form.
Answers
The first reaction will be a reaction of the iodide ion (I-1) with hydrogen peroxide (H2O2) in an acidic solution. This reaction produces a slightly orange solution. In our experiment, we will add some orange food coloring to make this solution more orange.
2 H+ (aq) + 2 I- (aq) + H2O2 (aq) ⟶ I2 (aq) + 2 H2O (l)
The next reaction will be between the iodine and starch
I2 + starch ⟶ I2-starch complex (blue-black)
So, when starch is added to the iodine solution made from the first reaction, the solution will turn black immediately, so it is difficult to find the rate of reaction. In order to be able to time this reaction, you will slow it down with another reaction. Adding ascorbic acid will react with the iodine, reducing the concentration of the iodine available to react with the starch.
C6H8O6 (aq) + I2 (aq) ⟶ 2I- (aq) + C6H6O6 (aq) + 2 H+ (aq)
When the ascorbic acid is used up, the remaining iodine molecules can react with the starch and form the black color. The more ascorbic acid you add, the slower the reaction to form the iodine-starch complex will be.
1. What was your hypothesis?
2. Plot your data as drops of ascorbic acid vs. time.
3. As the concentration of ascorbic acid was increased, did the rate of the formation of the iodine-starch complex increase or decrease? Explain your answer in terms of the chemical reactions involved.
4. Was your hypothesis correct?
5. Make a general rule about the effects of concentration of reactants on reaction rates.
6. For practice, the molecular formula for ascorbic acid is C6H8O6, and you used 6 g in this experiment, calculate the molarity of the ascorbic acid. Now calculate the concentration in moles per drop (assume 1 mL = 20 drops).
Answers
Answer:
hello ! i just did this project and received a 100,, so here you are ::
1. I hypothesize that if you continue to add more drops, then the time it takes will continue to increase.
2. A; 9.70 secs, B; 14.63 secs, C; 18.78 secs, D; 28.70 secs, E; 31.45 secs.
3. The formation continued to increased. As more was added, the time it took to reach the full reaction was increased.
4. Yes.
5. When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases. When the concentration of a reactant decreases, there are fewer of that molecule or ion present, and the rate of reaction decreases.
6. 6mL.
Step-by-step explanation:
for this one it was simple, they are only asking you what you think will happen to the time if they increase the number of drops. remember to use the "if....then..." format.i recorded the container labeled and the time it took for the solution to turn black. they are asking the same thing that they are for the hypothesis but this time after watching the video you know what actually happens. in this case, the more drops you put in the longer it takes for it to react. write this one down without the if then format.for mine, i got it correct but you can put yours wrong on purpose if youd like.i looked this one up, but it makes sense. this is correct, so dont worry.like i said,, i go this correct so dw ! <3
The rate of reaction depends on the slow step of a reaction.
A hypothesis is a tentative explanation of an observation. This question refers to an experiment so I will try to explain as much as possible. We can see that the rate of reaction is determined by the concentration of the ascorbic acid.
Hence, we can assert that, the more the concentration of the ascorbic acid, the lower the rate of reaction. The rate of reaction depends on the slow step of a reaction.
We know that the molar mass of ascorbic acid is 176 g/mol. The mass of ascorbic acid is 6 g. Hence;
Number of moles of ascorbic acid = 6 g/176 g/mol = 0.034 moles
concentration of ascorbic acid = 0.034 moles/20 × 1 × 10-3 = 1.7 M
Learn more about ascorbic acid: https://brainly.com/question/24809886
6,10,14,...
Find the 30th term.
Answers
Answer:
6,10,14,...
Find the 30th term.
18,22,26,30
Explanation:
+4 each time?
Suppose the commute times for employees of a large company follow a
normal distribution. If the mean time is 24 minutes and the standard
deviation is 5 minutes, 95% of the employees will have a travel time within
which range?
A. 9 minutes to 39 minutes
B. 19.25 minutes to 28.75 minutes
C. 14 minutes to 34 minutes
D. 19 minutes to 29 minutes
Answers
Answer:
C is the answer.
Step-by-step explanation:
i just got it right so that means you would too> let's goooo!!
The employees will have to travel within 19.25 minutes to 28.75 minutes.
What is Normal Distribution?'Normal distribution is a continuous probability distribution wherein values lie in a symmetrical fashion mostly situated around the mean.'
According to the given problem,
Mean time = 24 minutes
Standard deviation = 5 minutes
Therefore,
⇒24 + 5 = 29
⇒24 - 5 = 19
Now,
(29 - 19) * 95% = 9.5
Hence, we can conclude that 95% of the employees will have to travel within 19.25 minutes to 28.75 minutes.
Learn more about normal distribution here:
https://brainly.in/question/8877034
#SPJ2
Kelli cut away 3.34 meters of rope before that she had 9 meters of rope how much rope does Kelko has
Answers
Answer:
5.66
Step-by-step explanation:
Kelli cut away 3.34 meters of rope before that she had 9 meters of rope how much rope does Kelko has
9 − 3.34
= 5.66
factorise 8x^2 + 10x + 3
Answers
Answer:
Step-by-step explanation:
so 8^2 +10x+3 (if you times 8*3 -gives you 24)
the middle number is 10X right so then you have to guess two numbers that either add up or take away to make it a positive 10.
so example if i try 5+5 it gives me 10 but it i multiply 5 by 5 -it gives 25 therefore lets try another pair of numbers.
i chose 6 and 4 because when i add them it gives me 10 and when i multiply them, it gives me 24.
therefore im just going to:
8x^2+6x+4x+3
to factorise im going to use 2x
2x(4x+3) + 1(4x+3)
so my answer is (2x+1) and (4x+3)
I really need help asapppppp
Answers
Answer:
5 cups
Step-by-step explanation:
3.75 x 1 1/3
Answer:
5 cups!
Step-by-step explanation:
well, first start off with the whole numbers. then move onto fractions and add it up. they need common denominators!
what is the answer to this:
4 + c, when c = 10
Answers
Answer:
14
Step-by-step explanation:
4+10=14
Answer:
14
Step-by-step explanation:
4+c
4+(10)=14
A soda company is filling bottles of soda from a tank that contains 500 gallons of soda. At most, how many 20-ounce bottles can be filled from the tank?
(1 gallon = 128 ounces)
A
25
B
78
C
2,560
D
3,200
Answers
Step-by-step explanation:
the answer C
hope this helps bro
and if u need work shown lemme know
What is the value for the variable?
9⁴ · 9⁻⁶ = 9ᵇ
Answers
A box contains 5 chocolate chip cookies, 4 sugar and 6 oatmeal raisin. What is the probability of picking a chocolate chip cookie?
A) 1/9
B) 1/3
C)2/21
D) 2/3
Answers
Answer:
b
Step-by-step explanation:
the chocolate chip cookies are 5/15 and the equavilent is 1/3
what is the standard form of the equation y+6=2(x-3)
Answers
Answer:
Step-by-step explanation:
Y+6=2x-6
6+6=2x-y
12=2x-y
2(x+5)=1/2(x-4)
Step by step
Answers
[tex]\text {Hello! Let's Solve this Problem!}[/tex]
[tex]\text {\underline {The First Step is to Simplify}}[/tex]
[tex]\text {2*x=2x}\\\text {2*5=10}\\\text {1/2*x=1/2x}\\\text {1/2*-4=-2}[/tex]
[tex]\text {Your New Problem Is: 2x+10=1/2x-2}[/tex]
[tex]\text {\underline {The Next Step is to Subtract 1/2x}}[/tex]
[tex]\text {2x+10-1/2x=1/2x-2-1/2x}[/tex]
[tex]\text {Your New Problem Is: 3/2x+10=-2}[/tex]
[tex]\text {\underline {The Next Step is to Subtract 10}}[/tex]
[tex]\text {3/2x+10-10=-2-10}[/tex]
[tex]\text {Your Final Problem Is: 3/2x-12}[/tex]
[tex]\text {\underline {The Final Step is to Multiply 2/3}}[/tex]
[tex]\text {2/3*3/2x=2/3*-12}[/tex]
[tex]\text {Your Answer Would Be:}[/tex]
[tex]\Huge\boxed {x=-8}[/tex]
[tex]\text {Best of Luck!}[/tex]
[tex] \huge\bf \underline{Solution:-}[/tex]
[tex]2(x + 5) = \frac{1}{2} (x - 4)[/tex]
[tex]⇒2x + 10 = \frac{x}{2} - \frac{4}{2} [/tex]
[tex]⇒2x - \frac{x}{2} = - \frac{4}{2} - 10[/tex]
[tex]⇒ \frac{4x - x}{2} = - 2 - 10[/tex]
[tex]⇒ \frac{3x}{2} = - 12[/tex]
[tex]⇒3x = - 24[/tex]
[tex]⇒x = - \frac{ 24}{3} [/tex]
[tex]⇒x = - 8[/tex]
[tex] \\ [/tex]
[tex] \sf \underline{Now, \: we \: are \: gonna \: do \: correction \: test :-} [/tex]
[tex]L.H.S. = 2 (x + 5) [/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2( - 8 + 5)[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2 \times ( - 3)[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = - 6[/tex]
[tex]R.H.S = \frac{1}{2} (x - 4)[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1}{2} ( - 8 - 4)[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1}{2} \times ( - 12)[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = - 6[/tex]
[tex] \bold{ \therefore{L.H.S = R.H.S}}[/tex]
[tex] \sf \red{Hence, \: the \: value \: of \: x \: is \: - 8. }[/tex]
Geoff earns 10% commission on his total sales at work..To pay for a concert ticket, Geoff needs to earn $135 in commission. What must Geoff's sales total for the week?
Answers
Answer:
$1350
Step-by-step explanation:
Percentage commision earned = 10%
Amount needed to pay for concert = $135
Hence, total sales for the week must be :
Let total sales = x
10% of total sales = $135
10/ 100 * x = $135
0.1x = $135
x = $135 / 0.1
x = $1350
a function ,f, is defined by the set {(2,3), (4,7), (-1,5)}. if f is reflected in the line y=x, which point will be in the reflection?
a. (5,-1) b. (-5,1) c. (1,-5) d. (-1,5)
Answers
Answer:
the answer is d
Step-by-step explanation:
please help. i don't have much time
Answers
Answer:
give me brainliest
Step-by-step explanation:
51 divided by 60 times 100 = 85%
Answer:
85%
Step-by-step explanation:
51/60*100 = 85%
1. In Kite ABCD below, point E is the midpoint of segment BD. What are the
coordinates of point D?"
O A. (22,4)
O B. (4,4)
O C. (-16,4)
O D. (4.16)
Answers
Answer:
The coordinates of point D( 4,4)
Step-by-step explanation:
Step(i):-
Given points are E(10,4) and B(16,4)
'E' is the mid-point of segment BD
Let D(x₁, y₁) be a point
E = midpoint of segment BD
[tex](10,4) = (\frac{x_{1} +x_{2} }{2} , \frac{y_{1} +y_{2} }{2} )[/tex]
[tex]10 = \frac{x_{1} +16 }{2}[/tex]
20 = x₁ + 16
20-16 = x₁
x₁ =4
Step(ii):-
[tex]\frac{y_{1} +y_{2} }{2} = 4[/tex]
[tex]\frac{4 +y_{2} }{2} = 4[/tex]
4 + y₂ = 8
y₂ = 8-4 =4
The co-ordinates of point D( 4,4)
Which value is equivalent to
1 17/2”
Answers
Answer:
19/2 or 9.5 or 9 1/2
Step-by-step explanation:
These are equal to 1 17/2
can someone help me with school
Answers
??? ??? I was also looking for the answer
Find the distance between Riverside and Milton if they are 15 cm apart on a map with a scale of 4 cm: 21 km.
pls answer i will give points
Answers
Answer:
66.9375
Step-by-step explanation:
from what you told me 4cm=21km
if you divide 21 by four, you get how many km is one cm. which is 5.25km
15 divided by 4 = 3.75
what we know is that 4 can go into 15 three whole times. so.. 21x3=63
now what we need to figure out is that .75
so, 75 is three quarters, so i divided 5.25 divided by 4 to get how much one quarter of a cm is in km. then i multipled that by three, giving me: 3.9375
63+3.9375= 66.9375
but you might have to round this i dont know if you do or not so thats the answer im giving
don't have any more points but I REALLY NEED THIS QUESTION DONE
Answers
I believe that the answer is 25.
Answer:
38
Step-by-step explanation:
Because ST is midsegment the half of DG
so' 19×2 = 38BRAINILIEST PLEASE
Madison purchased 240 ft of fencing to build a corral for her horses. If each horse requires 600 ft2 of space, what is the maximum number of horses Madison can put in
the corral she builds with the fencing? Explain.
Answers
Answer:
6 horses
Step-by-step explanation:
2(x + y) ≤ 240
side lengths with greatest area = x = 120/2 and y = 120/2
60 × 60 = 3600ft²
3600/600 = 6 horses
Please Rate and Mark as Brainliest!
The required maximum number of horses is 7.
Given that,
Madison purchased 240 ft of fencing to build a corral for her horses. If each horse requires 600 ft2 of space, what is the maximum number of horses Madison can put in the corral she builds with the fencing is to be determined.
In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,
Here,
Madison has 240 ft of fencing,
Circumference of corral = 240 ft
2πr = 240
r = 38.2
Now the area of the circular corral,
= πr²
= 4584.33
Now, the number of horses,
= total area of corral/area for each horse
= 4584.33 / 600
= 7.64
≈ 7
Thus, the required maximum number of horses is 7.
Learn more about arithmetic here:
brainly.com/question/14753192
#SPJ2
The area of a right triangle is 270 square meters. The height of the right triangle is 15 meters. What is the length of the hypotenuse of the right triangle?
Answers
Answer:
[tex]\sqrt{549}[/tex] ≈ 23.4
Step-by-step explanation:
A = bh
270 = 15b
b = 18
Now you know the two legs, use the Pythagorean Theorem to find the value of the hypotenuse: a² + b² = c²
15² + 18² = c²
225 + 324 = c²
c² = 549
c = √549
A cone has a height of 20 millimeters and a radius of 8 millimeters. What is its volume?
Use r = 3.14 and round your answer to the nearest hundredth.
Answers
Answer:
Step-by-step explanation:
the volume of the cone:
V=3.14*r^2*(h/3)
V=3.14*8*8*(20/3)=200.96*(20/3)=1339.73
Answer:
Step-by-step explanation:
volume of cone =1/3 πr²h=1/3×π×8²×20=1280/3 π mm³
=1280/3×3.14
≈1339.73 mm³
helpppppppppppppppppppppp
Answers
Answer:
I can only help with a, witch is -3x
Step-by-step explanation:
im sorry i cant help with b, that one i cant even figure out, and im usually pretty good with math
i hope i helped you out a little bit at least
Help me plsssssssssssssssssssssssssss
Answers
Answer: 120
Step-by-step explanation: divide 24 by 5 to get 4.8 so its 4.8 minutes for one question
25 x 4.8 = 120
2.9y=11.6 what does y equal?
Answers
Answer:
4
Step-by-step explanation:
448 math problems for homework or 28 days. If she solved the same number of problems each day, how many problems did she solve per day? Please answer
Answers
Answer:
16
Step-by-step explanation:
448/28=16
if she did the work sheet for 28 days she answered 16 questions per day .
Answer:
it is 16
Step-by-step explanation:
448 ÷ 28 = 16 or 16×28=448
