Answer: 12
Step-by-step explanation:
The time,
T
(seconds), it takes for a pot of water to boil is proportional to the amount,
A
(litres), of water.
It takes 180 seconds to boil 2.8 litres of water.
Work out how long it takes (to the nearest second) to boil 2.2 litres.
Answer:
The time it takes to boil 2.2 litres of water is approximately 141 seconds
Step-by-step explanation:
The given parameters are;
The relationship of the variables, T and A is a proportional, therefore, we have;
T ∝ A, or T/A = k = Constant of proportionality
The time it takes to boil 2.8 liters of water = 180 seconds
∴ When A = 2.8 litres, T = 180 seconds, from which we have;
k = T/A = 180 s/(2.8 L) = 450/7 s/L
k = 450/7 s/L
When A = 2.2 litres, we have;
T/A = k
∴ T = k × A
Plugging in the value for both 'k', and 'A' when A = 2.2 litres, gives;
T = k × A = 450/7 s/L × 2.2 L = 990/7 s = 141.[tex]\overline{428571}[/tex] s
The time it takes to boil 2.2 litres of water, given a direct proportionality relation is, T = 141.[tex]\overline{428571}[/tex] seconds ≈ 141 seconds given to the nearest second.
Which points are reflections of each other across both axes? (-2, 8)and(2, -8) (-7, -1)and(-7, 1) (5, -6)and(-5, -6) (4, -3)and (-3, 4)
if 3 boys build a snow manin 24 minutes how many can 9 finish building in 1 hour
Answer:
what does "manin" mean I can help i just need to know what that word means
i get ur question now! :)
so in 72 minutes 9 kids can make 8 snowman's
Hope this helps u and A LOT! :)
Step-by-step explanation:
Answer:
The answer is 6.
Can somebody help??....
Choose the expression that represents a quadratic expression.
O 6x4 - 5x3 + 3x2 -7x - 8
) 5x3 + 3x2 -7x - 8
O 2x2 + 3x - 1
. 3x - 1
Answer:
3) 2[tex]x^{2}[/tex] + 3x - 1
Step-by-step explanation:
A quadratic expression is an expression involving a squared term
It can be written as y = a[tex]x^{2}[/tex] + bx + c, where a ≠ 0
// note that here b and c can be equal to 0
1) 6[tex]x^{4}[/tex] - 5[tex]x^{3}[/tex] + 3[tex]x^{2}[/tex] - 7x - 8 is simply incorrect because you can't write in the previously mentioned form. It is a quartic function, since the unknown variable x in forth degree. It can be written as y = a[tex]x^{4}[/tex] +b[tex]x^{3}[/tex] +c[tex]x^{2}[/tex] + dx + e, where a before [tex]x^{4}[/tex] ≠ 0
2) 5[tex]x^{3}[/tex] + 3[tex]x^{2}[/tex] - 7x - 8 is simply incorrect because you can't write in the previously mentioned form. It is a cubic function, since the unknown variable x in third degree.
3) 2[tex]x^{2}[/tex] + 3x - 1 is correct
4) 3x - 1 is incorrect because there is no squared term. You could also say that here a = 0 and write it as y = 0 * [tex]x^{2}[/tex] + 3x - 1. It is also called a linear function because if you'd draw a graph, it would be a line
Answer:
2x2 + 3x - 1
Step-by-step explanation:
please help!
Megan has a bag with 8 red cubes, 3 yellow cubes, and 5 green cubes. What is the probability she will pick a red cube, keep it, and then pick another red cube?
Answer:
1st time: 50% chance or 8/16 chance
2nd time: 46% chance or 7/15
I can try again if its wrong
Answer:
7/30
Step-by-step explanation:
8/16 that she picks a red cube.
7/15 that she picks another red cube after keeping the first red cube.
multiply 8/16 (1/2) times 7/15 to get 7/30 as your final answer
I NEED THE NOE HURRY!!!!!!! i will mark u Brainliest
At most, Kyle can spend $50 on sandwiches and chips for a picnic. He already bought chips for $6 and will buy sandwiches that cost $4 each. Write and solve an inequality to show how many sandwiches he can buy. Use s to represent the number of sandwiches. Write your final answer in a complete sentence.
Three numbers are in the ratio 3:9:10. If 10 is added to the last number, then the three numbers form an arithmetic progression. What are the three numbers?
Answer: 6,18,60
Step-by-step explanation:
Don't really know tbh
Answer:
6, 18, 20
Step-by-step explanation:
your welcome
WILL GIVE BRAINIEST!!! IF UR ANSWER IS RIGHT
Answer:
-1
Step-by-step explanation:
the slope of this one is y=x-21
in order for it to be perpendicular the sign changes and the slope flips
but because the slope is 1 you just change the slope to -1
hey can someone please confirm my answer? i got D but it was a guess because i’m not confident in my graphing skills yet
Answer:
the answer is d
Step-by-step explanation:
Find the 12th term given the arithmetic sequence: an = -5n +32
Step-by-step explanation:
step 1. a12 = -5(12) + 32
step 2. a12 = -60 + 32
step 3. a12 = -28.
Please, help me out <3
Answer:
D
Step-by-step explanation:
Every input can only have one output for it to be considered a function. There are repeats of x values with different y values in all of these except for D so D is the correct answer.
PLEASE HELP!! ASAP WILL GIVE BRAIN!! AFTER SOLVING QUESTION, GIVE THE REASON(SSS
SAS
ASA
AAS)
last option:-
∆HOG is congruent to ∆ATCReason:- ASA
Hope it helps ⭐⭐⭐Select two ratios that are equivalent to 8:20
Answer:
The answer is B, C, and D
Step-by-step explanation:
If you simplify each of those ratios, they'll be equivalent
Answer:
B and C
Step-by-step explanation
The first one is B because 2/8 is 4 and 10/20 is 10
The second one is C because 8x3 is 24 and 20x3 is 60
My teacher always says everything you do to one side you have to do to the other :)
Hope this helps! :D
I need help with math if you don't know the answer get out of the question and don't answer it and give the wrong answer or some link or even say "I don't know" or anything like that it's not fair to me cause it a waste of my points I will report your if you do that :) have a nice day and stay safe
Answer:
13 1/3 pounds
Step-by-step explanation:
Hi! Each bad weighs 2 2/3 pounds. There were 5 bags bought so we multiply. Here is the expression:
2 2/3 x 5 = x
Now we need to convert 2 2/3 into an improper fraction, which is 8/3.
Easy! Now
8 5 40
- x - = -
3 1 3
*I tried to set it up like fractions.*
Simplify 40/3 and you get 13 1/3
substitution method
a=-b+5
2b+a=11
Answer:
a = -1
b = 6
Step-by-step explanation:
a = -b + 5
2b + a = 11
2b + a = 11
2b + (-b + 5) = 11
2b - b + 5 = 11
b + 5 = 11
b = 11 - 5
b = 6
2b + a = 11
2(6) + a = 11
12 + a = 11
a = 11 - 12
a = -1
A tank that holds up 10 gallons. when its active, a drain empties water from the tank at a constant rate, when Jada first see the tank, it contains 7 gallons of water. three minute later the tank contains five gallons of water.
At what constant/rate is the amount of water changing in the tank?
Answer:
-2/3 gallon/minute
Step-by-step explanation:
In three minutes the water volume has decreased by 2 gallons (7 less 5 is 2). The unit rate of decrease of the amount of water in the tank is thus:
- 2 gallons
------------------- = -2/3 gallon/minute
3 minutes
Is the point \displaystyle (1,2)(1,2) a solution to the system of equations \displaystyle y-10x=-8y−10x=−8 and \displaystyle y=-8x+10y=−8x+10?
YES
NO
HELP
ILL GIVE THE BEST ANSER 100 POINTS!!!!
awnser im believe it is 24 i think
Answer:
20 units square
Step-by-step explanation:
do the Pythagoras theorem
a²=b²+c² ⇒ a=√b²+c²
if b is 4 and c is 2 an a is the unknown
so a=√(4)²+(2)²
a=√20
then get the rule of the area of the square
Area of the square= s²
s=a=√20 (a is the hypotenuse of the triangle and also a side in the square)
so s²=20
Area of the square=20 units square
what is the answes please I need it!
THE QUESTION IS ABOVE
Answer:
The box would be 14
Step-by-step explanation:
It would be 14 because 7/14 is equal to 1/2. And 2/4 is also equal to 1/2.
Answer:
7/14
Step-by-step explanation:
Have a nice day.....
What is the scale factor of Figure B to Figure A in the simplest form?
simple just multiply 10X25X21.5 for A and the same for B
5 m
m
7 깄
0
M
K
5
Solve for the perimeter.
3 m
P=
Answer:
It might be C if im wrong sorry
Step-by-step explanation:
A student scores the following marks in 10 tests
3,7,x,7,12,9,10,4,2,5
If the mean mark is 6, calculate the value of x.
Emily puts $10,000.00 into an account which earns 11% interest, compounded quarterly. How
much will she have in the account after 5 years? Round your answer to the nearest cent.
pls hurry it’s for a math test
s 5on2mllos pnor que creo que esesa cantdadi
ei
Help pls and thank you:)
Solve the following equation: 4(x + 2) - 17 = 35
A: -11
B: 25/2
C: 15
D: 11
Answer:
D: 11
Step-by-step explanation:
4(x + 2) - 17 = 35
4x+8 - 17=35
4x-9=35
4x=35+9=44
x=44/4=11
Help with this and I will give you the brainiest and you get 10 points
Answer:
1.-22
2.2
3.48
4.3b
5.1+5v
6.2m+20
7.p=-9
8.x=8
HELP I NEED HELP ASAP
A triangle has a perimeter of 15 feet. Side B is one foot longer than side A. Side C is two feet longer than side A. What is the length of each side.
Answer:
Side A = 4
Side B = 5
Side C = 6
Step-by-step explanation:
In the following equation, variable a is the length of Side A
a + (a + 1) + (a + 2) = 15
a + a + a + 1 + 2 = 15
3a + 3 = 15
- 3 - 3
3a (÷ 3) = 12 (÷ 3)
a = 4
Side A = 4
Side B = (a + 1) = (4 + 1) = 5
Side C = (a + 2) = (4 + 2) = 6
Billy has 8 red marbles, 6 blue marbles, and 4 green marbles in a jar.
What is the probability that Billy would select a red marble?
A. Between 10% and 20%
B. Between 20% and 30%
c. Between 30% and 40%
D. Between 40% and 50%
Answer:
A
Step-by-step explanation:
pick A cause 8 6 and 4 = 18
