Answer:
30 minutes each evening
Step-by-step explanation:
5.25 / 7 = 0.75 hours each day = 45 minutes
45 - 15 = 30 minutes
30. Find the value of expression 20m2 + 30m + 40 when a)m = -3 b)m= - 4 c) m = 3
Answer:
di you mean m² when you say m2 or not?
The values of the expression are;
-21, 240, 310 respectively
We were given the equation as ;
20 [tex]m^{2}[/tex] + 30m + 40
Then we can find the values of the expression with the given options to know the answer by input the value of ' m' into the given equation
Option (a) (m=-3)20( [tex]-3^{2}[/tex] )+ 30(-3)+ 40 = -21Option (b) (m=-4)20([tex]-4^{2}[/tex] )+ 30(-4)+ 40 = 240Option (c) (m=3)20([tex]3^{2}[/tex]) + 30(3)+ 40 = 310Therefore, the values of the expression are; -21, 240, 310 respectively
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If takes 660 metres of fence to enclose a rectangular field. if one side is 30 metres less that twice the other side, find the dimensions of this field (Please help)
Answer:
210 by 120
Step-by-step explanation:
perimeter=2l+2w
length= 2w-30
width= w
2(2w-30+w) = 660
6w-60= 660
6w= 720
w=120
length= 2*120-30 = 210
ayuda por favor 5.800%(-10)
Answer: -0.58
Divide 5.8 y 100 y te da 0.058 despues lo multiplicas con (-10) y te da -0.58
3 pencils cost $0.45. What is the cost per pencil?
Answer:
0.15
Step-by-step explanation:
Dom runs a pizza business. Last year he took in $88 000 and it cost him $33 000
to run. What is his percentage profit for the year? Round to the nearest cent.
Answer:
The percentage profit for the year is 62.50%
Step-by-step explanation:
Here, we want to calculate the percentage profit
That would be difference between the revenue (88,000) and the cost (33,000) divided by the revenue * 100%
We have this as;
(88,000-33,000)/88,000 * 100%
= 55,000/88,000 * 100%
= 62.50%
PLEASEEE ASAPPPPP BRAINLIEST
given the equation y = 3x +2, which of the following slopes would have a parallel line have
Answer:
y = 3x + 2 because there are no value for x.
Step-by-step explanation:
Last HW Mr Thompson! Please Help!
Answer:
B, D, D, B, C
Step-by-step explanation:
1) The part of the equation that tells us the graph would open downward would be B, the negative coefficient of [tex]x^{2}[/tex].
We know this because, if we reorganize the equation into the standard form y = mx + b, we get y = -(x²) + 1. This means that for any value we substitute for x, y will always be negative. The answer is B.
2) To find the zeroes of this function, we just have to see which answer makes the function, well, zero.
We have the equation y = (-16t - 2) (t - 1)
We set the equation equal to zero like this:
0 = (-16t - 2) (t - 1)
We also know that anything multiplied by zero will equal zero, so:
0 = (-16t - 2) and 0 = (t - 1)
Now we just solve for t in both equations:
0 = -16t - 2
-16t = 2
t = 2/-16 or -1/8
0 = t - 1
t = 1
So our answer will be D.
3) This time, we are given the same equation but the variable t represents time and y represents the height.
The zeroes are when y = 0, so the zeroes (which are 1 and -1/8 from the last problem) mean that the height is also at zero (which is the ground).
Furthermore, time cannot be negative, so the correct answer choice would be D.
4) We are given the same equation and story problem, but instead we are asked to find the height when the ball was thrown. In other words, we need to find the y-intercept.
The y-intercept is when t = 0, so:
y = (-16t - 2) (t - 1)
y = (-16(0) - 2) (0 - 1)
y = (-2) (-1)
y = 2
So, the correct answer is B, 2 feet.
5) This problem is a simple theoretical question. We know that the constant c will represent the vertical translation or y-intercept, so the correct answer is C.
Anyone know how to do this?!!
Answer:
slope is -1/4
Step-by-step explanation:
[tex]\frac{-4}{12}[/tex]=[tex]\frac{-1}{4}[/tex]
[tex]\frac{-2}{8}[/tex]= [tex]\frac{-1}{4}[/tex]
and so on...
formula: [tex]\frac{x}{y}[/tex]
hope this helps!!!
share £84 in the ratio 6:3:3
Annual snowfall in Anchorage, Alaska, is normally distributed with a mean height of 76 inches and a standard deviation of 4.7 inches. What is the probability this year that it will snow between 71.4 and 80.7 inches in Anchorage?
Using the Empirical Rule, it is found that there is a 68% probability this year that it will snow between 71.4 and 80.7 inches in Anchorage.
What is the Empirical Rule?It states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.Approximately 95% of the measures are within 2 standard deviations of the mean.Approximately 99.7% of the measures are within 3 standard deviations of the mean.In this problem, the mean height of 76 inches and a standard deviation of 4.7 inches, hence 71.4 and 80.7 inches is within 1 standard deviation of the mean, that is, there is a 68% probability this year that it will snow between 71.4 and 80.7 inches in Anchorage.
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A book cost $10 at one book store.About how much more does the book cost when the book store increase it prices 18%.
Answer:
11.8
Step-by-step explanation:
18% of 10 so more the decimal only one time because you only have one 0 and you get 1.8. ok then 1.8 to 10 =11.8
The book cost $11.8 when the book store increases its prices by 18%.
What is the percentage?A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.
Given, A book cost $10 at one book store which is 100% of its price.
Now, The book store increases its prices by 18%.
Therefore, The new price of the book is (100 + 18) = 118% of $10 which is,
= (118/100)×10.
= 1.18×10.
= $11.8
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If , then what is mto the nearest degree?
Answer:
70 degrees
Step-by-step explanation:
If cosm<A = 342/1000, we are to find the value of a
Take arccos of both sides
cosm<A = 342/1000
cosm<A = .342
arccos(cosm<A) = arccos(0.342)
m<A = arccos(0.342)
m<A = 70 degrees
Hence the measure of m<A is 70 degrees
Solve for x: −4x+6(6−2x)=−7x−36
Answer:
x = 8
Step-by-step explanation:
-4x + 6(6 - 2x) = -7x - 36
-4x + 36 - 12x = -7x - 36
-16x + 36 = -7x - 36
+36 +36
-16x + 72 = -7x
+16x +16x
72 = 9x
divide by 9
x = 8
Add the polynomials:
2a+3b+5a-7b Explain your response
7a - 4b
Step-by-step explanation:
Add the numbers ending with 'a' together, and then add the numbers ending with 'b' together.
First of all, I will put the letters beside each other.
2a + 5a + 3b - 7b
2a + 5a = 7a
3b - 7b = - 4b
Therefore, the answer is 7a - 4b.
PLS HELP!! GIVING BRAINLIST!!
Michael uses a blend of dark chocolate and milk chocolate to make the ice cream topping at his restaurant. He needs to buy 100 kg of chocolate in total for his next order. Dark chocolate costs $12 per kilogram, milk chocolate costs $10 per kilogram, and he wants to spend $1120 total.
Let d be the number of kilograms of dark chocolate he buys and m be the number of kilograms of milk chocolate he buys.
Which system of equations represents this situation?
Answer:
d + m = 100
12d + 10m = 1120
Step-by-step explanation:
d = 60
m = 40
Answer: 60 kg dark chocolate, 40 kg milk chocolate
Step-by-step explanation:
Okie soooo
Let's name the variables (which they did for us lol)
d = kg of dark chocolate and m = kg of milk chocolate
He needs 100 kg of chocolate
d + m = 100
and he wants to spend 1120 when dark chocolate costs $12/kg and milk chocolate costs $10/kg
12d + 10m = 1120
Now we solve the system (I shall use elimination method)
Multiply the first equation my -10
-10(d + m) = (100)(-10)
which becomes
-10d - 10m = -1000
12d + 10m = 1120 (rewrite the second equation)
------------------------- (add the two equations together)
2d = 120
d = 60
now substitute d into either equation
60 + m = 100
m = 40
60 kg dark chocolate
40 kg milk chocolate
-8/5 X= 56
solve
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Answer:
x = -35
Step-by-step explanation:
-8/5x = 56
Start by multiplying both sides by 5 to get rid of the fraction. That will leave you with:
-8x = 280
You can then divide both sides by -8 and then you'll get x = -35
Answer:
x=-35
Step-by-step explanation:
-8/5x is gonna be -1.6x and you divide 56 by -1.6x and get x=-35
1/3 x (15 + 6) = ??????????????
Answer:
10[tex]\frac{1}{3}[/tex]
Step-by-step explanation:
[tex]\frac{1}{3}[/tex]×(15+6)=
[tex]\frac{1}{3}[/tex]×(31)=
[tex]\frac{1}{3}[/tex]×[tex]\frac{31}{1}[/tex]
[tex]\frac{31}{3}[/tex]
10[tex]\frac{1}{3}[/tex]
Help me ASAP!!!!!!!!!
See picture attached.
WINNER GETS BRAINLIEST, A STAR RATING OF EXCELLENT AND THANKS!!!!!!!!!!! Good luck!
Answer:
Step-by-step explanation:
A)8
80 timess 40 plus 60
Answer:
3260 hope i helped u
Step-by-step explanation:
Two forces, with magnitudes of 115 pounds and 160 pounds, are acting on an object at angles of 50° and 130°, respectively, with the positive x-axis. Find the magnitude and direction (with the positive .r-axis) of the resultant force.
Answer:
Step-by-step explanation:
x=(115cos50+160cos130)=-28.9254
y=(115sin50+160sin130)=210.6622
m^2=x^2+y^2
m=212.64
angle=180+arctan(y/x)
angle=97.82
v=212.64 at 97.82 degrees
3n + 8 = 53
I don’t understand how to find the n
Answer:
n=15
Step-by-step explanation:
subtract 8 from both sides to get 3n=45
divide both sides by 3 to solve for n to get n=15
Answer:
n = 15
Step-by-step explanation:
3n + 8 = 53
the first step we are going to do is combine the like terms by moving the constant (8) to the right and subtracting
3n = 45
next step, we are going to isolate the n by dividing by 3 on both sides of the equation
3n divided by 3 is just n and 45 divided by 3 is 15, so we have our answer
Pls answer if u know the answer, don't just do it for points.
A motor is rated at 1500 Watts and a second motor is rated at 2200 Watts. If they each needed to lift a 100 kg box 20 meters, which one would get the job done first?
Answer:
motor of the 1500
Step-by-step explanation:
i took the test hopefully is the right one.
WILLLLLLLLLLLL MARK BRAINLISTTTTTTT
Answer:
f (8) = ( -161 )
Step-by-step explanation:
[tex]f(x)=-3x^{2} +3x+7[/tex]
To find f(8) sub 8 for x in the equation and simplify:
[tex]f(8)=-3(8^{2} )+3(8)+7[/tex]
= -192 + 24 + 7
= -168 + 7
= -161
so f(8) = -161
Multiplying by 0.51 is the same as decreasing by___%
Answer:
The correct answer is 51%
a company has 15.5×108
Answer:
1674
Step-by-step explanation:
Answer:
1674
Step-by-step explanation:
Megan ran 1 3/4 miles. What is this as an improper fraction?
Answer:
Yes it is improper fraction
whats is the cost of electricity to run personal computer
Answer: Desktop computers can cost anywhere from $300-$4,000 depending on how good it's inside components are. The average computer might go for around $400. For more advanced computers the price might be $1,000 or more. All in all, the cost of a computer / PC truly depends on how much power you're needing from it.
Step-by-step explanation:
Srry its kinda confusing but I hope it helped
Answer:
We estimate that an average modern desktop PC will use approximately 100 watts of power, not including the display screen. Click calculate to find the energy consumption of a desktop computer using 100 Watts for 6 hours a day with $0.10 per kWh
Step-by-step explanation:
Where do you see rotation in our lives/world?
Answer:
There's a rotation in our schedule if things we do everyday.
Step-by-step explanation:
Hope this helps :D
pls hurry will give brainliest
Answer:
Step-by-step explanation:
6(k + 2) + 1 = 13 (distribute 6 around the k+2)
6k + 12 + 1 = 13 (add 12 and 1)
6k + 13 = 13 (subtract 13 from both sides)
6k = 0 (divide by 6)
k = 0
Answer:
6( k + 2 ) + 1 = 13
6k + 12 + 1 = 13
6k + 13 = 13
6k = 0
k = 0/6
so it will 0