Answer:
Y alone can do the piece of work in 30 days.
Step-by-step explanation:
Proportions
Let's make:
N = days for Y to finish the work alone
Since X alone can do it in 15 days, each day he can do a proportion of 1/15 of the piece of work.
Since Y alone can (possibly) do it in N days, each day he can do 1/N parts of the work.
Together, they do
[tex]\displaystyle \frac{1}{15}+\frac{1}{N}[/tex]
parts of the work per day. We know they can finish it in 10 days, thus:
[tex]\displaystyle \frac{1}{15}+\frac{1}{N}=\frac{1}{10}[/tex]
Rearranging:
[tex]\displaystyle \frac{1}{N}=\frac{1}{10}-\frac{1}{15}[/tex]
The LCM of 10 and 15 is 30, thus operating:
[tex]\displaystyle \frac{1}{N}=\frac{3-2}{30}=\frac{1}{30}[/tex]
Solving for N:
N = 30
Y alone can do the piece of work in 30 days.
Keystones tomorrow please help. Last options are B.400 C.600 D.2500
Answer:
b = 600 ft.
Step-by-step explanation:
The coordinate plane shows Line A B.
What is the length of the line segment?
Answer:
13
Step-by-step explanation:
The length of the line segment is 13 unit.
What is a line segment?A line segment is a straight line with finite length, and thus, have to endpoints(points on either ends).
If the ray lies onto the considered line segment(overlapping), then it can be said belonging to the considered line segment.
(line segment has 2 fixed ends, whereas a ray has one end only, other end is not fixed)
We are given that coordinate plane shows Line A B.
We need to find the length of the line segment.
We can see that the graph has 1 unit equal to 1 cm.
Then the coordinate for Point B is (5, 13)
The length of the line segment is 13 unit.
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Please help! Answers only please! Thx!
Answer:
2 cups
Step-by-step explanation:
For every 2 reeses pieces, there are 7 snickers. If there are 16 reeses pieces, how many total pieces of candy are there?
Answer:
There are 72 pieces of candy.
Step-by-step explanation:
Since there are 16 Reeses in all, we need to find out how many 2's can fit in 16. We can do that by either multiplying or dividing.
16 ÷ 2 = 8 or 8 × 2 = 16
So we have 8 groups of 2 Reeses, now we need to multiply the groups of Reeses by how many Snickers.
So:
8 × 7 = 56
Now we need to add the Snickers and the Reeses.
56 + 16 = 72
Answer:
72 candies
Step-by-step explanation:
To find the number of snickers, divide the 16 reese's pieces by two to get 8. For every two reese's pieces, there are seven snickers, so multiply that by seven to get 56. There are 56 snickers. Add the 56 snickers to the given 16 reese's pieces for 72 total pieces of candy. Hope this helped ^^
1 ) Oceanside Bike Rental Shop charges 12 dollars plus 9 dollars an hour for renting a bike. Dan paid 84 dollars to rent a bike. How many hours did he pay to have the bike checked out ?
Answer:
8 hours
Step-by-step explanation:
84-12=72
72/9=8
Which expression is equivalent to
1/5 m - 20 ?
A: 1/5 (m - 4)
B: 1/5 ( m - 100)
C: 5(m - 4)
D: 5(m- 100)
Answer:
It's A I believe, if not then its B. hope that this helps :D
Step-by-step explanation:
please help with this question i really need help
Answer:
(x+15)+(3x-17)=90
4x-2=90
x=92/4=23
What is the solution to the system of equations?
y = 2x + 6
y= x+ 2
A. (0,0)
C. (-2,-4)
B. (-4,-2)
D. (3,6)
Answer:
B
Step-by-step explanation:
Given the 2 equations
y = 2x + 6 → (1)
y = x + 2 → (2)
Substitute y = 2x + 6 into (2)
2x + 6 = x + 2 ( subtract x from both sides )
x + 6 = 2 ( subtract 6 from both sides )
x = - 4
Substitute x = - 4 into either of the 2 equations and evaluate for y
Substituting into (2)
y = - 4 + 2 = - 2
solution is (- 4, - 2 ) → B
Tarra wants to buy grapes. If one pound of grapes costs $1.98, how much does Tarra pay for One-half of a pound of grapes?
$0.99
$1.98
$2.48
$3.96
0.99
one pound costs 1.98, so you divide that by 2 to figure out what half a pound would cost
A book is open to two consecutative pages whose product is 1,806. What is the sum of the 2 page numbers?
Answer:
42, -43
Step-by-step explanation:
Perform the requested operation or operations. F(x)=4x+9, g(x)=4x^2 Find (f+g)(x)
A) 16x^3 +36x
B) 4x+9/4x^2
C) 4x+9-4x^2
D)4x+9+4x^2
Which expression has a value greater than the given expression when a = 2?
2(a + 6)
2a + a²
2a + 12
4a + 8
a4+2
Step-by-step explanation:
a4+2
Pamela is making pizzas. She has 112 pieces of pepperoni. She uses 29 pieces of pepperoni on the first pizza. If she uses the same amount on each pizza, does she have enough pepperoni to make 4 more pizzas?
Answer:
No
Step-by-step explanation:
Number of pieces of pepperoni available with Pamela = 112
Number of pieces of pepperoni used in one pizza = 29
Now, number of pepperoni left after using 29 in one pizza = 112 - 29 = 83
Now, Pamela makes second pizza, so again 29 pieces of pepperoni area used.
Now, number of pepperoni left after using 29 in one pizza = 83 - 29 = 54
Now, Pamela makes third pizza, so again 29 pieces of pepperoni area used.
Now, number of pepperoni left after using 29 in one pizza = 54 - 29 = 25
To make the third pizza, another 29 pepperoni are required but only 25 are available.
Therefore, there is not enough pepperoni for making 4 more pizza.
The line passing through which two points is parallel to the line x - 2y = 16?
A) -6,-1 and 2,-5
B) -4,-6 and 2,-9
C) -5,7 and 0,-3
D) -1, 5 and 3,13
E) -4,7 and -2,8
Answer:
E) -4,7 and -2,8
Step-by-step explanation:
parallel lines have same slope
x - 2y = 16
y = 1/2 x -8 slope: 1/2
E. slope = Δy / Δx = (8-7) / (-2 - -4) = 1/2
Using the slope, it is found that the line passing through points (-4,7) and (-2,8), option E, is parallel to the given line.
----------------------
The equation of a line, in slope-intercept formula, is given by:
[tex]y = mx + b[/tex]
In which m is the slope.If two lines are parallel, they have the same slope.Given two points, the slope is given by change in y divided by change in x.----------------------
The line given is:
[tex]x - 2y = 16[/tex]
In slope-intercept formula:
[tex]2y = x - 16[/tex]
[tex]y = \frac{x}{2} - 8[/tex]
----------------------
In this question, we want a line with an slope of 1/2.
At option E, the points are (-4,7) and (-2,8), thus, the slope is:
[tex]m = \frac{8 - 7}{-2 - (-4)} = \frac{1}{-2 + 4} = \frac{1}{2}[/tex]
Thus, the line passing through points (-4,7) and (-2,8), option E, is parallel to the given line.
A similar problem is given at https://brainly.com/question/22532445
combine like terms to simplify each expression. 1: 3/4z(3)+4-1/4z(3). 2: 3.4m+2.4m. 3: 4.2n+5-3.2n. 4: q(5)+q(5)+q(5). 5: 3x+1/4+2y+1/4+7x-y. 6: 1.5z(2)+4.5+6z-0.3-3z+z(2)
Explanation and steps to the expressions are marked in order in the images below.
1. Answer is 3z/2 + 4
2. Answer is 5.8m
3. Answer is n + 5
4. Answer is 15q
5. Answer is 10x + 1/2 + y
6. Answer is 8z + 4.2
The maximum is five images, so I cannot add the last explanation and steps for the last expression.
What is 78.74 rounded to the nearest tenth
Answer: 78.74 is closer to 80 than 70. The answer is 80
Step-by-step explanation:
A chess team is ordering customized T-shirts for a competition. The table shows the cost of orderi
Number of T-shirts, 6 12 18
24
Cost (dollars), y
108
180
252
324
A linear model is yr
Answer:
12x+36
Step-by-step explanation:
If we subtract 36 from all 4 y's we get 72, 144, 216, and 288. We divide each one by 6, 12, 18, and 24. After we divide them up, we get 12 for each one. Now we need to set the equation up, it has to be 12x because the price of just one T-shirt is $12, the x is how many T-shirts are bought. The 36 is the b-intercept of the equation, and since we write this in y=mx+b, the equation is y=12x+36.
A linear model will be 12x+36.
What is a linear model?A linear model specifies a linear relationship between a dependent variable and n independent variables.
Given that, A chess team is ordering customized T-shirts for a competition. The table shows the cost of ordering
Number of T-shirts, 6 12 18 24
If we subtract 36 from all 4 y's we get 72, 144, 216, and 288. We divide each one by 6, 12, 18, and 24. After we divide them up, we get 12 for each one. Now we need to set the equation up, it has to be 12x because the price of just one T-shirt is $12, the x is how many T-shirts are bought. The 36 is the b-intercept of the equation, and since we write this as y=mx+b, the equation is y=12x+36.
Hence, A linear model will be 12x+36.
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PLEASE ANSWER ASASP FOR BRAINLEST!!!!!!!!!!!
The number of blood donors at an annual drive increased this year by 20% from last year. If there were d donors last year, write two different expressions for the number of donors this year. Select all that apply
A. 1.20d
B. d+0.20d
C. d - 0.20d
D. 0.80d
Answer:
A and B
Step-by-step explanation:
Are Linear Pairs congruent all the time on a transversal line?
Answer:
yes
Step-by-step explanation:
When a transversal cuts parallel lines, all of the acute angles formed are congruent, and all of the obtuse angles formed are congruent.
someone can answer this?
x + y + 2 and x - y - 1
2x-2y+1
Step-by-step explanation:
you will add ir subtarct like terms only
Answer:
2x - 6y
Step-by-step explanation:
u have to divide
What is 0.80 as a fraction?
Answer:
just type it into ur web browser and you can get the answer
Step-by-step explanation:
thats what i do <3
Explain how to estimate the quotient using compatible numbers.
27 2/3 divided by 3 9/10
Answer:
~7
Step-by-step explanation:
We can estimate 27 2/3 to be 28 because it is only 1/3 away from a whole number. Similarly, we can estimate 3 9/10 to be 4 because it is only 1/10 away from a whole number. Dividing the two, we get:
(27 2/3)/(3 9/10) = ~28/4 = ~7
We can estimate that the quotient of (27 2/3)/(3 9/10) will be about 7.
I hope this helps! :)
Compute the exact value of the function for the given x-value without using a calculator.
f(x) = 5x for x = -1
a. 1/5
b. -1/5
c. 1/1
d. -5
Answer:
d
Step-by-step explanation:
Given
f(x) = 5x , then substitute x = - 1, that is
f(- 1) = 5 × - 1 = - 5 → d
Answer:
D
[tex]f(x) = 5x \: \: \: when \: x = - 1 \\ f( - 1) = 5( - 1) \\ f( - 1) = - 5[/tex]
evaluate
-8÷2+12×9-4×6
Answer:
Step-by-step explanation
PEMDAS
I would insert some parenthesis first
(-8/2)+(12*9)-(4*6)=
(-4)+(108)-(24)=-4+108-24=80
One winter day, the temperature outside was 13°F. Overnight, the temperature dropped 9°F. What is the temperature at its coldest point? Describe how you would find your answer on a number line.
Answer:
the coldest point would be 4 degrees.
Step-by-step explanation:
On a nuber line you would plot the point 13 and go back on the number line 9 units and you would get 4 degrees.
The temperature at its coldest point is 4° F.
Given that, one winter day, the temperature outside was 13°F. Overnight, the temperature dropped 9°F.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Let the temperature at its coldest point be x.
Now, x = 13 - 9
= 4° F
Therefore, the temperature at its coldest point is 4° F.
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i need major help but y’all don’t help
Answer:
What is the question
Step-by-step explanation:
What is the distance between -21 and 6 on a number line, in units?
Answer:
27 units
Step-by-step explanation: 21 +6 = 27 they are 27 units apart
plzzzzzzzzzzzzzzzzzzzzzz
Answer:
1. 4e^2
2. 2c^2
3. 3a^4
Step-by-step explanation:
1. 12e^5/3e^3.
Simplify:
12/3=4
e^5/e^3=3^2.
4e^2.
2. 8c^3d^2/4cd^2
d^2 cancels out
c^3/c^1=c^2
8/4=2
2c^2.
3. 4a*6a^5/8a^2.
First combine 4a*6a^5
4a^1*6a^5
24a^6.
24a^6/8a^2
3a^4.
Hope this helps you :D
Have a great day :D
Meters using decimal
a) 670 cm
b) 12m 7cm
c) 86cm
Answer:
I assume we are converting to meters so
a) 6.7 m
b) 12.07 m
c) 0.86 m
Step-by-step explanation:
To convert cm to m you divide the cm value by 100
Please help me :(, I want to understand how to prove it
Answer:
We know that angels 5 and 6 are vertical angles, and that vertical angles are equal. We also know that angles 7 is equal to angle 6, in turn meaning that angle 7 is also equal to angle 5. Now we look at angle 8. We can see that angle 8 is vertical to angle 7, meaning its also equal to angle 7. We already established before that angle 7 is equal to angle 5, so if angle 8 is equal to angle 7 which is equal to angle 5. Then angle 8 is equal to angle 5.
Hope this helps! Message me if you still don't understand
Answer:
basta ver os ângulos e ver oque sobrar e sua resposta boa noite espero ter ajudado