The average age of a group of 30 children is 10.3 years. The average age of another group of 50 children is 8.7 years. Find the average age for all of the 80 children
Answer:
9.3
Step-by-step explanation:
30*10.3 = 309
50*8.7 = 435
309 + 435 = 744
744 / 80 = 9.3
9.3
pls mark me as brainliest!!
Solving quadratic equations solve: x^2=81
Answer:9
Step-by-step explanation:
Square root of 81 is9.
Krutika was thinking of a number. Krutika doubles it, then adds 19 to get an answer of 65. What was the original number?
Answer:
i tink its 46 yhhhhh
HELP!
Jessica is an elite marathon runner. For her most recent long run, she ran 15 miles in 90 minutes. What is her speed?
Answer:
10 mph
Step-by-step explanation:
So speed is usually written in miles per hour (mph) so I'm assuming that's how you want it.
90 minutes is 1.5 hours
15/1.5=10
Explain which line must be parallel pllleeeaaaasser hurryyyy
Answer:
Lines P and Q
Answer:
parallel lines are lines that are directly next to each other so i think line's
p and q
Step-by-step explanation:
please mark me the brainliest if i am right
I'LL GIVE BRAINYEST
A box shaped like a rectangular prism has a height of 8 inches, a width of 6 inches, and a volume of 240 cubic inches. What is the length?
7 inches
6 inches
5 inches
4 inches
Answer:
7 inches..............
Answer:
8
Step-by-step explanation:
Volume = Length * Width * Height
512 = 8*8*Height
Height = 512/64=8
28. An Amazon Echo originally costs $99.99. It is on sale for 10% off. Sales tax of 7.5% is then added to the sale price. What is the cost of the Echo on sale including tax? Round your answer to the nearest penny.
Answer:
$96.74
Step-by-step explanation:
The original cost of the Amazon echo = $99.99
Then we have a 10% sale which we are going to subtract from the original cost.
= $99.99-(99.99x10%)
= 99.99-9.999
= $89.991
Then a tax of 7.5% was added
= $89.991 + (89.991 x 7.5%)
= 89.991 + 6.749325
= $96.740325
Therefore the cost of the echo including tax is $96.74
Find the x- and y-intercepts of the linear function.
-8 - 2x + 4y = 0
Answer: x-2y=-4
Step-by-step explanation:
Move the constant to the righthand side and change its sign (-2x=4y+8)Change the signs on both sides of the equation (x-2y=-4)Divide both sides of the equation by 2 (-x+2y=4)Solution: x-2y=-4What is the equation, in point-slope form, of the line
that is parallel to the given line and passes through the
point (4, 1)?
Answer:
Step-by-step explanation:
Given:
The line parallel to the given line containing the points (-3,3) and (-2,1).
Also, the parallel line passes through the point (4,1).
We need to determine the equation of the line in slope - intercept form.
Slope:
Since, the two lines are parallel, then their slopes are equal.
Thus, the slope of the parallel line can be determined using the formula,
Substituting the points (-3,3) and (-2,1), we get;
Thus, the slope of the line is
Equation of the line:
The equation of the line can be determined using the formula,
Since, the line passes through the point (4,1), let us substitute the point (4,1) in the above formula, we have;
Thus, the equation of the line is
Hence, y − 1 = −2(x − 4) is the correct answer.
:)
tony is taking a 5 year loan in the amount of $15,000. The interest is continuously compounded at an annual rate of 7%. How much will he owe, in dollars, at the end of the loan term?
Answer:
$21,038.28
Step-by-step explanation:
Use the equation 15000(1.07)^5 since 1.07 equals to 7% and you are loaning more money to Tony's account for 5 years. You should get $21,038.28 as your result.
Answer: 21286
Step-by-step explanation:
An object moves along a straight line so that at any time t , for 0≤t≤8 , its position is given by x(t)=5+4t−t2 . For what value of t is the object at rest?
A. t = 2
B. t = 4
C. t = 9/2
D. t = 5
Answer:
D. t = 5
when the object is at rest => x(t) = 0
<=> -t^2 + 4t + 5 = 0
<=> t^2 - 4t - 5 = 0
<=> (t - 5)(t + 1) = 0
=> t = 5 or t = -1
but t》0
=> t = 5
The value of t if the object at rest is 2 secs: Option A is correct
Given the position of the object moving in a straight line expressed as:
x(t)=5+4t−t²
The velocity of the body at rest is zero
Get the velocity fucntion.
v(t) = d(x(t))/dt = 4 - 2t
Since v(t) = 0
0 = 4 - 2t
-4 = -2t
t = 2
Hence the value of t if the object at rest is 2 secs
Learn more here: https://brainly.com/question/17917549
leyes logicas de la matematica
Step-by-step explanation:
Leyes conmutativas. ...
- Leyes asociativas. ...
- Leyes distributivas. ...
- Leyes de idempotencia. ...
- Leyes de Morgan.
Please help me solve this.
Answer:
The function is increasing on the intervals (-∞, -1) and (2, ∞)
The function is decreasing on the intervals (-1, 2)
The domain of the function is (-∞, ∞)
Step-by-step explanation:
In order to see where the function is decreasing or increasing, check the x values to see where it is the rise and where it is fall. The domain of the function is never-ending so it is (-∞, ∞)
Find the common difference in the arithmetic sequence, an, in which a3=11 and a12=74.
Answer:
d=7
Step-by-step explanation:
Alicia records the total number of points scored in two games by 10 players on her basketball team.
28, 13, 4, 8, 15, 10, 22, 7, 11, 15
Which box plot represents the data
Answer:
Your answer would be D It makes much more sense than the others
Step-by-step explanation:
good luck :)
Answer:
First option at second row , Option( C )
Step-by-step explanation:
In order to solve the problem,
First we need to arrange the numbers in ascending order.
4 , 7 , 8 , 10 , 11 , 13 , 15 , 15 , 22 , 28
Median = [tex]\frac{11 + 13}{2}[/tex]
= 12
From the first range ( 4,7,8,10,11 ) , we can find Q1 also known as first quartile where Q1 = 8 ( middle-most number).
Similarly, from the second range ( 13,15,15,22,28 ) , we can find Q2 also known as third quartile where Q3 = 15 (middle-most number ).
Now, for the box plot,
We need to draw a number line from 0 to 32.
Next, we need to draw a box from Q1 to Q3 with a vertical line through the median.
Next, we put dots above 4 and 28 since our numbers start from 4 and end with 28.
Finally we join the dots and the box plot with a straight line.
Hence, option C is the correct choice.
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what if the answer????
formula for perimeter of a square
Answer:
Let the side of the square be x
Then the perimeter of the square is 4×(side)=4x
Combine like terms in each expression
1. 1/4k+1/4m-2/3k+5/9m
2. -4b + 2w + (-4b) + 8w
3. 6- 5z + 8 - 4z + 1
Answer:
5/12k = 29/36m
8b = 10w
9z = 15
Step-by-step explanation:
Combining the like terms in these sets of equations is quite easy and straightforward. All we do is carry the like terms to either of the side of the equation, and question is solved. As in below
1/4k + 1/4m - 2/3k + 5/9m =
1/4k - 2/3k + 1/4m + 5/9m = 0
-5/12k + 29/36m = 0
5/12k = 29/36m
-4b + 2w + (-4b) + 8w =
-4b - 4b + 2w + 8w = 0
-8b + 10w = 0
8b = 10w
6- 5z + 8 - 4z + 1 =
6 + 8 + 1 - 5z - 4z = 0
15 - 9z = 0
9z = 15
Please help<3
Select the correct answer.
Which equation is equivalent to the given equation?
22 - 6x = 8
OA (1 – 3)2 = 14
OB. (1 – 3)2 = 17
Oc. (= – 6)2
OD. (1 – 6)2 = 20
= 44
Answer:
Step-by-step explanation:
B
Let f(x)=x−1. The graph of g(x)=f(x)+k is shown below. Identify the value of k.
Explanation:
The linear equation f(x) = x-1 has the y intercept -1. We can see this by comparing it to y = mx+b and see that b = -1. Or we could plug in x = 0 to get the output y = -1.
The graph shows the y intercept is y = 3. The jump from y = -1 to y = 3 is plus 4. This means the graph of f(x) has been moved up 4 units. Therefore, k = 4.
Since y = f(x), saying g(x) = f(x)+k = f(x)+4 means we add 4 onto each y value. This indicates every point on the f(x) line moves up 4 units to arrive at a corresponding point on the g(x) line.
Solve for w.
-9 – 7W = -9 – 8w
Answer:
Step-by-step explanation - w= o
The equation of a circle is A is x^2
Answer: ??
Step-by-step explanation:
This might help :/
Area of a circle = pie r^
Circumference = 2pie r
Estimate the sum or difference 8/9 + 3/8
Answer:
1/19/72
Step-by-step explanation:
how much more is subtraction or addition JUST ASKING OUT OF CURIOSTY
Answer:
subtraction is less
Step-by-step explanation:
PLEASE HURRY ITS TIMED THANKS SO MUCH :D
The unit price of a 128-ounce jug of milk is 4.8 cents per ounce. A 64-ounce carton of milk has a unit price of 5.1 cents
per ounce. Approximately how much money is saved by purchasing a larger jug instead of two cartons?
O $0.38
O $0.54
O $4.27
O $6.14
Answer:
O.38
Step-by-step explanation:
Answer:
0.38
Step-by-step explanation:
Edgen 2021
How many solutions does the system have?
- 2x - 4
y = 3x + 3
Choose 1 answer:
A
Exactly one solution
B
No solutions
С
Infinitely many solutions
Identify a2. in the sequence below.
12, 7, 2, -3..
Answer: -7 This may be wrong. Sorry if it is.
What is the value of the expression when x = 5? 3x^2 + 14 - 10x
Answer: 39
Step-by-step explanation:
April pays a dog-walking service $30 each week to walk her dog. Let w = the number of weeks. Let d = the number of dollars April pays the service. Part A Which equation represents the problem? A. d = w + 30 B. w = d × 30 C. w = 30 + d D. d = w × 30 Part B Drag numbers to complete the table to show the number of dollars, d, that April spends on dog-walking in w weeks. Numbers may be used once, more than once, or not at all. 61803460150200 w 1 2 5 d 30 90 120
Answer:
Rule + 30, Equation: w=d+30
Step-by-step explanation:
Hope this will help some of you!
The amount in dollar for w weeks be d= 30 x w.
what is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
Given:
Let w = the number of weeks.
Let d = the number of dollars April pays the service.
April pays a dog-walking service $30 each week to walk her dog.
So, the equation represents the situation
d= 30 x w
Hence, the amount in dollar for w weeks be d= 30 x w.
Learn more about Algebra here:
https://brainly.com/question/24875240
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Write a decimal that the model represents
Answer:
number = 0.011
Step-by-step explanation:
Decimal Representation
The model is shown in the figure. It has a form of a cube where each face is divided into 10 equal squares, forming a 10x10x10=1,000 smaller cubes piece.
Out of that 1,000 cubes, only 11 are shaded. This leaves us to think the decimal represented by the model is the division between the shaded cubes by the total cubes, thus:
[tex]number= \frac{11}{1,000}[/tex]
Dividing:
number = 0.011
solve the question below
Step-by-step explanation:
done.....
............I got doubt about last answer...