Answer:
71
Step-by-step explanation:
Can someone help me with this one question please thank you
i really need help,please. also happy holidays!
Answer:
D
Step-by-step explanation:
Which matrix represents the system of equations?
3x + y = -9
x + 5y = 16
A. [3 0 ]
[0 5 ]
B. [3 1]
[1 5]
C. [3 0| -9]
[0 5| 16]
D. [3 1| -9]
[ 1 5| 16]
9514 1404 393
Answer:
D. [3 1 | -9]
[ 1 5 | 16]
Step-by-step explanation:
The matrix of B represents the coefficients of the variables. It would generally be part of a matrix equation:
[tex]\left[\begin{array}{cc}3&1\\1&5\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right] =\left[\begin{array}{c}-9\\16\end{array}\right][/tex]
However, the entire system of equations can be represented by the augmented matrix ...
[tex]\left[\begin{array}{cc|c}3&1&-9\\1&5&16\end{array}\right] \qquad\textbf{matches D.}[/tex]
13.) A human resources director of a large company is interested in how often employees
use their computers during breaks. She watchesa selected group of employees at their desks
during the break times. This study would best be described as
a. An observational study
b. A census
C. A sample
d. An experiment
Answer:
its A
Step-by-step explanation:
The rectangle shown has a perimeter of 54 cm and the given area. Its length is 3 more than twice its width. Write and solve a system of equations to find the dimensions of the rectangle. The length of the rectangle is _ cm and the width of the rectangle is _ cm.
Answer:
length of the rectangle is 19 cm and the width of the rectangle is 8 cm.
Step-by-step explanation:
The formula for the perimeter of a rectangle = 2L + 2 W
Where:
L = length and W = width
The rectangle shown has a perimeter of 54 cm
Its length is 3 more than twice its width.
2L + 2W = 54 .... Equation 1
"length is 3 more than twice its width."
L = 2W + 3.....Equation 2
Substituting 2W + 3 for L
We have:
2L + 2W = 54 .... Equation 1
2(2W + 3) + 2W = 54
4W + 6 + 2W = 54
6W = 54 - 6
6W = 48
W = 48/6
W = 8cm
L = 2W + 3.....Equation 2
L = 2(8) + 3
L = 16 + 3
L = 19 cm
Therefore:
length of the rectangle is 19 cm and the width of the rectangle is 8 cm.
I’ll mark u as brainlist if u help with this one
Answer:
(11, 18) or x = 11, y = 18
Step-by-step explanation:
I've deduced that equation 1 is y = x + 7 (just by the pattern)
and the second one is y = 26.25 - 0.75x
Solving this system of equations you get x = 11 and y = 18
Answer:
x = 11 and y = 18
Step-by-step explanation:
Erin owns 48 movies on DVD. Three eighths of the movies are comedies, 1/3 are dramas, 1/4 are action adventure, and the rest are science fiction. What part of her movie collection is science fiction?
help pls thanks huys
Answer:
12
Step-by-step explanation:
Let the unknown number be x.
8 = -4(1) + x
8 = -4 + x
x - 4 = 8
x = 8 + 4
x = 12
Answer:
[tex]a_{n}[/tex] = - 4n + 12
Step-by-step explanation:
The n th term of an arithmetic sequence is
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 8 and d = a₂ - a₁ = 4 - 8 = - 4 , then
[tex]a_{n}[/tex] = 8 - 4(n - 1) = 8 - 4n + 4 = - 4n + 12
Can anyone plz help me
Answer:
They multiplied the exponents instead of adding.
Step-by-step explanation:
Essentially, 2^2 x 2^3 is (2)(2) x (2)(2)(2) which is 5, not 6
Answer:
when it says times it doesn't mean times the powers it means add
basically the first one is correct
The lines shown below are parallel. If the green line has a slope of -4, what is
the slope of the red line?
Answer:no graph is shown below
Step-by-step explanation:
But since is no solution they can't have the same slope.
NEED ANSWER FAST 13 POINTS!
Answer:option 2
Step-by-step explanation:
Answer:
im pretty sure its option number 2
Choose the answer that validates that the rate of change is constant by showing that the ratios of the two quantities are proportional and equivalent to the unit rate (simplified constant rate of change): NUMBER OF TEXTBOOKS Number of Students Number of Textbooks 7 35 14 70 21 105 28 140
Given:
The table of values is
Number of Students : 7 14 21 28
Number of Textbooks : 35 70 105 140
To find:
The rate of change and showing that the ratios of the two quantities are proportional and equivalent to the unit rate.
Solution:
The ratio of number of textbooks to number of students are
[tex]\dfrac{35}{7}=5[/tex]
[tex]\dfrac{70}{14}=5[/tex]
[tex]\dfrac{105}{21}=5[/tex]
[tex]\dfrac{140}{28}=5[/tex]
All the ratios of the two quantities are proportional and equivalent to the unit rate.
Let y be the number of textbooks and x be the number of students, then
[tex]\dfrac{y}{x}=k[/tex]
Here, k=5.
[tex]\dfrac{y}{x}=5[/tex]
[tex]y=5x[/tex]
Hence the rate of change is constant that is 5.
Solve the inequality.
-12p -82-2(1 + 8p) – (6 - 4p)
How do u do this?
Answer:
If you were to factor this inequality the answer would be
-6(4p+15)
If you were to simplify this inequality the answer would be
-24p-90
I don't really know how your question is set up or how your teachers teach this but here are two possible answers. I hope this helps
HELP!!!! WILL MARK BRAINLIEST!!!!!!
Answer:
2sqaured + 24
Step-by-step explanation:
Write an equation in slope intercept form of the line that passes through the points (12, 15) and (9, 6). Show all work!!
PlSSSS HELPPPPP WORTH 60 POINTSS!
Answer:
2/5
Step-by-step explanation:
Answer:
y = 3x -21
Slope intercept form: y = mx + b
m (slope) = 3
B = - 21
Stay safe and Merry Christmas! :)
Which value completes the equation?
0 : 101 = 2.3
O A. 0.23
O B. 2.3
O C. 23
0 D. 230
PLEASE GET THIS RIGHT I HAVE IN F IN THIS CLASS PLSASE HELP
Answer:
C. 23
Hope your grade raises
Step-by-step explanation:
c
To make 1 batch of vegetable soup, Sam needs 16 ounces of water and 8 ounces of vegetables. How does the amount of water compare to the amount of vegetables?
Answer:
There is two ounces of water for every ounce of vegetables.
Step-by-step explanation:
Given that:
Sam needs 16 ounces of water and 8 ounces of vegetables to make 1 batch of vegetable soup.
Ratio is defined as the quantitative relation between two numbers.
We will use ratio to compare the amount of water to amount of vegetables.
Ratio of water to vegetables
16 : 8
Dividing by 8
[tex]\frac{16}{8}:\frac{8}{8}[/tex]
2:1
Hence,
There is two ounces of water for every ounce of vegetables.
Which equation has exactly 1 solution?
a
6-2x=4x
b
6x-2x=4x
c
4x=2(3x-x)
d
4x=2(2x-3)
Answer:
a
Step-by-step explanation:
6-2x=4x
-2x-4x= -6
-6x= -6/(-6)
x=1
the only one that has a number with out an x
Answer:
A and x=1
Step-by-step explanation:
HELP ASAP
suppose the fee is 7.5% of the selling price. determine the total cost of the game(fee included) original cost of the game is $76.
show your work
Answer:
Original Cost: $76
Fee: 7.5%
Take 7.5% of 76 (76 times .075) and add the result to the original amount $76
So, 76 times .075= 5.7
5.7+76= 81.7
Step-by-step explanation:
What is the value of x in the equation 6(x - 1) + 35 = 3x+29
Answer:
Step-by-step explanation:
6x-6+35 = 3x+29
6x - 3x = 29-29
3x = 0
x=0
Ralph went for a drive in his new car he drove at a speed of 62.5 miles per hour for 5 hours how many miles did he drive
Answer:
in step by step
Step-by-step explanation:
Distance problems are word problems that involve the distance an object will travel at a certain average rate for a given period of time.
The formula for distance problems is: distance = rate × time or d = r × t.
Things to watch out for:
Make sure that you change the units when necessary. For example, if the rate is given in miles per hour and the time is given in minutes then change the units appropriately.
It would be helpful to use a table to organize the information for distance problems. A table helps you to think about one number at a time instead being confused by the question.
Distance Problems: Given Total Time
Example:
John took a drive to town at an average rate of 40 mph. In the evening, he drove back at 30 mph. If he spent a total of 7 hours traveling, what is the distance traveled by John?
Solution:
Step 1: Set up a rtd table.
r
t
d
Case 1
Case 2
Step 2: Fill in the table with information given in the question.
John took a drive to town at an average rate of 40 mph. In the evening, he drove back at 30 mph. If he spent a total of 7 hours traveling, what is the distance traveled by John?
Let t = time to travel to town.
7 – t = time to return from town.
r
t
d
Case 1
40
t
Case 2
30
7 – t
Step 3: Fill in the values for d using the formula d = rt
r
t
d
Case 1
40
t
40t
Case 2
30
7 – t
30(7 – t)
Step 4: Since the distances traveled in both cases are the same, we get the equation:
40t = 30(7 – t)
Use distributive property
40t = 210 – 30t
Isolate variable t
40t + 30t = 210
70t = 210
210/70
Step 5: The distance traveled by John to town is
40t = 120
The distance traveled by John to go back is also 120
So, the total distance traveled by John is 240
Answer: The distance traveled by John is 240 miles.
help with number 6 please?
Answer:
64
Step-by-step explanation:
20 points
How many 1 /3 ounce servings are available in 6 ounces
Answer:
18 servings
Step-by-step explanation:
PLEASE HELP MY ASSIGNMENT IS DUE IN 3 HOURS!!!!
Answer:
76.3 degrees
Step-by-step explanation:
We use inverse cosine to find the angle.
arccos(1.9/8) = 76.26 deg
10 A daycare serves apple slices to children at lunchtime. The table below shows how
many apples were cut up and served each day of the week in relation to the number
of children in attendance.
M
T
W
Th F
Children 24
30
28
26
19
Apples
18
20
21
18
10
Is there a proportional relationship between the number of children and the number
of apples in this situation? Explain your answer and provide the constant of
proportionality if there is one.
Answer: No, there isn't a proportional relationship.
Step-by-step explanation: In these type of problems, always divide. For it to be proportional, the number of children/ apple slices should be the same for all days. But it isn't, the value differs.
Answer:
3:2 is the proportional relationship
Step-by-step explanation:
help please its timed
Answer:
pretty sure its c
Step-by-step explanation:
What is the range of the quadratic function graphed below?
Answer:
D.....
Step-by-step explanation:
all real number
PLEASE HELP FAST ILL GIVE BRIANLIST AND EXTRA POINTS!
What expression is equivalent to
Answer:
A
Step-by-step explanation:
Okay.
A negative exponent means we want to "flip" the term.
so we get
(1/-c^2)^1/3
When we get a fraction exponent, we want to "root" the term by that
so we get
[tex]\sqrt[3]{\frac{1}{-c^2} }[/tex]
Which simplifies to
[tex]\frac{\sqrt[3]{1} }{\sqrt[3]{-c^2} }[/tex]
Which becomes[tex]1/\sqrt[3]{-c^2}[/tex]
What is the solution to the system of equations below?
y= 1 x+6 and y-x-4
O (-8,2)
O (-8,-1)
O (8, 10)
O (8,-10)
Please help
Answer: a or b on edge
Step-by-step explanation:
It’s either those
What is diffusion
Explain how blood clots
When was the first world war fought
Answer:
Blood clotting normally occurs when there is damage to a blood vessel. Platelets immediately begin to adhere to the cut edges of the vessel and release chemicals to attract even more platelets. A platelet plug is formed, and the external bleeding stops.The First World War fought in July 28, 1914.Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration.
Step-by-step explanation: