Answer:
r = -21
Step-by-step explanation:
-2(r + 9)
-2 (-21 + 9)
-21 + 9 = -12
-2(-12)
= 24
Answer:
-21
Step-by-step explanation:
Detailed explanation:
24 = -2(r + 9)
First, I did distributive property
24 = -2r -18
Now I will add 18 to both sides
42 = -2r
Now I will divide both sides by -2
-21 = r
Please give Brainliest if you find this useful.
An equation was created for the line of best fit from actual enrollment data. It was used to predict the dance studio enrollment values shown in the table:
Enrollment Month
January February March April May June
Actual 500 400 550 550 750 400
Predicted 410 450 650 650 600 450
Residual 90 −50 −100 −100 150 −50
Analyze the data. Determine whether the equation that produced the predicted values represents a good line of best fit.
No, the equation is not a good fit because the sum of the residuals is a large number.
No, the equation is not a good fit because the residuals are all far from zero.
Yes, the equation is a good fit because the residuals are not all far from zero.
Yes, the equation is a good fit because the sum of the residuals is a small number.
Answer:
Step-by-step explanation:
If m<10=60 degrees and m<11=81 degrees, find M<7.
I don't know the steps to do it, someone?
Answer:
99
Step-by-step explanation:
because m<11 equals 81 so 180 - 81 = 99.
Check the picture below.
12. Convierte estas fracciones impropias en números mixtos:
A. 15/7=
B. 16/6=
C. 12/5=
D. 48/7
Por favor.
¡Hola! Voy a hacer el mismo proceso para cada uno.
Primero, restaré el denominador del numerador hasta que sea una fracción propia. También simplificaré si es necesario.
Luego, "volveré a sumar los números enteros al número" como un número mixto.
A. 15/7
[tex]\displaystyle \frac{15-7-7}{7} =\frac{1}{7}[/tex]
[tex]\displaystyle \frac{1}{7}+1+1=[/tex]
[tex]\displaystyle 2\frac{1}{7}[/tex]
B. 16/6
[tex]\displaystyle \frac{16-6-6}{6} =\frac{4}{6}=\frac{2}{3}[/tex]
[tex]\displaystyle \frac{2}{3}+1+1=[/tex]
[tex]\displaystyle 2\frac{2}{3}[/tex]
C. 12/5
[tex]\displaystyle \frac{12-5-5}{5} =\frac{2}{5}[/tex]
[tex]\displaystyle \frac{2}{5}+1+1=[/tex]
[tex]\displaystyle 2\frac{2}{5}[/tex]
D. 48/7
[tex]\displaystyle \frac{48-7-7-7-7-7-7}{7} =\frac{6}{7}[/tex]
[tex]\displaystyle \frac{6}{7}+1+1+1+1+1+1=[/tex]
[tex]\displaystyle 6\frac{6}{7}[/tex]
Which of the following statements about the drawing are true? Angle 1 is an acute angle. The measure of angle 1 is 90°. The lines are perpendicular. Angle 1 is a right angle.
Main idea: Experimental and theoretical probability
1. Fill in the blanks to compare experimental and theoretical probability.
If you know all of the possible outcomes of a trial, and all outcomes are equally likely, you can calculate the _______________ probability of a certain event.
The theorical probability of a coin landing on heads is _____%.
You can estimate probability by doing an _______________.
Experimental probability is also called _______________ probability.
2. Fill in the blanks to describe using probability experiments to estimate an unknown probability.
To estimate an unknown probability, _______________ the number of successful trials by the _________________________ of trials.
The more trials you perform, the more _______________ the _______________ tends to be.
3. Complete the steps to show how to estimate probabilities by repeating trials.
4. Anna does not know what colors of blocks are in a bag. She selects a block out of the bag, records its color, and replaces it in the bag. She repeats the process for a total of 50 trials, and then summarizes her data. Find P(yellow), the probability of choosing a yellow block.
Color
Green
Blue
Yellow
Number
18
22
10
Identify successful outcomes as choosing a _______________ block.
Of the 50 trials, _____ were successes.
Based on the data, the estimated probability of choosing yellow is _____. In simplest form, P(yellow) = _____.
Main idea: Conducting experiments
5. Complete the steps to estimate probabilities based on experimental data for this problem.
Marci made a 10-sided object and wrote a number from 0 to 9 on each face. She is not sure all the sides are equal in size, so she doesn't know the probability of rolling each number.
The sample space:
This tally table shows the data Marci collected from 10 rolls of her 10-sided object. Each mark represents one roll of that number. Fill in the estimated probability for each event based on the data after 10 rolls.
Estimated probabilities after 10 rolls
Rolled a:
0
1
2
3
4
5
6
7
8
9
Number of times
Probability
This table shows the data Marci collected from 100 rolls of her 10-sided object. Fill in the estimated probability for each event based on the data after 100 rolls.
Estimated probabilities after 100 rolls
Rolled a:
0
1
2
3
4
5
6
7
8
9
Number of times
6
14
7
13
9
11
8
12
11
9
Probability
Main idea: Estimating probability with relative frequency
6. Barry made four out of five free throws. Complete the table and answer the questions about the relative frequency of free throws made.
Free throws made
Free throws tried
Relative frequency
What is the estimated probability that Barry will make his next free throw? How likely is he to make the shot?
7. Complete the sentences to describe using relative frequency tables to estimate probability.
The probability of an event can be estimated by finding the ____________________ of the event.
The relative frequency is the number of times a(n) _______________ occurs divided by the number of observations.
Main idea: Using probability to approximate frequency
8. Tamara and her sister play a game using a spinner. A typical game involves 136 spins. The probability of spinning each color is . About how many times should Tamara expect the spinner to land on yellow? Let x represent the number of times the spinner lands on yellow.
BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!
Jake made a rectangular garden area as shown in the figure. He wants to add 3 inches of topsoil to the entire area.
A rectangle has a length of 36 inches and height of 15 inches.
How much topsoil does Jake need to get at the nursery?
540 in.3
1,080 in.3
1,386 in.3
1,620 in.3
and if you can please answer some of my other questions
Please Help ASAP!!!! (will give brainliest) ^^
Answer:68.921
Step-by-step explanation:
its S^3
SO SIMPLY
[tex]4.1^{3}[/tex]
a circle is drawn within as shown. what is the best approximation for the area of the shaded region? use 3.14 for pie
Answer:
7536 espero que te ayude
What is the mode of the data represented in this line plot?
Enter your answer in the box.
Type a digit that makes this statement true.
2,748,40 is divisible by 4.
Submit
Find a Job !!20 POINTS!!
Directions: Calculate which job is the best option financially. (Problems in photo)
Show Work! This is part of my almost finished final! Please help!
HELP PLEASE I NEED HELP
Answer:
9-2=7
Step-by-step explanation:
The range of a data set is the maximum (highest) value/number subtracted from the minimum (lowest) value. So to find the range of this data set, you subtract the largest number 9 by 2 to get the range of 7.
pls answer I will mark brainliest
Answer: The answer is 36ft³, or 2916ft.
50 POINTS
A pencil at a stationery store costs $1, and a pen costs $1.50. Shawn spent $12 at the store. He bought a total of 9 items. Which system of equations can be used to find the number of pencils (x) and pens (y) he bought?
a
1.5x + y = 12
x = 9y
b
x + 1.5y = 12
x + y = 9
c
x + 9y = 12
x = 1.5y
d
9x + y = 12
x = 1.5y
Answer:
The answer is B
Step-by-step explanation:
Only Logical Answer here
Fill in the blank to make the statement true.
1 3 over 4 space plus space 1 over 6 space plus ________ equals space 7 1 half
Answer: x= 385/12
Step-by-step explanation:
You would first change the denominator to some number that is common. Then combine the like terms. Lastly, subtract the fraction from the equal and you get your x.
[tex]\frac{13}{4} +\frac{1}{6} +x=\frac{71}{2} \\(\frac{39}{12})+(\frac{2}{12})+x=\frac{426}{12} \\\frac{41}{12}+x=\frac{426}{12} \\x=\frac{385}{12}[/tex]
HELP ME PLEASE!!
REMEMBER TO SHOW ALL WORK
THANK YOU!!
I have no clue what this is and I’m gonna get a zero if I don’t finish this. [its literally the last assignment I have for the year]
Find the surface area if the regular pyramid
Answer:
170.1 yd^2
Step-by-step explanation:
In picture attached
Answer:
205.2
Step-by-step explanation:
First get the area's of the 3 triangles on top of the base, the formula is base x height divided by 2
10 x 9 = 90
90 / 2 = 45
Multiply the area of the 3 sides together :
45 x 3 = 135
Now find the area of the base triangle :
9 x 7.8 = 70.2
To find the surface area of the ENTIRE shape you have to add all the sides :
135 + 70.2 = 205.2
A helicopter takes off from ground level and rises to a cruising elevation. The pilot descends to ground level, picks up a reporter, and transports her to a helipad on top of a building. Which graph shows the height of the helicopter over time? HElp pleasee please correct answer
Answer and step-by-step explanation:
starting at ground level means the helicopter starts at the bottom, works its way up to a cruse, then drops to ground level then goes to the top of a building meaning it would look up-and-down like
this graph should be the one you're looking for
hope this helps:)
Brainlist to the right answer :)
8th grade linear functions, will give brainliest if the steps are listed and explained :)))
Get the slope of the line using the two known points:
slope = (7 3/4 - 6 1/4) / (1 1/4 - 3/4) = (1 2/4) / (2/4) = 3
Use the point-slope formula for a line to get the equation of the line. You can use any of the known points and the slope computed above. For example,
y - 6 1/4 = 3 (x - 3/4) ⇒ y = 3x + 16/4 = 3x + 4
Then for some given value of x, the third point has y-coordinate 3x + 4.
"Which values" suggests there may be more to the question, namely some list of answer choices. If you have something like that, just check if the above condition is met.
Without doing any calculations, compare expression A to expression B.
56 × 250 ( 13 × 250 ) + ( 12 × 250 )
Choose the words to complete the comparison.
Expression A is __________ expression B.
A. less than
B. greater than
C. equal to
A point is missing from the graph of the relation below. The relation is not a function.
help please give right answer
How is finding the area of composite two-dimensional figures similar to finding the surface area of three-dimensional figures?
Answer:
If you find the area of a 2D shape (ex-square) you would multiply the area by the amount of faces with the shape (that are the same shape)
I N E E D HELPPPPPPPPP its math 30 points pls help!
Answer: in order of question boxes presented
3 = weekly rainfall in seattle = 1200 cm
1 = weekly rainfall in portland and how much = week 3 and 800
2 = flavor ice cream girls prefer over boys = chocolate, strawberry and cookies and cream
edited to correct #1
i apologize its hard to see the graphs on iphone
Step-by-step explanation:
identified answer from graphs given
22,064 ÷ 394 equals what?
Answer:
the correct answer is 56
Step-by-step explanation:
22064÷394=56
The solution is : 22,064 ÷ 394 equals 56.
Here, we have,
given that,
22,064 divided by 394
Given the following mathematical expression;
22,064 / 394
We would apply the law of division for fractions.
22,064 / 394
= 22,064 ÷ 394
= 56
the result of the division.
Hence, The solution is : 22,064 ÷ 394 equals 56.
To learn more on division click:
brainly.com/question/21416852
#SPJ6
Field Trip Cost !!20 POINTS!!
Your principal has chosen you to help him/her to determine the cost of each part of the field trip. You must use your knowledge of solving equations in order help your principal out. Please help ASAP
Answer and work in the picture.
I did not understand q.2, so I left it blank.
Hope this helps!
what is the measure of angle 7?
suppose the measure of angle 6 can be represented be (2x-5). what equation can be written to solve the value of x?
what is the value of x?
Answer:
<7 = 47, 2x - 5 + 47 = 180, x = 69
Step-by-step explanation:
<5 and <7 are vertical angles, which means that they have the same degree.
<7 + <6 = 180. <6 = 2x - 5. 2x - 5 + 47 = 180.
Solve
2x - 5 + 47 = 180
2x + 42 = 180
2x = 138
x = 69
The two dot plots below compare the forearm lengths of two groups of schoolchildren:
Based on the visual inspection of the dot plots, which group appears to have the longer average forearm length?
A. Group A, because a child in the group has the least forearm length of 10 inches.
B. Group A, because four children have a forearm length longer than 12 inches.
C. Group B, because no child in the group has a forearm length longer than 12 inches.
D. Group B, because five children in the group have the least forearm length of 10 inches.
Dalton got 15 notebooks for $1.75 each and 1 marker for $1.59.
Answer:
15 x 1.75 + 1.59
Step-by-step explanation:
Dalton spent $26.25 on the notebooks, along with $1.59 for one marker; adding up to a $27.84 total.
Answer:
$27.84
Step-by-step explanation:
Given :
⇒ 15 notebooks for $1.75 each
⇒ 1 marker for $1.59
==============================================================
Solving :
⇒ Total cost = 15 × 1.75 + 1.59
⇒ Total cost = 26.25 + 1.59
⇒ Total cost = $27.84