Answer:
n=−2
Step-by-step explanation:
Let's solve your equation step-by-step.
3(n−5)=−21
Step 1: Simplify both sides of the equation.
3(n−5)=−21
(3)(n)+(3)(−5)=−21(Distribute)
3n+−15=−21
3n−15=−21
Step 2: Add 15 to both sides.
3n−15+15=−21+15
3n=−6
Step 3: Divide both sides by 3.
Answer: n= -2
Step-by-step explanation:
3(n−5)=−21
Divide both sides by 3.
n−5=
3
−21
Divide −21 by 3 to get −7.
n−5=−7
Add 5 to both sides.
n=−7+5
Add −7 and 5 to get −2.
n=−2
Please Help, thank you :)
Answer:
p=-13
-13+16=3
The event coordinator asks you to determine how many students participated in the track-and-field day. The total number of students in seventh and eighth grade combined is 584; "5" /"8" of them are seventh graders and "3" /"8" of them are eighth graders. If "4" /"5" of the seventh graders participated in track-and-field day and "7" /"8" of the eighth graders participated, about how many total students participated? Describe the process you used to find your answer.
Given that, the total number of students in seventh and eighth grade combined is 584.
The number of students in seventh grade= 5/8 of the total number of students.
[tex]=\frac 5 8 \times 584=365[/tex]
As 4/5 of the total seventh-grade students participated in the track-and-field-event.
So, the number of seventh-grade students participated
[tex]= \frac 4 5 \times 365=292[/tex]
The number of students in the eighth grade 3/8 of the total number of students.
[tex]=\frac 3 8 \times 584=219[/tex]
As 7/8 of the total eighth-grade students participated in the track-and-field-event.
So, the number of seventh-grade students participated
[tex]= \frac78 \times 219=191.625.[/tex]
The number of students must be a counting number, but here, as per the given information, the number of seventh-grade students participated coming out a fractional number, so the given information is incorrect.
Although, as per the given data, the mathematical value of the total number of students participated from both the grade combined
=292+191.625
=483.625 (mathematically)
Again, in real life, the fractional value of the total number of students is not possible.
Answer:
Given that, the total number of students in seventh and eighth grade combined is 584.
Step-by-step explanation:
Jack's family left home at 9:00 AM and drove to the amusement park at 60 mph. They spent 7 hours at the park and then drove back home. On the way home, traffic was bad and they drove 20 mph slower than in the morning. They got home at 8:00 PM. How far is the amusement park from Jack's home?
Answer:
96
Step-by-step
the distance from the amusement to jack's home is x (mile, x>0)
jack's family went to the amusement park at: 9 + x/60
On the way home, traffic was bad and they drove 20 mph slower than in the morning⇒ they drove: 60 - 20 = 40 mph
they left the amusement park at: 20 - x/40
have the following equation:
(20 - x/40) - (9+ x/60) = 7
⇔ 4 = x/40 + x/60
⇔ x = 96
so the distance from the amusement park to jack's home is 96 mile
Distance of amusement park from Jack's home = 96 miles
Let the distance from Jackie's house to the amusement park be x.She drove at a speed of 60 mph to get to the amusement park.
Now, formula for time is;Time = distance/speed
Time; t1 = x/60 hours
Now, we are told she spent 7 hours at the park. Thus; t2 = 7 hoursOn her way back home from school, we are told she drove 20 mph slower than her speed in the morning. Thus, speed = 60 - 20 = 40 mphThus; time; t3 = x/40
Now, she left home by 9 am and got home by 8pm same day. This is a total of t = 11 hoursThus;
t1 + t2 + t3 = 11
Plugging in the relevant values;
(x/60) + 7 + (x/40) = 11
Rearrange to get;
(x/60) + (x/40) = 11 - 7
(x/60) + (x/40) = 4
Multiply through by 120 to get
2x + 3x = 480
5x = 480
x = 480/5
x = 96 miles
Read more at; brainly.in/question/3442867
Which is greater
4.87 x 109 or 9.212 x 1087
Answer:
9.212 x 1087
Step-by-step explanation:
9.212 x 1087=10013.444
4.87 x 109=530.83
Answer:
The seconds one
Step-by-step explanation:
It equals more
Question 4 Multiple Choice Worth 1 points)
(04.02 LC)
What is the solution to the following system of equations?
X - 3y = 5
2x + y = 10
(5,0)
(0,5)
(7,0)
(0,7)
Answer:
( 5, 0 )Step-by-step explanation:
x - 3y = 5
2x + y = 10 multiply by 3 to eliminate y and solve for x
x - 3y = 5
6x + 3y = 30 then add
7x = 35
simplify:
x = 35 / 7
x = 5
substitute x = 5 back into the eq.2
2x + y = 10
2(5) + y = 10
y = 10 - 10
y = 0
therefore the answer is ( 5, 0 )
A purse contains a collection of quarters, dimes, nickels, and pennies. The average value of the coins in the purse is 17 cents. If a penny is removed from the purse, the average value of the coins becomes 18 cents. How many nickels are in the purse?
Answer:
There are total of 17 coins in the purse
Step-by-step explanation:
Let x represent the no of coins in the purse
Let y represent the total amount
y/x = 0.17
y = 0.17*x............................(i)
y-0.01 / x-1 = 0.18
y - 0.01 = 0.18x -0.18........(ii)
We substitute y = 0.17 x into the second equation:
0.17x - 0.01 = 0.18x - 0.18
0.17 = 0.01x
x = 17
Hence, there are total of 17 coins in the purse
A scientist receives a grant for $8,860,000. The
laboratory needs $12,000,000 for new renovations. How
much more money does the laboratory need for new
renovations? Write your answer in scientific notation.
Someone please help I need help!
Answer:
3140000
Step-by-step explanation:
12,000,000 - 8860000
Which ratio is different from the others? > 8 to 15 ,15:8 ,8:15 8/15
Triangle ABC is given by the points A(−1, 5), B(0, 3), and C(2, 4). It is reflected over the line y = −2x − 2. Does the image contain each of the points? Select Yes or No for A-C.
1. A' (-5,3) Yes or No
2. B' (-4,6) Yes or No
3. C' (-6,0) Yes or No
Please help!
Answer:
1.A'(-53) yes
2. yes
3 no
construct a 45-45-90 degree triangle with leg equal to AB
The required 45-45-90 degree triangle is shown, where each of the two acute angles is 45 degrees and the length of the hypotenuse is equal to the length of each leg multiplied by the square root of 2.
What is the right-angle triangle?A right-angled triangle, also known as a right triangle, is a triangle in which one of its interior angles measures exactly 90 degrees. The side opposite the right angle is called the hypotenuse, and the other two sides are called the legs.
Here,
o construct a 45-45-90 degree triangle with leg AB, we can follow these steps:
The resulting triangle will have sides AB, BC, and AC, where AB and BC are equal in length and AC is the hypotenuse.
Learn more about right-angle triangles here:
https://brainly.com/question/3770177
#SPJ2
Solve for x.
12x − 6 = − ( 18x + 11 )
A. 6
B. -6
C. 1/6
D. -1/6
Answer:
D
Step-by-step explanation:
12x - 6 = -18x - 11
12x + 18x = -11 + 6
30x = -5
x = -1/6
The number of students in a chess club decreased from 40 to 19. What is the percent decrease? Round your answer to the nearest percent.
The percent decrease is
%.
A new student at Malden High School started the year with 2 friends . This number doubles every week.
Answer:
Thats not a proper question
Step-by-step explanation:
20. Rectangle ABCD is transformed to create rectangle EFGH. What sequence of
transformations maps one to the other? Select all that apply.
a. Reflect over the y-axis, then reflect over the x-axis
b. Rotate 180° about the origin, then translate up 4 units
c. Translate down 4 units, then rotate 180° about the origin
d. Translate 4 units to the right, then rotate 180° about the origin
Answer:
B
Step-by-step explanation:
rotate 180 --> translate up by 4: (x,y)--> (-x,-y) --> (-x,-y +4)
12 divided by 3 +6 times 2 simplified
Answer: I believe the answer is 16 hope this helps
Step-by-step explanation:
Step-by-step explanation:
3 + 6 = 9
9 x 2 = 18
12/18 = 0.66 repeating
0.66 repeating >> simplified >> 2/3
**Please mark brainliest :))
help me pleaseeeeeeeo
Answer: x=-2
Step-by-step explanation:
First subtract 4 from both sides
Sqrt(x+3)=1
Then square both sides
X+3=1
Then subtract 3
X=-2
Hope this helps!
Answer:
mmm x = -2 and put -2 over the square root on your calculator
Step-by-step explanation:
I hope this is right lol
Which is the minimum or maximum value of the given function?
A.
The function has a minimum value of -4.
B.
The function has a maximum value of -4.
C.
The function has a maximum value of -3.
D.
The function has a minimum value of -3.
Answer:
The function has a minimum value of -4.
Step-by-step explanation:
i got it right
TARGET TAS
The average American household spends about $40,000 each year. If there are about 1 x 10 households, what is the
total amount of money spent by American households in one year? Write your answer in scientific notation and
standard form.
∵Brainliest for the first right answer ∵
Answer:
D. 0.42 divided by 7
Hope this helps! Please mark Brainliest!
Answer:
D. is correct
Step-by-step explanation:
I took the test
if y is directly proportional to x and y = 56 when x = 8 what is the value of y when x = 13
Answer:
y=91
Step-by-step explanation:
if x=8 when y=56,we can make a formula like this(y=7x) &then we can solve easly
y=7x
y=7*13
y=91
i hope helps you
"If x = y, then x + 4 = y + 4" represents the
property of equality.
OA) substitution
B) subtraction
C) addition
D) transitive
Answer:
C
Step-by-step explanation:
Look in your old textbooks
choose all the numbers that are factors of 16
A. 2
B. 16
C. 3
D. 4
E. 8
F. 12
G. 6
H. 5
I. 10
J. 1
Tommy is travel to see his aunt. He drives for 40 minutes for 1280 miles, how fast was Tommy driving?
Answer:
1280/40=32
Step-by-step explanation:
Answer:
speed = 32 miles per hour
= 32 mi/h
A square patio has a perimeter of (8x + 28) feet. What is the length of the patio?
what is the answer to 10 x 102
Answer: 1,020
Step-by-step explanation:
Please help legit things only or you get banned thanks!!!!!!!!!!!!!
Seema used compatible numbers to estimate the product of (–25.31)(9.61). What was her estimate?
–250
–240
240
250
Answer:
it is a becouase if you estimate (–25.31) to -25 and 9.61 to 10 / 25x10 would be 250 since -25.31 was negative it would be option A or -250
Step-by-step explanation:
The composition of transformations always results in the lengths of segments of the pre-image and image remaining equal. (True or False)
Answer:
False.
Step-by-step explanation:
In translation, rotation and reflections there is no size change but in dilation the size of the pre-image changes.
So, it is false.
the us air force has 19 women for every 81 men enlisted.what is the ratio of men to women
Answer: 81 to 19
Step-by-step explanation:
Which expression could be used to determain the cost of a $40 video game aftera 15 percent discount
Answer:
$34
Step-by-step explanation:
40*.15
=6
40-6
=34