Answer:
-8x² - 9x + 9
Step-by-step explanation:
(2x² - 5x + 1) - (10x² + 4x - 8)
2x² - 5x + 1 - 10x² - 4x + 8
2x² - 10x² - 5x - 4x + 1 + 8
-8x² - 9x + 9
There are 40 students in a class. Boys makeup 40% of the class. If 25% of the boys wearshirt jacs, how many boys wear shirt jacs?
Answer:
6
Step-by-step explanation:
Find out how many boys makeup the class.
100% = 40
1% = 40 ÷ 100 = 0.40
40% = 0.40 x 40 = 16
Find 25% of the class.
25% = 0.40 x 25 = 10
40 - 25 = 15% of the boys wear shirt jacs.
16 - 10 = 6
Se sabe que el virus SARS-CoV-2 es de forma aproximadamente esférica cuyo diámetro del virus se ha encontrado para colocar entre 50 nanómetro a 140 nanómetro. Halle la dimensión para dicho volumen a) L2T b) L3 c) L4 d) ML3
Answer:
L³
Step-by-step explanation:
De la pregunta anterior se nos dice que el diámetro del virus esférico
= 50 - 140 millas náuticas
Radio = 50 - 140 nm / 2
= 25 - 70 millas náuticas
El volumen de una esfera es
= 4/3 πr³
Usando el análisis dimensional
4/3 = constante
π = constante
[r] = Dimensión de longitud = L
Por lo tanto, la dimensión del volumen de la esfera = L³
i need help please! will mark brainliest
Answer:
g= - 3x/x-2
Step-by-step explanation:
The American antelope (pronghorn) and the wildebeest are among the fastest mammals on the planet,
particularly at running long distances. The maximum recorded speed for the antelope is 88.5 km/h, which it
can sustain for nearly one kilometer.
On the other hand, the distance, d, in kilometers that the wildebeest can run in t hours is given by the equation
d=80.5t
Assuming both animals are running at constant speeds, which animal can run faster?
Choose 1 answer:
The American antelope
B
The wildebeest
They can run at the same speed.
Answer:
The Wildebeest
Step-by-step explanation:
I’m guessing
Answer:
Correct answer is a
Step-by-step explanation:
Which expression(s) are equivalent to the given expression?
6x - 18y + 36
A 2(3.2 - 9y + 18)
B 3(2x - 6y +12)
c|4(2x - 14y + 32)
D 6(2-3y +36)
E9(6x - 2y + 4)
Answer:
B
Step-by-step explanation:
You just need to multiply the first number by every number in the parantesis Take care bby :)))
Answer:
B
Step-by-step explanation:
B: 3x2x= 6x
3x6y= 18y
3x12=36
If there's more I apologize but that is all that I could find.
A trapezoid has been rotated 90°
clockwise about the origin. Is it true that
the y-coordinates of the new trapezoid
are the same as the y-coordinates of the
original trapezoid? Explain.
Answer:
yes
Step-by-step explanation:
counterclockwise move it to the quadrant
directly to the left ,which is the second quaurter that means the x value only become negtive
Answer:
90 degree rule
(x,y)=(y.-x)
Step-by-step explanation:
Tatum walks her dog 2/3 mile every day after school. How many miles does she walk her dog in 5 days
The number of miles that Tatutm walk her dog in 5 days is given by: Option B: 10/3 (in miles)
How to add two fractions?Let we have to add two fractions as:
[tex]\dfrac{a_1}{b_1} + \dfrac{a_2}{b_2}[/tex]
Then we will find Lowest Common Multiple (LCM) of [tex]b_1[/tex] and [tex]b_2[/tex]. That will help to make the denominators same.
Once the denominators become same, the numerators can add up directly, giving us the final result of addition.
For this case, we're given that:
Each day, Tatum walks her dog 2/3 milesFor 5 days, the total distance her dog walked = 2/3 + 2/3 + 2/3 + 2/3 + 2/3
Since denominators are same, thus:
[tex]\dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} = \dfrac{2+2+2+2+2}{3} = \dfrac{10}{3}[/tex]
We could've easily done it as: 2/3 + 2/3 + 2/3 + 2/3 + 2/3 = 5 times 2/3 = [tex]5 \times \dfrac{2}{3} = \dfrac{5 \times 2}{3} = \dfrac{10}{3}[/tex]
Thus, the number of miles that Tatutm walk her dog in 5 days is given by: Option B: 10/3 (in miles)
Learn more about fraction addition here:
https://brainly.com/question/17544795
plis help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Equation: 2x + 1 = 9x - 13
There are two chairs in each row.
Step-by-step explanation:
Looking at the problem, we see that Hue can form two rows of chairs with 1 left over, or 9 rows if she gets 13 more. With that information we can create the equation 2x + 1 = 9x - 13. Now let's solve for x.
2x + 1 = 9x - 13
What we can do first is subtract 9x from both sides. This is done so all of the variables are on one side. Thus that becomes...
2x + 1 - 9x = -13
Now, combine -9x and 2x to get -7x.
-7x + 1 = -13
Now subtract 1 from both sides. This is done so we solve for x directly.
-7x = -13 - 1
Subtract -1 from -13 to get -14.
-7x = -14
Now divide both sides by -7.
x = -14/-7
Divide -14 by -7 to get 2. Remember, dividing two negatives gives you a positive!
x = 2
With that, the equation is solved. There are 2 chairs in each row.
A gaming system is regularly priced at $165. It is on sale
this week for $132. What is the percent decrease in the
price of the gaming system?
PLSSS HELPPP
Answer:
The gaming system was on sale for 20% off
Step-by-step explanation:
165 - 132 = 33
Now, we need to find what percent 33 is of 165.
(33/165) x 100 = 20%
420 student 25 times 3 times the number of girls 2 times the number of boys how many girls amd how many boys
Complete Question
We have a total of 420 students. 2 times 3 times the number of girls is equal to 2 times the number of boys how many girls and how many boys
Answer:
The number of boys = x = 315 boys
The number of girls = y = 105 girls
Step-by-step explanation:
Let
The number of boys = x
The number of girls = y
We have 420 students
2 times 3 times the number of girls is equal to 2 times the number of boys
x + y = 420..... Equation 1
2 × 3y = 2x
6y => 2x
x => 6y/2 = 3y
We substitute 3y for x in Equation 1
3y + y = 420
4y = 420
y =>420/4
y => 105
Solving for x
x = 3y
x = 3 × 105
x = 315
Therefore,
The number of boys = x = 315 boys
The number of girls = y = 105 girls
Find the midpoint of the segment with the following endpoints.
(−9,2) and (−5,−6)
Answer:
(-7, -2)
Step-by-step explanation:
what is 5% of 3200? Plz help bro
calculate the mean deviation for the number 75 85 96 100 121 125
Answer:
i got 15.1
Step-by-step explanation:
 What is the mathematical term for "the same"?
Answer:
Equivalent / Equal
Step-by-step explanation:
simply 7/4 squared
Answer:
0.4375
Step-by-step explanation:
What is the slope of the line given by the equation y = 12x?
Answer:
up 12 over 1
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
12 is before x and the b or y-intercept is 0
Hope it helps have a good day
what expression is equivalent to (3^2)^-2
Answer:
1/81
Step-by-step explanation:
You just tap the calculator
Raquel’s favorite basketball player scored 25, 17, 38, 11, and 24 points during her games.
What is the mean number of points the player scored?
Answer:
23 points
Step-by-step explanation:
Parallel lines G and H are shown in one grid and parallel lines K and J are shown on the other grid
please help
9514 1404 393
Answer:
B reflected over y, translated up
Step-by-step explanation:
The left-right reversal means there was a reflection over a vertical line. The only one among the offered choices is the y-axis.
If the lines are reflected over the y-axis, the points on the y-axis don't move. The intercepts would still be 2 and 5 after the reflection.
However, the y-intercepts have moved up 3 units to 5 and 8.
Lines g and h were reflected over the y-axis and translated up 3 units.
A. What is the perimeter of the rectangle?
B. What is the area of the rectangle?
Answer:
A) perimeter = 3 + 3 + 8 + 8 = 22 units
B) area = 3 x 8 = 24 units²
Step-by-step explanation:
What is the distance between (2,3) and (-2,7)? Round to the nearest tenth
Answer:
Step-by-step explanation:
distance = [tex]\sqrt{(7-3)^2+(-2-2)^2[/tex] = [tex]\sqrt{16+16} = \sqrt{32}[/tex], which is approximately 5.65685
Answer:
5.7
Step-by-step explanation:
[tex] \sqrt{(2 + 2) {}^{2} + (3 - 7) {}^{2} } = \sqrt{ {4}^{2} + {4}^{2} } = \sqrt{16 + 16} = \sqrt{32} = 4 \sqrt{2} = 5.7[/tex]
ella deposits $8000 into an account that pays simple interest at a rate of 3% per year. How much interest will she be paid in the first 4 years?
PLEASE HELP
Answer:
(a+b)^2+(a-b)^2=2(a^2+b^2)
expanding:
a² + 2ab + b² + a² -2ab + b² = 2a² + 2b²
2a² + 2b² = 2a² + 2b²
Answer:
with what?
Step-by-step explanation:
The ratio of cars to trucks in a parking lot was 5:2. The ratio of trucks to bicycles in the parking lot was 1:4. If there were 20 cars in the lot, how many bicycles were in the lot
Answer:
16 bicycles
Step-by-step explanation:
If (-3)^-5=1/x, what is the value of x?
options are in the photo
Answer:
X= -243
Used Math.way
What is the slope of the line shown below?
10
A. 6
ОО
(-0,3) 6
B.
10
16
c
D. 6
101
SOMEONE HELP please!!!! *ill mark brainliest
Answer:
-12 degrees
Step-by-step explanation:
the graph
the fastest 3 runners in a race qualify for the next event. how many different groups of Runners could advance to the next event from a race that has seven runners
Answer:
35 different groups of 3 runners can be selected
Step-by-step explanation:
Here, we want to simply calculate the number of 3 runners that can advance in a race from a total of 7
What we want to do here is to simply get different groups of 3
So, we have it that we simply want to know the number of different ways we can select 3 from a total of 7
We can simply use combination for this;
We have the general combinatorial as;
nCr = n!/(n-r)!r!
With respect to this particular question, n = 7 and r = 3
So we have;
7C3 = 7!(7-3)!3! = 7!/(4)!3! = 35
2x-y=8
x+2y=4
for the system of equation above, what is the value of x+y?
Answer:
4
Step-by-step explanation:
2x-y=8 ---> y= 8-2x
substitute y=8-2x into x+2y=4
x + 2(8 - 2x) = 4
x + 16 - 4x = 4
-3x = -12
x = -12/-3
x = 4
substitute x=y into y=8-2x
y = 8 - 2(4)
y = 8 - 8
y = 0
therefore,
x+y= 4+0
4
btw i like ur jimin pfp besty :)
Q1. Edward drove 80 miles from his home to London. He stopped and visited his friend Nicola on the way. Here is the distance-time graph for the journey.
80
60
a) How far was Edward from home when he visited Nicola.
b) How long did Edward stop for?
Distance from home (miles)
40
20
09:00
10:00
11:00
Time of day
12:00
13:00.
Plz steps
Answer:
a) 40
b)1h30m
Step-by-step explanation:
a) from graph
b) from 10:00 to 11:30 is 1h30min