Answer:
The correct answer is:
Error made: The student multiplied only corresponding terms in each bracket with each other
Correction: Each term in one bracket is to be multiplied with every term in the next bracket
Step-by-step explanation:
The student paired the terms in the brackets into like terms and multiplied the like terms like this:
(2x + 2) × (4x - 1)
collecting like terms: (2x, 4x) (2, -1)
(2x × 4x) (2 × (-1)) = 8x² - 2.
The above is the wrong way of expanding the bracket. The correct way of doing it is as follows:
(2x + 2) (4x - 1)
Each term in one bracket multiplies each term in the second bracket.
= 2x (4x - 1) + 2(4x -1)
= 8x² - 2x + 8x - 2
= 8x² + 6x - 2
Translate triangle ABC 4 units right and 5 units down H E L P
Roadsign cast of shadow that is 4 feet tall at the same time a 6 foot man standing next to the sign cast a shadow of those 2.4 feet long right and solve a proportion to find how tall the sign is
Answer:
10 feets
Step-by-step explanation:
Given that:
Road sign shadow (Rs) = 4 feets
Height of man (Hm) = 6
Man shadow (Ms) = 2.4 feets
Height of road sign (Hr) = x
Height of road sign / shadow of road sign = height of man / shadow of man
Hr/Rs = Hm / Ms
x / 4 = 6 / 2.4
Cross multiply :
4*6 = 2.4*x
24 = 2.4x
x = 24 / 2.4
x = 10 feets
Hence, height of road sign = 10 feets
find lowest common factor multiply of 12 and 36
Answer:
12
Step-by-step explanation:
please help meeeee and show your work :)
Answer:yes because the slopes od the lines are the same but the y intercepts are differen.
Step-by-step explanation:
when you connect (5,8) and (13,24) then (3,3) and (7,11) they insect what the the lines. so C yes because the slopes of the lines are the same but y intercepts are different
PLEASE HELP DUE IN 1 HOUR :( I WILL GIVE CROWN TO BEST ANSWER
Ken is using tiles to cover a 6-foot by 3-foot section of a floor.
A. If he uses 1-foot square tiles, how many will be in each row of tiles?
B. How many rows of tiles will he use?
C. How many tiles will he use to cover the whole section?
PLEASE ANSWER
The team bus is carrying 15 players. Only
sophomores, juniors, and seniors are on the team bus.
There is one more sophomore than juniors. The
number of seniors is one more than the sum of the
number of juniors and sophomores. How many juniors
are there?
Answer:
there are 3 Juniors, 4 sophomores and 8 seniors
Find FD(round to the nearest tenth) please and thank you!
Answer:
FD = 25.9
Step-by-step explanation:
13x - 16 = 4x + 11
9x = 27
x = 3
using Pythagorean theorem:
FD² = 12² + [4(3) + 11]²
FD² = 144 + 23² = 144 + 529 = 673
FD = 25.94
Qual é o comprimento do arco correspondente a um ângulo ao centro de 45 graus, numa circunferência de raio 3 cm ?
Answer:
2.4 m
Step-by-step explanation:
A fórmula para o comprimento do arco é dada como:
Comprimento do arco = 2πr (θ / 360)
Onde r = raio = 3cm
θ = Ângulo em graus = 45 °
Comprimento do arco = 2 × π × 3 (45/360)
Comprimento do arco = 2.356194m
Aproximadamente = 2.4 m
what is sqrt(405x ^ 7)?
Answer:
(405x ^ 7)²
405²x^14
164025x^14 is a square of 405x ^ 7
Step-by-step explanation:
Complete the square.
x2 + 14x +
Answer:
x² + 14x + 49
Step-by-step explanation:
x² + 14x + 49
each side = (x+7)
Help me pls. this is due tonight
Answer:
8
Step-by-step explanation:
Use the equation editor below to state how many minutes there are in 1 10 hour. Then, calculate how many minutes are equal to 5 × 1 10 hour
Answer:
Number of minutes in [tex](5\times \frac{1}{10})[/tex] hours = 30 minutes
Step-by-step explanation:
Number of minutes in 1 hour = 60 minutes
Number of minutes in [tex]\frac{1}{10}[/tex] hours = [tex]\frac{60}{10}[/tex] minutes
= 6 minutes
Therefore, number of minutes in [tex]5\times \frac{1}{10}[/tex] hours = 5 × 6
= 30 minutes
A force does 35000J of work along a distance of 10.5m. Find the applied force.
Answer: 3333.333 N
Work: To figure it out, you must do 35000J divided by 10.5. After diving, you receive the answer 3333.333N. I hope this helps you!
Correct answer gets brainliest.
Answer:
There is no number line and there are only two filled points at x=-1 and x=1
Step-by-step explanation:
The only solutions to the equation are x=-1 and x=1, because they satisfy the equation. No other values can be solutions to the equation.
What is the value of n?
Your answer in the box n=
5m 15m n 2m
Answer:
12.5
Step-by-step explanation:
because it's a progress
Plz help me
Explation for both questions and tell what conceputal key you use.
Giving 35 points
1. Lizzy opened an ice cream parlor in her neighborhood selling homemade ice cream. She has a goal to create 80 new ice cream flavors. If she already created 37 flavors, how many more flavors does she still need to create?
2. A staples truck is delivering notebooks to CMS. There are 212 boxes with 198 notebooks in each box. How many total notebooks are there?
Step-by-step explanation:
2) 212*198 = 41 976
1) 80-37 = 43
9514 1404 393
Answer:
1. SCR (or PPW). 43 more flavors
2. GLT. 41,976 notebooks
Step-by-step explanation:
1. Conceptual key: SCR
Lizzy is starting with 37 flavors. She wants a result of 80 flavors, so the change can be computed from ...
37 + x = 80
x = 80 -37 = 43
Lizzy needs to create 43 more flavors.
__
Additional comment
This might also be considered to be using the PPW pattern, as both the number she has and the number she creates make up the whole number. The SCR key may better apply to cases where a "rate of change" is involved. There is no rate of change in this problem.
_____
2. Conceptual key: GLT
There are 212 groups of 198 notebooks, so the total is the number of groups times the number in each group.
(212 boxes)(198 notebooks/box) = 41,976 notebooks
Rosario is an ecologist who studies the change in the penguin population of Antarctica over time.
The relationship between the elapsed time t, in years, since Rosario started studying the population, and
the number of penguins, P(t), is modeled by the following function:
P(t) = 21,000 • (4/7)^t/3
Complete the following sentence about the rate of change in the penguin population.
The population of penguins loses 3/7 of its size every ____ years.
Answer: every 3 years
Step-by-step explanation:
Maria sells painting in a art gallery. She earns $375 each week plus a commission of 2.5% of her swelled. What is the minimum amount of sales she must have this week to earn at lease $500.
Answer:
5000.00
Step-by Step
500.00-375.00 = 125.00
5000 x 2.5% = 125.00
375.00 + 125.00 = 500.00
PLEASE HELP I’M BEING TIMEDDDD
Answer:
1: 51.8°F
Step-by-step explanation:
2: 26.6
I'M NOT SURE IF I GOT THIS RIGHT I DID MY BEST.
If the lengths of the two legs of a right triangle are 12 and 16, what's the length of the hypotenuse?
Question options:
A)
14
B)
16
C)
20
D)
28
Please help me with 1,2,3 please and show me how you get the answers and the steps
Answer:
the link dosent work says it have bug in it
Step-by-step explanation:
A rectangle is shown.
What is the area of the rectangle?
Answer:
360
Step-by-step explanation:
15+15
12x15
ANSWER:
360
Step-by-step explanation:
15+15
12x15
Evaluate
12^2
1. 144
2. 24
3. 266
Answer:
The answer is 144
Step-by-step explanation:
12*12
12²
144
How can we rewrite 6+−2(6−9x)?
6+−2(6+9x)
6+−2(−6+9x)
6+−2(−3x)
6+−2(6+−9x)
Answer:the fourth one
Step-by-step explanation:
Work out the percentage change when a price of £50 is increased to £80.
Answer:
50 to 80 = 60%
Step-by-step explanation:
(80 -50) / 50 x 100 = 60%
Which of the following equations represents an exponential function?
a.f(x)=2x+7
b.f(x)=[tex]-2x^3[/tex]
c.f(x)=[tex]2(5)^5[/tex]
d.f(x)=[tex]x^2+3x+2[/tex]
Mr. Smith is flying his single-engine plane at an altitude of 2400 feet. He sees a cornfield at an angle of depression of 30º. What is his horizontal distance to the cornfield?
Answer:
Height of the fighter plane =1.5km=1500 m
Speed of the fighter plane, v=720km/h=200 m/s
Let be the angle with the vertical so that the shell hits the plane. The situation is shown in the given figure.
Muzzle velocity of the gun, u=600 m/s
Time taken by the shell to hit the plane =t
Horizontal distance travelled by the shell =u
x
t
Distance travelled by the plane =vt
The shell hits the plane. Hence, these two distances must be equal.
u
x
t=vt
u Sin θ=v
Sin θ=v/u
=200/600=1/3=0.33
θ=Sin
−1
(0.33)=19.50
In order to avoid being hit by the shell, the pilot must fly the plane at an altitude (H) higher than the maximum height achieved by the shell for any angle of launch.
H
max
=u
2
sin
2
(90−θ)/2g=600
2
/(2×10)=16km
Find the value of x that will make a||b
The location of each angle make them vertical angles. For the lines to be parallel the two angles need to be equal to each other.
5x + 20 = 3x + 60
Subtract 3x from both sides:
2x + 20 = 60
Subtract 20 from both sides:
2x = 40
Divide both sides by 2:
X = 20
What is the square route of 16?
Answer:
the square route of 16=√4²=4
Answer:
4
Step-by-step explanation:
16/4 is 4 and they're both the same number
what tell the hardware what to do and and how to do it
Answer:
I am assuming you are telling me to tell a piece of hardware what to do and how so in that case, Hammer go hammer in that nail by hitting yourself on its head so I can hang this painting. LOL
Step-by-step explanation: