How can you tell by just looking at the coefficients of -2x² and 2x2 that the terms will add to zero?
Answers
Answer:
Their coefficient have the same number but with opposite sign
Step-by-step explanation:
We can tell that the two coefficient will add to zero because they have the same value but opposite signs.
When two numbers are of the same value but with opposite sign, they add up to zero.
The given numbers are;
-2x² and 2x²
Coefficient is the number before the variable. Here, the variable is x,
-2x² = -2
2x² = 2
-2 + 2 = 0
Related Questions
How many quarts of water must be added to 7 qts of a 19% saline solution to obtain a 5% saline solution?
Answers
Answer: quantity of water added = 19.6 quarts
Step-by-step explanation:
Let x= quantity of water added
Then, Quantity of saline in 7 quarts solution = 19% of 7 = 0.19 (7)=1.33 quarts [to remove % divide number by 100]
When x quarts water is added , the quantity of solution becomes = x+7
Quantity of saline in it= 5% of (x+7)= 0.05(x+7)
Now, quantity of saline remains same, so
[tex]1.33= 0.05(x+7)\\\\\Rightarrow\ 1.33x=0.05x+0.35\\\\\Rightarrow\ 1.33-0.35=0.05x\\\\\Rightarrow\ x=\dfrac{0.98}{0.05}=19.6[/tex]
Hence, quantity of water added = 19.6 quarts
2-10x=-8x-8 helpppp pleaseeee
Answers
Answer:x=5
Step-by-step explanation:1 step subtract 2 from both sides 2 step:simplify 3 step: add 8x to both sides 4 step: simplify 5 step: divide both sides by -2 6step: simplify x=5
what is the difference between an independent variable and a dependent variable and how does the independent and dependent variables relate to a graph
Answers
Answer:
Remember, the values of both variables may change in an experiment and are recorded. The difference is that the value of the independent variable is controlled by the experimenter, while the value of the dependent variable only changes in response to the independent variable
Step-by-step explanation:
Answer:
The independent variable is the cause. Its value is independent of other variables in your study. The dependent variable is the effect. Its value depends on changes in the independent variable.
Step-by-step explanation:
what is the value of x?
Answers
Answer: I believe 13.5
Step-by-step explanation: PLEASE GIVE BRAINLIEST IT HELPS ALOT
Answer:
the letter x is often used in algebra to mean a value that is not yet known. it is called a variable or sometimes an unknown in x + 2 =7 ,x is a variable,but we can work out its value if we try.....
transformation takes figure G to figure H?
Answers
Answer:
Reflection
Step-by-step explanation:
there no need step by step it just u got to look at it the shape like this one its a Reflection because its filp
BRO HELP I GOT SO MUCH F'S ANYWAYS WHAT IS 9-(3.7)
Answers
Answer:
5.4
Step-by-step explanation:
9 - 3.7
9 + -3.7 = 5.4
Answer:
5.3
Step-by-step explanation:
PLEASE HELP MEH WILL ARK BRAINLIST
Answers
Answer:
B, C, D, E, A
Step-by-step explanation:
In order to know you have to get them all to the same form. This means converting all of them to a fraction or decimal. You can convert to whichever you prefer. I will be doing decimals since I find that easiest to understand.
A = 13.5
B = -13.5
C = -3
D = 0
E = 0.135
You can see then that the order is B, C, D, E, A.
A bag of marbles has 4 Red and 3 Green marbles. You pick from the bag, replace the marble and then pick again. What is the probability of picking red both times?
A. 16/49
B. 12/42
C. 4/7
Answers
Macon Steinberg purchased a motor scooter with an installment loan that has an APR of 16 percent. The motor scooter sells for $1,687. The store financing requires a 20 percent down payment and 30 monthly payments.
What is the down payment?
What is the amount of the loan?
What is the monthly payment?
What is the total amount repaid?
What is the finance charge?
Answers
The finance charge is $285
How to find the percentage from the total value?Suppose the value of which a thing is expressed in percentage is "a'
Suppose the percent that considered thing is of "a" is b%
Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts and then we multiply it with b so that we collect b items per 100 items(that is exactly what b per cent means).
Thus, that thing in number is
[tex]\dfrac{a}{100} \times b[/tex]
Given;
An installment loan that has an APR of 16 percent
The motor scooter sells for $1,687
The store financing requires a 20 percent down payment
Monthly payments are for 30months
Now,
Downpayment= cost of scooter*20%
=1687*20%
=$337.4
Amount of finance = Cost of scooter - Down payment
=1687-337.4=1349.6
Interest rate=16%*1/12=1.3% per month
Monthly payment = Amount of finance*I/[1-(1+I)^-n]
=1349.6*1.3%/[1-(1+1.3%)^-30]
=1349.6*0.013(1-0.6780)
=17.5448/0.322
=54.486
Total amount paying for loan over a period = Monthly payment * Term
=54.486*30=1634.6
Amount of finance charge = Total amount paying for loan - Amount of loan
Amount of finance charge =1634.6-1349.6
=285
Therefore, the finance charge by given percent will be $285
Learn more about percent here:
https://brainly.com/question/11549320
#SPJ1
which table has a constant of proportionality between y and x of 2
Answers
Answer:
B for Khan Academy.
Step-by-step explanation:
Answer:
The answer is B for Khan Academy
Step-by-step explanation:
I just got it right.
can someone please answer this question? thank you! (assignment due today)
15. Find the values of x and y.
(10x – 61)º
(18y + 5)º
(r + 10)º
Answers
Answer:
egc jnpz rof join it on google meet
can someone help me to find a website that gives many exercises in math and science?
Answers
Answer:
Khan Academy
Answer:
khan academy is a great place to go
Step-by-step explanation:
hope this helped!
p.s it would be cool if you gave me brainliest.
What is the simplified expression for
3^3 • 3^3/ 3^4
O 30
O 31
O 32
O 34
Answers
Answer:
your answer is D if im right it been so long since i did this
Step-by-step explanation:
This shape is a polygon.
O True
O False
I need this ASAP plsss TY
Answers
Answer:
yes it has at least three straight sides so the answer is true
Step-by-step explanation:
the definition is: a plane figure with at least three straight sides and angles, and typically five or more.
Answer:
it is true
Step-by-step explanation:
its a 2-dimensional shape formed with straight lines
2. Mr. Jansen needs to order picture frames for his paintings. He has $4,000 to buy 98 frames priced at $42 each. Mr. Jansen says he has enough money because 100x40=4,000. Is his reasoning corrector not? Explain your reasoning.
Answers
and if you do the math that he did (100 x 40 = 4,000) well that maybe true just not for this question
because if he has $4,000 and each picture frame equals $42 he will be able to get 95 picture frames
$42 x 95 = 3,990
which is under the price limit and if he bought one more for example ( $42 x 96 = 4,032) that will be over the limit
Answer:
The reasoning isn't correct
Step-by-step explanation:
This is becuase the given amount for each frame is 42 dollars not 40 like it is listed in the equation. Another reason the reasoning from Jansen is wrong is because he wants to buy 98 frames, not 100 like it was listed in the equation.
what is an equation in point-slope form for (-8,5) and (-3,5)
Answers
Answer:
Step-by-step explanation:
Y-5=-2/5(x + 8)
can someone help please
Answers
I am a 3 digit number. I have the largest 1 digit number in the tens place , the number that has the same place value always in the ones place and 4 in the hundredth place. Who am I?
Answers
Answer: 490
Step-by-step explanation:
Multiply -2 1/4 *( -2 1/3)
Answers
Answer: 5 1/4
-9/4x-7/3=63/12
Simplfy: 5 1/4
Answer:
5 1/4
Step-by-step explanation: hope this helps you out!
Bradley went on a bike ride to the store 6 miles away. If it took Bradley 38 of an hour to get there and 14 of an hour to get back, what was his average rate of speed (miles per hour) for the entire trip? (Hint: To find the average, divide the total distance by the total duration.)
Answers
Answer:
19.2
Step-by-step explanation:
The average speed for the entire trip was 0.23 miles per hour.
What is average speed?The average speed is the total distance travelled by the total time taken to travel the distance. It does not depend upon the instantaneous speed of the object.
The total distance of the store is 6 miles.
The time taken to reach is 38 hour.
And, the time to come back is 14 hours.
Since, the average speed is given as the ratio of the total distance to the total time.
Here, the total distance is 2 times the given distance.
Thus, the average speed is found as.
(6 + 6)/ (14 + 38)
= 12/52
= 3/13
= 0.23
Hence, the average rate of speed for the entire trip is 0.23 miles per hour.
To know more about speed click on,
https://brainly.com/question/28224010
#SPJ2
It costs $50 to rent a car plus $3.00 per gallon of gas in the car. Sue can spend at most $86.00 total, so what's the most amount of gallons of gas she can get when she rents the car?
1.Write the inequality (ex. a + bx ≤ c) and show all work to solve the inequality.
2. Explain what your solution means in the context of the problem. (Hint: What's the most amount of gallons Sue can get?)
3. If you were to graph this on a number line would you shade left or right?
Answers
Answer:
i just know you can have 12 gallons of gas
Step-by-step explanation:
because it is 3x2=6
3x10=30 which means 10+2=12
A bus makes a stop 2:30 letting off 13 people and lettng on 8. The bus makes another stop ten minutes later to let off 3 more people. How does the number of people on the bus after the second stol compare to the number pf people on the bus before the 2:30 stop??
Answers
Answer:
The number of people on the bus after the second stop is 8 less than the number of peoples on the bus before the 2:30 stop.
Step-by-step explanation:
Let [tex]P_0[/tex] be the total number of peoples on the bus before 2:30 stop.
For the first stop at 2:30:
The bus let off 13 people, so, the total number of remaining people on the bus [tex]= P_0-13[/tex]
again, the bus let on 8 people, so, the total number of people on the bus
[tex]= P_0-13+8[/tex]
[tex]=P_0-5[/tex]
For the second stop after 10 minutes (i.e at 2:40):
The bus let off 3 people, so, the total number of remaining people on the bus [tex]= P_0-5-3[/tex]
[tex]=P_0-8[/tex]
After the second stop, the number of people on the bus is [tex]P_0-8[/tex], where P_0 number of peoples on the bus before 2:30 stop.
Hence, the number of people on the bus after the second stop is 8 less than the number of peoples on the bus before the 2:30 stop.
SOMEONE PLZZ HELP ME ASAP I HAVE TO TURN THIS IN SOON!!!!!!!!
A pair of shoes cost $75 and are on sale for 25% off. What would be the cost of the shoes AFTER the discount?
Answers
Answer: 56.50
Step-by-step explanation:
75 divided by 2 = 37.50
37.50 divided by 2 = 18.75
75 - 18.75 = 56.25
Hope this helps!
Mrs. lee bought 2 gallons of apple cider for 7.40. how much does she pay for 5 gallons of apple cider?
Answers
Answer: 18.50$
.....................................................
Alex calculates that he has a minimum household budget of 55,600. if he works 200 hours in one month, what is the minimum hourly rate Alex needs to be paid?
Answers
Answer:
I wish I've known, but try using Symbo-Lab or Math-Way. They help a lot.
Step-by-step explanation:
Guadalupe fue a la mercería a comprar 15.5 m de encaje blanco que necesita para la clase de costura. Si cada metro cuesta $5.60, ¿cuánto pagó por todo el encaje que necesita?
También pidió 4.75 m de cinta azul que le encargó su mamá. Si el metro cuesta $8.80 y su mamá le dio $40.00, ¿le alcanzará el dinero para comprarla?
¿Le falta o le sobra dinero? ¿Cuánto?
Answers
Answer:
a) Guadalupe pagó $ 86.8 por 15.5 metros de encaje blanco.
b) Guadalupe tendría que pagar $ 41.8 por 4.75 metros de cinta azul, entonces, no le alcanzaría el dinero para comprarle eso. Tendría un déficit de $ 1.8.
Step-by-step explanation:
a) Tras una lectura cuidadosa al enunciado, establecemos que el coste total pagado por Guadalupe es el producto de metraje comprado ([tex]n[/tex]), medido en metros, y el coste unitario ([tex]c[/tex]), medido en pesos por metro:
[tex]C = c\cdot n[/tex] (Eq. 1)
Si conocemos que [tex]c = 5.60\,\frac{\$}{m}[/tex] y [tex]n = 15.5\,m[/tex], entonces tenemos que:
[tex]C = \left(5.60\,\frac{\$}{m}\right)\cdot (15.5\,m)[/tex]
[tex]C = \$ \,86.8[/tex]
Guadalupe pagó $ 86.8 por 15.5 metros de encaje blanco.
b) El coste total de la cinta azul es: ([tex]c = 8.80\,\frac{\$}{m}[/tex], [tex]n = 4.75\,m[/tex])
[tex]C = \left(8.80\,\frac{\$}{m} \right)\cdot (4.75\,m)[/tex]
[tex]C = \$\,41.8[/tex]
Guadalupe tendría que pagar $ 41.8 por 4.75 metros de cinta azul, entonces, no le alcanzaría el dinero para comprarle eso. Tendría un déficit de $ 1.8.
HELP ME SOLVE THIS PROBLEM PLEASE PLEASE
Answers
Answer:
C) y=4x+1
Step-by-step explanation:
y=4x+1
Answer:
option c) y = 4x + 1
Step-by-step explanation:
(-1 , -3) ; (2 , 9)
Slope = [tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\\[/tex]
[tex]= \frac{9-[-3}{2-[-1]}\\\\=\frac{9+3}{2+1}\\\\=\frac{12}{3}\\\\= 4[/tex]
Equation : y - y₁ = m(x - x₁)
y - 9 = 4(x - 2)
y - 9 = 4x - 8
y = 4x - 8 + 9
y = 4x + 1
14. You traveled 48 miles less than your friend Pablo. If you traveled 117 miles how
many miles did Pablo travel? Find your solution
Answers
Answer:
165 miles
Step-by-step explanation:
117 + 48 = 165
he got it right.
Which of the following equations have no solution? Check all that apply.
6x + 1 = 3(2x – 4)
2 – 5x = 7x – 12
4(3 – x) = 2(6 – 2x)
5(x + 2) = 2(x – 4)
–4(x + 3) = 4(–x – 1)
Answers
Answer:
–4(x + 3) = 4(–x – 1) and 6x + 1 = 3(2x – 4)
Step-by-step explanation:
Answer:
1 ans 5
Step-by-step explanation:
no solution –––
6x + 1 = 3(2x - 4)
6x + 1 = 6x - 4
6x - 6x + 1 = 6x - 6x - 4
1 ≠ -4
one solution
2 - 5x = 7x - 12
2 -5x + 5x = 7x + 5x - 12
2 = 12x - 12
2 + 12 = 12x - 12 + 12
14 = 12x
x = 14/12
infinite solutions
4(3 - x) = 2(6 - 2x)
12 - 4x = 12 - 4x
12 - 12 - 4x + 4x = 12 - 12 - 4x + 4x
0 + 0 = 0 + 0
0 = 0
one solution
5(x + 2) = 2(x - 4)
5x + 10 = 2x - 8
5x - 5x + 10 + 8 = 2x - 5x - 8 + 8
18 = -3x
x = -6
no solution –––
-4(x + 3) = 4(-x - 1)
-4x + 4x - 12 = -4x + 4x - 4
-12 ≠ -4
Chucky grabbed 111111 items in the grocery store that each had a different price and had a mean cost of about \$4.44$4.44dollar sign, 4, point, 44. On his way to the register, he gave in to an impulse to add a 12^\text{th}12 th 12, start superscript, start text, t, h, end text, end superscript item: an entire wheel of cheese that cost \$39.99$39.99dollar sign, 39, point, 99. [Show data] How will adding the wheel of cheese affect the mean and median? Choose 1 answer:
Answers
Answer:
[tex]The[/tex] [tex]answer[/tex] [tex]is[/tex] [tex]B[/tex] = Both the mean and median will increase, but the mean will increase by more than the median
- written in [tex]2/5/2021[/tex]
