Answer:
50 minutes A
Step-by-step explanation:
Do u need one
8TH GRADE MATH 100 POINTS+BRAINLIEST - Factor Quadratic equations- please write out the steps, explain simply, and possibly provide a couple rules to remember for questions like these in the future. Any offensive answers or ones for the sake of points will be reported THANKS SO MUCH!!!
Also, 5 more 8th grade math questions are coming–GIVING AWAY 600 POINTS
Hello,
We have : (a + b)² = a² + 2ab + b²
4x² + 20x + 25 = (2x)² + 2 × 2x × 5 + 5² = (2x + 5)² → answer B
Here, we have a = 2x and b = 5 !
Answer:
[tex]\textsf{b.} \quad (2x+5)^2[/tex]
Step-by-step explanation:
Given quadratic equation:
[tex]4x^2+20x+25[/tex]
To factor a quadratic in the form [tex]ax^2+bx+c[/tex], find two numbers that multiply to [tex]ac[/tex] and sum to [tex]b[/tex].
[tex]\implies ac=4 \times 25=100[/tex]
[tex]\implies b=20[/tex]
Factors of 100 that sum to 20: 10 and 10
Rewrite [tex]b[/tex] as the sum of these two numbers:
[tex]\implies 4x^2+10x+10x+25[/tex]
Factorize the first two terms and the last two terms separately:
[tex]\implies 2x(2x+5)+5(2x+5)[/tex]
Factor out the common term (2x + 5):
[tex]\implies (2x+5)(2x+5)[/tex]
Simplify:
[tex]\implies (2x+5)^2[/tex]
Learn more about quadratic equations here:
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Numbers and Operations KA 8th grade- correct answers only ty, and have a great day folks (7 pts)
Answer:c
Step-by-step explanation:
Answer:
it's c
Step-by-step explanation:
khan academy
Let point P be (3, 5) and Q be (8, -3). Let T be the point on segment PQ such that PT:TQ = 1:2. Find
the coordinates of point T, and explain why this point T must be the point on segment PQ such
that PT:TQ = 1:2
Answer:
(14/3, 7/3)
Step-by-step explanation:
8-3=5, and 5/3+3=14/3.
5--3=8, and 8/3+5=7/3.
This has a ratio of 1:2 because the length is divided into three and 1 is separate from the other two.
Which measure is equivalent to 350 centimeters?
3.5 m
35 m
350 m
3500 m
Answer:
The answer to your question is 3.5 m
Step-by-step explanation:
1 m= 100 cms
so 350 cms = 3.5 m
I hope this helps and have a good day!
The table and the graph each show a different relationship between the same two variables, x and y:
A table with two columns and 5 rows is shown. The column head for the left column is x, and the column head for the right column is y. The row entries in the table are 3,210 and 4,280 and 5,350 and 6,420. On the right of this table is a graph. The x axis values are from 0 to 10 in increments of 2 for each grid line. The y axis values on the graph are from 0 to 550 in increments of 110 for each grid line. A line passing through the ordered pairs 2, 110 and 4, 220 and 6, 330 and 8, 440 is drawn.
How much more would the value of y be in the table than its value on the graph when x = 11?
Answer:
275
Step-by-step explanation:
you are going to paint the sixth sector spinner shown.There are 4 colors to choose from. How many different ways can u paint this spinner if each color can be used more than once and there are no other restrictions
Answer:
There are 4096 options to choose from.
Step-by-step explanation:
6 sections each with 4 colours to choose from : 4⁶ = 4096
The spinner with 6 different parts and 4 different colors can be painted in 4⁶ ways.
What are permutation and combination?A permutation is an arrangement of things where order matters, AB and BA are two different permutations.
The combination is a selection of things where order does not matter, AB and BA are the same combinations.
Given, you are going to paint the sixth sector spinner shown and there are 4 colors to choose from also each color can be used more than once and there are no other restrictions.
∴ The first part can e painted in 4 different ways and as there are no restrictions every 6 parts can be painted in 4 different ways.
So, the total no. of ways to color this spinner with 6 different parts and 4 different colors are,
4×4×4×4×4×4 ways,
= 4⁶ ways.
learn more about permutation and combination here :
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Write the number in expanded form for the significant digits
117.000
20.018
13.265
3.4000
0.8100
I need help with this question
Answer: 62.8in
Step-by-step explanation:
The formula for circumference is C=2πr. Put the values of 10 in for r and 3.14 in for pi, and you get an equation that looks like C=2(3.14)(10). Solving this equation gets you 62.8.
Answer:
62.8
Step-by-step explanation:
Circumference=2rpi
c=2*10*pi
c=20*pi
c=20*3.14
c=62.8
Heather is planning a dessert display. She needs 4 ounces of strawberries for each dessert.
Part A: Heather is not sure how many desserts she will make. Write an expression with a variable that represents the amount of strawberries Heather needs for the desserts. Identify what the variable represents.
biscuits sweet strawberry
There are 5 blue socks in Josh’s drawer. After he removes 3 non-blue socks, the probability to pick a blue sock at random becomes . How 1/7 many non-blue socks were in Josh’s drawer originally?
Answer: There is 5 non blue sock in Josh's drawer
Step-by-step explanation:
The denominator shows the total of nonblue and blue socks. So there are 7 non-blue and blue socks in the drawer after he removes 3 non blue socks.To find how many non-blue where in the drawer originally you need to find how many non blue are in the draw after removing the three. So you subtract 7 from 5 which gives you 2. So there are 2 non-blue socks in the drawer after removing the three. Now you need to find how many non-blue were there before he removed the three. So add the 3 non blue socks that he removed to the two that were there after which gives you five.
What is the total amount due after 6 months on an initial loan of $1,400 at 12.5% annual interest.
Answer: $1487.50
Step-by-step explanation:
hey there again!
Facts:
Principal (starting amount): $1,400
Annual interest rate: 12.5% of the principal. Whenever you get an annual interest rate as a percentage, its always that percentage of the starting amount.
Time given: 6 months, 1/2 a year
the question asks "total amount due' in 6 months. Basically, we want to know how much they will have in their account after 6 months.
Step 1: Find how much interest he will get in 6 months as a percentage.
6 months is 1/2 of a year, so find 1/2 of 12.5
1/2 of 12.5
1/2 x 12.5
0.5 x 12.5
6.25%
Step 2: Find how much interest he gets, but as a number.
Principal: $1400
6.25% of 1400= $87.50
Step 3: Find the total amount of money he will have after 6 months.
he starts with 1400, and gets an additional $87.50 added to his account after 6 months. How much does he have now?
To answer this, add to find the total:
87.50+1400= $1487.50
What is the length of AC
Answer:
6.4
Step-by-step explanation:
Use the triangle angle bisector theorem.
4.9/2.6 = AC/3.4
2.6AC = 4.9 × 3.4
AC = 6.40769...
Answer: 6.4
Which expression is equivalent to 56x-28y + 42?
a.) 8(7x - 3y + 6). b.) 7(8x + 4y +6z)
c.) 7(8x - 4y + 6)
Answer:
Letter c
Step-by-step explanation:
You are distributing the 7 to each term in the parentheses.
7(8x) is 56 x
Here is the tricky part. You can think of it a couple of ways:
7(-4y) = -28y a positive times a negative is a negative.
or 7(4y) = 28 , but then remember that you are subtracting so it will become -28
7(6) = 56
56x - 28y +42
Answer:
c.) 7(8x - 4y + 6)
Step-by-step explanation:
if we solve 7(8x-4y+6), we get;
56x-28y+42
HELP ASAP!!!!!!!!!!!!!!!!!
Answer:
19
Step-by-step explanation:
ZYW=YWX
2x=180-90-(3x-5)
2x=90-3x+5
2x=95-3x
5x=95
x=19
Please help me.
i need to finish
what is √75 in simplifed form?
Answer:
5√3
Step-by-step explanation:
HELP ME ASAP!!!!!!!!!!!!!!!!
Answer:
Step-by-step explanation:
5x+ACB=180
A=33
2x+33 +ACB=180
This means 2x+33=5x
3x=33
x=11
Rolled oats is packaged in a right circular cylindrical container that has a radius of 6 centimeters and a height of 12 centimeters.
What is the surface area of this container in terms of pi?
Please use statemnet reasoning!
Answer:
lineHO parallel lineEN - Given
lineHW = lineNW - Given
angle HWO congruent angle EWN Vertical Angles
angle OHW congruent angle ENW Alternate interior angles
Thus triangle HOW congruent triangle NEW
[wouldn't let me use symbols sorry]
This is 8th grade math on khan academy, correct answers only ty- 7 points
have a gud day folks
9² or 9^2
Step-by-step explanation:Because the base is the same on the top and the bottom which is "9", you would either add or subtract the top and bottom exponent based on the arithmetic symbol used.
Because the arithmetic symbol division sign is used, you subtract the top exponent by the bottom giving you the answer nine to the power of two.
Answer:
The correct answer is [tex]9^2[/tex]
Step-by-step explanation:
9 is the base and 7-5=2. so n=2.
100 POINTS+BRAINLIEST 8TH GRADE MATH PT 5: WRITE THE EQUATION OF A LINE- this one was strange because the slope is supposed to be a negative fraction but that never appeared in the answer choices so please explain why I got it wrong thanks!!
Answer:
[tex]\textsf{b.} \quad 3x+5y=2[/tex]
Step-by-step explanation:
Define the given points:
[tex]\textsf{let}\:(x_1,y_1)=(4,-2)[/tex]
[tex]\textsf{let}\:(x_2,y_2)=(-1,1)[/tex]
Use the slope formula to determine the slope of the line:
[tex]\textsf{slope}\:(m)=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{1-(-2)}{-1-4}=\dfrac{1+2}{-1-4}=-\dfrac{3}{5}[/tex]
Use the point-slope formula to determine the equation of the line.
[tex]\implies y-y_1=m(x-x_1)[/tex]
Substitute the found slope and point (4, -2):
[tex]\implies y-(-2)=-\dfrac{3}{5}(x-4)[/tex]
[tex]\implies y+2=-\dfrac{3}{5}(x-4)[/tex]
Multiply both sides by 5:
[tex]\implies 5(y+2)=-3(x-4)[/tex]
Expand the brackets:
[tex]\implies 5y+10=-3x+12[/tex]
Add 3x to both sides:
[tex]\implies 5y+10+3x=-3x+12+3x[/tex]
[tex]\implies 3x+5y+10=12[/tex]
Subtract 10 from both sides:
[tex]\implies 3x+5y+10-10=12-10[/tex]
[tex]\implies 3x+5y=2[/tex]
Help me please and thank you !
Answer:
Step-by-step explanation:
(A)length of a stamp=1/5foot
wide of a stamp=1/4foot
area of the stamp=?
area of the stamp=length of a stamp *wide of a stamp
=1/5*1/4
=1/20square foot
(B)an area of the room=1/4 square meter
width of the room=1/5meter
length of the room=?
an area of the room=width of the room*length of the room
1/4 =1/5 * length of the room
1/4 = length of the room/5
5/4 =length of the room
length of the room =5/4=1 1/4(C)the area of the canvas=1/5square yard
width of the canvas=1/4 yard
length of the canvas=?
an area of the canvas=width of the canvas*length of the canvas
1/5 = width of the canvas*1/4
1/5 = width of the canvas/4
4/5 =width of the canvas
width of the canvas= 4/5
(D)length of the rectangular course=1/5mile
area of the rectangular course=1/4square mile
width of the rectangular course=?
an area of the rectangular course
=
width of the rectangular course*length of the rectangular course
1/4 =width of the rectangular course*1/5
1/4 =width of the rectangular course/5
5/4 =width of the rectangular course
width of the rectangular course=5/4
SALES TAX Apply your knowledge of percentages to solve the problems below. Round answers to the nearest hundredth. 1. How much sales tax will be charged on a good priced at $32.507 2. How much sales tax will be charged on a good priced at $56.00? 3. If a good is priced at $17.00, how much will you pay after tax? 4. If a good is priced at $132.99, how much will you pay after tax? 1
PLEASE ANSWER: A camera usually sells for $68. Because it was slightly damaged, it sold for $59.90, what was the rate of the discount to the NEAREST PERCENT?
These days people use plastic to pay for everything. " What does this synecdoche mean in this question?
Answer:
ospe4mhe is taht he iaoe
Answer:
Synecdoche means in which a part of something is substituted for the whole (as hired hand for "worker")
6.) Michael & Melissa both claim to be earning a C average, 70% to 79%, in their Latin Class. Use the table below to explain their reasoning and determine which student is earning a C average.
To figure out the average of Michael and Melissa we must add up all their test scores and divide the by 7; which is the number of tests they took.
Michael:
(80+76+73+70+40+25+10)/7
Melissa:
(88+83+75+70+60+65+62)/7
Michael's average is 53.4
Melissa's average is 71.9
So Melissa is earning a C in Latin.
The table shows the height in inches of 10 players on a college basketball team.
Answer:
A) The median is one of the values listed in the table
Step-by-step explanation:
The median is the middle number in an ordered data set. Since the number of date in the table is a even number, both 75 and 76 is the middle number. To find the median of an set of data that has an even number of sets, you just add the 2 middle numbers together and divide by 2. So like:
75+76=151
151/2=75.5
75.5 is the median but its not listed in the table, so A.
The sum of the digits of a two-digit number is 5. If nine is subtracted from the number, the digits will be reversed. Find the number.
If the tens digit is x, then the equation is:
The number is:
Answer: 32
Step-by-step explanation:
The only numbers that can have 2 digits and two of which equal to five can only be:
3+2
2+3
4+1
1+4
So the numbers are: 41,14,23, and 32.
41-9=32
14-9=5
23-9=14
32-9=23
Since the question is asking for the number who’s difference is the reverse of one of the numbers. The only possible answer is 32 because 32-9= 23. (23 is the reverse of 32)
PLEASE: Find The Ending Balence
1. $939 at 8% for 6 years
2. $823 at 3% for 9 years
3. $269 at 1# for 3 years
Answer:
$450.72$222.21$8.07Step-by-step explanation:
Can any one give me the answer????? Please
The domain of the notation [tex]s(x) = \sum\limits^{\infty}_{n=1} n^{-x}[/tex] is the set of all real values
How to determine the domain?The sum notation is given as:
[tex]s(x) = \sum\limits^{\infty}_{n=1} n^{-x}[/tex]
From the above notation, the smallest value of n is 1.
This means that the variable x can take any real value as it value
Hence, the domain of the notation [tex]s(x) = \sum\limits^{\infty}_{n=1} n^{-x}[/tex] is the set of all real values
Read more about domain at:
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