Answer:
x = 2, x = -2
Step-by-step explanation:
2x^2 = 8
divide both sides by 2
x^2 = 4
This is a perfect square!
square root on both sides
x = 2, or -2
(2 negatives multiplied = positive)
Check work
2*(2)^2 = 8
2*4 = 8
8 = 8 :)
Check work
2*(-2)^2 = 8
2*4 = 8
8 = 8 :)
What is a fraction?? don’t copy from googl
pls give a good explanation
Answer:A fraction represents a part of a whole
Step-by-step explanation:
eg: 3/5 by 5/5
please view explanation
Calculations ↓The definition of a fraction is a part of a whole .
If a whole is divided into equal parts, these equal parts are called fractions.
Fractions are written like this :
[tex]\boxed{\\\begin{minipage}{4cm}fractions\\$\displaystyle\frac{x\xrightarrow{numerator}}{y\xrightarrow{denominator}} \\ \end{minipage}}[/tex]
Where
y = the number of total parts
x = the number of parts taken
Now, it doesn't necessarily have to be a pizza or a cake.
Suppose your companion Danette has 32 pencils. Out of them, 8 pencils are red.
What fraction of the pencils is red?
Total number of pencils = 32 (denominator)
Number of red pencils = 8 (numerator)
So the fraction of red pencils is :
[tex]\boxed{\\\begin{minipage}{4cm}Danette's\:pencils \\ $\displaystyle\frac{8}{32} \\ \end{minipage}}[/tex]
If the numerator and denominator are divisible by the same number, then we can reduce the fraction :
[tex]\boxed{\\\begin{minipage}{4cm}Danette's\:pencils \\ $\displaystyle\frac{1}{4} $\\ \end{minipage}}[/tex]
Questions about fractions? If any, comment ~
hope helpful ~
help with this as well
Answer:
10.53 m
Step-by-step explanation:
since the two triangles that are formed are similar triangles, you can find out that by how much the base of the small triangle is getting larger in the bigger triangle by dividing the two measurements. after finding out that the scale factor is 9.16, i multiplied the height of the person by 9.16 to figure out the height of the school building since they are similar
hope u get it:)
whats 60 x 60 - 100 -10 please help
Answer:
3490
Step-by-step explanation:
You first multiply 60 by 60 you will get 3600 then you minus 3600 by 100 you will get 3500 then you minus 3500 by 10 you will get 3490 that how you get you answer
your welcome
The library labels each book with a five-digit code to identify the book in their computer system. Each code is 3 digits (0-9) followed by two letters. How many codes are possible?
Answer:The number of all possible codes = 26 * 26 * 10 * 10 * 10 = 676000
Step-by-step explanation:
five digit code; each code is 3 digits (0-9) followed by two letters. That's ten numbers to choose from and 26 letters in the alphabet.
The problem suggests numbers and letters can be used more than once, like having a code: 555AA
To find the number of possible codes, you multiply by the choices for each digit.
10*10*10*26*26 = 676,000
Answer:
26 * 26 * 10 * 10 * 10 = 676000
Step-by-step explanation:
I'm stuck on this question
Answer:
a) 2.5π, b) ≈673 times
Step-by-step explanation:
diameter = 2.5
circumference = diameter*π
circumference = 2.5π
5280/2.5π
≈5280/2.5*3.14
≈5280/7.85
≈672.6, ≈673
Mike -(a boy) -and Kate -(a girl) -are -siblings. Mike- has -as -many -brothers -as -sisters. Kate -has -twice -as -many -brothers -as -sisters. How- many -girls,- counting- the- children- only -are -in -the -family? - Please answer!!
I will mark brainliest
Mike has 3 brothers and 3 sisters
Kate has 4 brothers and 2 sisters
all the girls in the family are 3
hope it helps...!!!!
PLEASE HELP ME NOW!!!!!!!!!!
Answer:
Step-by-step explanation:
Sorry for the handwriting, but hope u can understand it :)
∠ADC and ∠CDJ are complementary angles. What is the m∠ADC?
*Hint, first find the value of x, then find the measure of the angle.
Line A K and line M J intersect at a right angle at point D. Line L C also passes through point D, forming angle A D C and angle J D C. Angle A D C measures four x degrees, and angle J D C measures three x minus eight degrees.
Question 6 options:
90°
56°
14°
34°
∠CDJ = 34°.
Step-by-step explanation:
In this question AK and MJ intersect at 90°.
∠ADC = 4x° and ∠JDC = (3x - 8)°
We have to find the measurement of ∠CDJ.
Since ∠MDA = ∠KDJ = ∠ADJ = ∠MDK = 90°
Therefore ∠ADJ = ∠ADC + ∠JDC = 90°
4x + 3x - 8 = 90
7x - 8 = 90
7x = 98
x = 98/7 = 14
Therefore m∠CDJ = 3x - 8 = 3×14 - 8 = 42 - 8 = 34°
Answer is m∠CDJ = 34°
Find each value. (1.2) to the power of 3, (1/4) to the power of 4, (2) to the power of 6, 2 to the power of 6.
Answer:
1.728
Step-by-step explanation:
1.2^3 = 12^3/10^3
12^3/10^3 = 1728/1000
1728/1000 = 1.728
It costs $3.56 to buy a pack of pencils. Which of the following equations shows the amount of money needed, x, to buy k packs of pencils?
x = 3.56k
k = 3.56x
x = 3.56 + k
k = 3.56 + x
Determine the area of the shaded region. Use 3 for pi.
Help! 7th grade math question!
Answer:
The scale factor was x3
Step-by-step explanation:
3 x 3 = 9. 5 x 3 = 15. So the scale factor is times 3 or x3.
Answer:
The scale factor is 3
Step-by-step explanation:
this is because if you divide the length or the width of rectagle B by 3, it will give you the length or width of rectangle A
Hope this helps!
The graph below shows the numbers of orders received by a company for five months.
PLEASE HELP ME ITS DUE IN 1 HOUR
Answer: Answer:Median: 10.5Lower quartile: 4Upper quartile: 16Explanation:Median:First, write the observations in ascending order or descending order.The formula to calculate the median is mean of (n/2) and (n/2+1)th observations, for even number of observationsn = 12 (even)Median = Mean of (6)th and (7)th observations = 10 + 11 divided by 2 = 21/2 = 10.5Therefore the median is 10.5.After writing in ascending or descending order the first and last terms justify the lower and upper limits respectively.They are:Lower quartile: 4Upper quartile: 16Question 2.the lengths of 10 pencils, in centimeters:18, 15, 4, 9, 14, 17, 16, 6, 8, 10Type below:_________________Answer:Median: 12Lower quartile: 4Upper quartile: 18Explanation:Median:First, write the observations in ascending order or descending order.The formula to calculate the median is mean of (n/2) and (n/2+1)th observations, for even number of observationsn = 10 (even)Median = Mean of (5)th and (6)th observations = 10 + 14 divided by 2 = 24/2 = 12Therefore the median is 12.After writing in ascending or descending order the first and last terms justify the lower and upper limits respectively.They are:Lower quartile: 4Upper quartile: 18Question 3.Make a box plot to display the data set in Exercise 2.Type below:_________________Answer:The above box plot represents the lower and upper quartiles, the median.Explanation:Box plot is drawn using the number line and the rectangle which is drawn above it.The ends of the rectangles say about the lower and upper limits and the middle line indicates the median.Question 4.The numbers of students on several teams are 9, 4, 5, 10, 11, 9, 8, and 6. Make a box plot for the data.Type below:_________________Answer: Explanation:Box plot is drawn using the number line and the rectangle which is drawn above it.The ends of the rectangles say about the lower and upper limits and the middle line indicates the median.Therefore the lower and upper quartiles are 4 and 11 respectively.Median:First, write the observations in ascending order or descending order.The formula to calculate the median is mean of (n/2) and (n/2+1)th observations, for even number of observationsn = 8 (even)Median = Mean of (4)th and (5)th observations = 8 + 9 divided by 2 = 17/2 = 8.5Therefore the median is 8.5.
Step-by-step explanation:
The grid contains a circle with a diameter of 2 centimeters. Use the grid to estimate the area of the circle to the nearest whole square centimeter.
A circle graphed on a 4-by-4 grid. The circle has a diameter of 4 units.
area: about ?? cm²
How can you change the grid to improve your estimate? Explain.
The area of the circle is the amount of space on the circle
The area of the circle is about 14 cm²
How to estimate the area of the circle?From the question, we understand that the circle fits perfectly into the grid.
This means that the area of the circle is about the same with the area of the square grid.
The area of the square grid is:
Area = 4 * 4
Evaluate
Area = 16
The surrounding areas are triangles with the following estimated dimensions:
Base = 1.5, Height = 1.5
The area of the four triangles is:
Area = 4 * 0.5 * 1.5 * 1.5
This gives
Area = 4.5
Subtract the area of the triangle from the square
Remaining area = 16 - 4.5
Remaining area = 11.5
Approximate
Remaining area = 12
Hence, the area of the circle is about 12 cm²
How to improve the grid?To improve the grid, we simply get the actual dimension of the black region
Read more about area at:
https://brainly.com/question/24487155
The Ridgeport school district collected data about class size in the district. The table shows the class for sizes five randomly selected Kindergarten and seventh-grade classes.
Answer:
A
Step-by-step explanation:
the mean is higher than kindergartens mean which shows its larger and the deviation is lower which shows less variation
Answer:it’s not B, it’s A
Step-by-step explanation:
I took the test and B was wrong, It’s A
WILL GIVE BRAINLIEST find the vertex of the parabola y=x^2+8
Answer: (0, 8)
Step-by-step explanation:
Vertex form: 4 · 1/4 (y - 8) = (x - 0)²
(h , k) = (0, 8)
Mr. Dion is the band director at school. He asks students
to record how long they have played an instrument. The
dot plot shows the data he has recorded.
Length of Time Students Played
an Instrument
2 3
5
Number of years
What unit of measure is used in the study?
A. Number of observations
B. Number of instruments
C. Years
D. Number of students
Lidia keeps eight cards with the picture of a tomato and four cards with the picture of a carrot on a table face down, so the pictures are hidden. She mixes up the cards then turns over one card and finds the picture of a carrot on it. She removes this card from the table and turns over another card.
What is the probability that the card Lidia turns over has a carrot on it?
A. 3/12
B. 3/11
C. 7/12
D. 7/11
I need help
Answer:
B
Step-by-step explanation:
Add the number of the remaining cards
8 cards of tomatoes + 3 remaining cards of carrots
since Lidia turned the cards and put away 1 carrot card.
At first she had 4 on the table but now she has 3
So, add 8+3= 11
The question is asking... what is the probability that the card Lydia turns over has a carrot on it.
so we put the number of remaining carrot cards over the total number of cards.
3/11
✌
hey can someone help me
Answer:
I think its 345.6m^3
Step-by-step explanation:
Volume=Base x Height
Volume=(4.8 x 7.2) x 10
Volume=34.56 x 10
Volume is 345.6 m^3
Answer:
v= b x h 4.8 x 10 = 32.3
Step-by-step explanation:
Math help, please. I need help.
Answer:
I also need help with that
Step-by-step explanation:
sorry
here is the problem if anyone knows the answer pls help thanks!
Answer:
A
Step-by-step explanation:
Just take any points and find the gradient it will be 2/3
Please give brainliest
Answer:first one probably I think probably
Step-by-step explanation:
Determine whether the given equation has one solution, no solution, or infinitely many solutions. 2/3 x = 9-2 (-1/3 x + 3)
one solution cannot be determined
infinitely many solutions
no solution
Answer:
no solution
thats the answer :)
<3
-maddie
what is the area of the trapiozd 12 in base 6 in height
Answer:
Step-by-step explanation:
If each square that is broken into 100 parts is considered a whole, which model represents 0.68 of 2? 2 models divided into 100 parts. Left: 68 are shaded gray. Right: 68 are shaded gray. 2 models divided into 100 parts. Left: 70 are shaded dark gray. 30 are shaded light gray. Right: 0 are shaded dark gray. 40 are shaded light gray. 2 models divided into 100 parts. Left: 60 are shaded dark gray. 40 are shaded light gray. Right: 20 are shaded dark gray. 20 are shaded light gray. 2 models divided into 100 parts. Left: 100 are shaded gray. Right: 100 are shaded gray.
2 models divided into 100 parts. Left: 68 are shaded gray. Right: 68 are shaded gray.
=====================================================
Explanation:
Consider the problem of 0.68 of 1, in other words 0.68*1 or simply 0.68
The number 0.68 is 68/100 or 68 over 100. We can have a 10 by 10 grid of tiny squares. Shade in 68 of them to represent 0.68 aka 68 hundredths.
So you'd have 6 full rows shaded (to account for 0.60 so far) and then an additional 8 squares in the seventh row (adding on 0.08 to get 0.60+0.08 = 0.68)
All of this is for one square. Double this process and you'd get 0.68*2 to represent the value 1.36
In total, 2*68 = 136 squares are shaded out of 2*100 = 200 squares total.
Ellie is using five different measurements for a project in woodshop. The fractions in the image represent the measurements she’ll need. Which list shows the measurements in order from least to greatest?
Answer:
B. is the correct order
Step-by-step explanation:
because 9/64 is the least one among all.
Help pls. I don't know what to do :(
Answer:
2.8
Explanation:
[tex]r=\sqrt{\frac{v}{\pi h} } = \sqrt{\frac{213}{\pi (8.6)} } = 2.8078[/tex]
If the volume of the prism is 480 cubic inches, what is the base length?
A) 10 inches
B) 20 inches
C) 22 inches
D) 24 inches
Find the area of each circle with the given radius or diameter. Use 3.14 for pi.
Answer:
Read explanation
Step-by-step explanation:
r=4in 4^2 is 16 then multiply it by 3.14 to get 50.24
r=2in 2^2 is 4 then multiply it by 3.14 to get 12.56
d=2in Since you have the diameter first, you just divide it by 2 and your radius is 1. 1^2 is 1 1*3.14=3.14
r=8in 8^2 is 64 then multiply it by 3.14 to get 200.96
d=12in divided 12 by 2 and you get 6. 6^2 is 36, multiply that by 3.14 to get 113.04
Please hlep me with this quick all i need to know is what the x of KL is
Answer:
I believe it is 8
Step-by-step explanation:
4.8/3 = 1.6
5×1.6=8
Answer:
8 is ur answer
Step-by-step explanation: