Answer:
50
Step-by-step explanation:
If xx and y vary directly and y is 21 when x is 7, find y when x is 5
Answer:
y = 15
Step-by-step explanation:
We need to solve for k
y = x
21 = 7k Divide both sides by 7 to solve for k
3 = k
y = xk
y = 5(3)
y = 15
Answer: y = 15
Step-by-step explanation:
answer to number 4 pls :)
x-2y=3, x^2-2y=3, x^2-2xy+4y^2=11, find the value of x^2y-2xy^2
This is a system of three equations with two unknowns, x and y. To solve it, we can use the method of elimination. First, we can eliminate y by subtracting the first equation from the second equation:
x^2-2y=3 - (x-2y=3) => x^2-x=0
Then we can factor the resulting equation and find the values of x:
x^2-x=0 => x(x-1)=0 => x=0 or x=1
Next, we can substitute these values of x into any of the original equations and find the corresponding values of y. For example, using the first equation:
x-2y=3 => 0-2y=3 => y=-3/2 when x=0 x-2y=3 => 1-2y=3 => y=-1 when x=1
Finally, we can substitute these values of x and y into the expression x2y-2xy2 and evaluate it:
x2y-2xy2 => 02(-3/2)-2(0)(-3/2)2 => 0 when x=0 and y=-3/2 x2y-2xy2 => 12(-1)-2(1)(-1)2 => -3 when x=1 and y=-1
Therefore, the value of x2y-2xy2 can be either 0 or -3 depending on the values of x and y.
solve this equation
1/4a+3=31
solution of 1/4a+3=31 is a=112
\(\frac{1}{4}\)a+3=31
Transposing 3 to RHS we get
\(\frac{1}{4}\)a=31-3
\(\frac{1}{4}\)a=28
dividing1/4 with 28
a=28 x4/1
we did this because in fraction division we multiply its inverse by the dividend.
∴a=112.
To know more about fraction division:
https://brainly.com/question/1622425
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Using inverse operations is a direct way to solving equations
What is the Golden Rule for solving equations?
Answer:
Do unto one side of the equation, what you do to the other!
Step-by-step explanation:
An equation is like a balance scale. If we put something on, or take something off of one side, the scale (or equation) is unbalanced. When solving math equations, we must always keep the 'scale' (or equation) balanced so that both sides are ALWAYS equal.
Answer:
Keeping the equation balanced.
Step-by-step explanation:
You need to keep the equation balanced on both sides of the equal sign, like when you need to get rid of the number 4 on one side you have to do the same thing on the other side.
please help due today!!!!!!!!!!!
Answer:
20
Step-by-step explanation:
Substitute the given values:
A= 4
B= 3
C= 2
5(a+b)-3(b+c)
5(4+3)-3(3+2)
Add the numbers:
5(7)-3(5)
5•7 = 35 and 3•5= 15
35-15 =20
During a sale, a store offered a 10% discount on a tablet computer that originally sold for $400. After the sale, the discounted price of the tablet computer was marked up by 10%. What was the price of the tablet computer after the markup? Round to the nearest cent.
Answer:
$396
Step-by-step explanation:
First we need to find the price after the 10 percent discount. In order to do that we have to multiply 400 by 0.10 which is the same as 10 percent. When we put that in a calculator we get 40, now we have to subtract the original price of $400 by $40 which gives us $360. To find the price after the markup we multiply 360 by 0.10 which gives us 36, all we have to do is add the 36 to 360 to get our final answer of $396.
Which list orders the numbers from least to greatest?
Negative 2.4, negative 1.5, negative 2 and one-fourth, negative 3, negative 1 and one-eighth
A number line going from negative 4 to positive 4.
Negative 1 and one-eighth, negative 1.5, negative 2 and one-fourth, negative 2.4, negative 3
Negative 3, negative 2.4, negative 2 and one-fourth, negative 1.5, negative 1 and one-eighth
Negative 3, negative 2 and one-fourth, negative 2.4, negative 1 and one-eighth, negative 1.5
Negative 1.5, negative 1 and one-eighth, negative 2.4, negative 2 and one-fourth, negative 3
Negative 3, negative 2.4, negative 1.5, negative 2 and one-fourth, negative 1 and one-eighth
Hope my answer helps you✌️
HII I NEED HELPP :DD (thanks)
Answer:
288 m^2
Step-by-step explanation:
Total m^2 of the rectangle would be (14+3) * (3+12+3)
Which is 306 m^2
Subtract the smaller squares
306 - (3*3) = 297
297 - (3*3) = 288 m^2
Vega swam her leg of the race in 27.98 seconds and Janice swam her leg of the relay race in 25.679 seconds. What was their combined time for their part of the relay? A. 2.301 seconds B. 28.477 seconds C. 53.669 seconds D. 53.659 seconds
Answer:
D.53.659
Step-by-step explanation:
27.98+25.679 = 53.659
15 POINTS IF SOMEONE ANSWERS QUICK
Answer:
The 16 cases will fit the box as shown.
Step-by-step explanation:
One disk case has the dimensions 14.2 cm by 19.3 cm, with thickness 1.6 cm.
Temporarily ignoring the 14.2 cm and 19.3 cm measurements, we multiply this 1.6 cm thickness by 16, obtaining a total thickness for the stack of cases of 25.6 cm.
1) The 16 cases, arranged as shown, and measuring 25.6 cm from left to right in this diagram, will fit within the 26 cm horizontal distance shown.
2) The horizontal length of each case is 14.2 cm. Stacked as shown, the 16 cases will fit within the 15 cm depth of the box.
3) The vertical measurement of each case is 19.3 cm. The 20 cm vertical measurement of the box can accommodate this 19.3 height within 20 cm.
All indications are that the 16 cases will fit comfortably inside the box.
Answer:
16 discs capacity of the cuboid.
Step-by-step explanation:.
for simplicity...
i would just divide 26cm to 1.6cm = 16 .25
therefore, 16 discs capacity of the cuboid.
In two days, megan has read 62 pages of James and the Giant Peach. the book has 194 pages. if p represents the number of pahes Megan has left to read, which equation represents the situation?
A: 2p + 62 = 194
B: 194 - p = 62
C: 2p = 132
D: 132 - p = 194
Olly plans to purchase a watch with an original price of $78. The
watch is discounted 15% and Olly has a 5% off coupon to apply.
How much will Olly pay for the shirt?
this is 6th grade math
would be happy if you helped me
i need a step-by-step explanation to help me later on !
Answer: 72
Step-by-step explanation:
I counted one of the sides then took all of the answers and divided it by 12
Answer: 70
Step-by-step explanation: so first you cout all of the whole squares and then you add up all the portions of squares. hope this helps/ let me know if wrong
Find the distance between (–4, –2) and (–4, 3). Write your answer as a number with no label.
Answer:
5
Step-by-step explanation:
To solve this problem we could find the distance between -2 and 3. (We can do this because the x values are the same).
On a number line, this distance is 5. So the answer is 5.
Answer: 5 should be it .
Step-by-step explanation:
From the set {8, 24, 72}, use substitution to determine which value of x makes the inequality true.
x ÷ 8 > 3
A.
72
B.
8
C.
24
D.
none of these
Robin and Evelyn are playing a target game. The object of the game is to get an object as close to the center as possible. Each player’s score is the number of centimeters away from the center. Robin’s mean is 107, and Evelyn’s mean is 138. Compare the means. Explain what this comparison indicates in the context of the data. Who is winning the game? Why?
ANSWER BELOW for 1st one:
Eveyn's Robins
means : 138 means: 107
So Eveyns mean is greater than Robins beacuse 138 is greater than 107
- THXS FOR LOOKING AND ANOTHER ANSWER IF YOU DONT WANT TO USE THE FIRST ONE PLUSE THEY ARE BOTH RIGHT
Answer for 2 one : Evelyn has the greater mean. It indicates that, on average, her objects landed farther away from the center than Robin’s. This difference means that Robin is winning the game.
Answer:
Robin is winning the game and the explanation for the answer is :
Step-by-step explanation:
core represents the number of centimeter each player is away from the center. Given the mean of Robin = 107 and mean of Evelyn = 138
And, as it is mentioned that the player whose object lands more close to the center wins the game.
Evelyn has the greater mean. It indicates that, on average, Evelyn objects landed farther away from the center than Robin's.
Therefore, this difference means that Robin is winning the game.
PLS help me 30p + brainlyest
Answer: is five over 8
Step-by-step explanation:
Answer: 8 over 5 :p
Step-by-step explanation:
Using a directrix of y = −2 and a focus of (2, 6), what quadratic function is created?
here are the answers given
\/
f(x) = −one eighth (x − 2)2 − 2
f(x) = one sixteenth (x − 2)2 + 2
f(x) = one eighth (x − 2)2 − 2
f(x) = −one sixteenth (x + 2)2 − 2
Answer:
f(x)=1/16(x-2)^2+2
Step-by-step explanation:
The Equation can be written like this:
f(x) = 1/(4p)(x -h)^2 +(k-p)
where (h, k) is the focus, and p is half the distance between focus and directrix. Here, (h, k) = (2, 6) and p=(6-(-2))/2 = 4. So the equation is ...
f(x) = 1/16(x -2)^2 +2
Help please
I think its the distributive property
Answer:
Assiociative Property
Step-by-step explanation:
Distributive Property is ( example) : 9( 4+5) = 9(4) + 9(5). You distribute the value outside in to both of the values in the paranthesis.
Associative property : I schanging the groupng - like (6+3) + 7 = (7+3)+6.
Larry mows lawns for $50 an hour. Last week, he gave all his customers a 20% discount off his hourly rate. Mrs. Grinnell hired Larry last week to mow her lawn, and Larry applied a 10% new customer discount to his already discounted rate. If Larry worked on Mrs. Grinnell's lawn for 3 hours, how much does Mrs. Grinnell owe Larry?
A
$60
B
$102
C
$105
D
$108
Ray and Kelsey have summer internships at an engineering firm. As part of their internship, they get to assist in the planning of a brand new roller coaster. For this assignment, you help Ray and Kelsey as they tackle the math behind some simple curves in the coaster's track. Part A The first part of Ray and Kelsey's roller coaster is a curved pattern that can be represented by a polynomial function. Ray and Kelsey are working to graph a third-degree polynomial function that represents the first pattern in the coaster plan. Ray says the third-degree polynomial has 4 intercepts. Kelsey argues the function can have as many as 3 zeros only. Is there a way for the both of them to be correct? Explain your answer.
Answer:
Part A
Kelsey is doing the o's which is correct within a graph and Ray is doing the y-intercept which is also correct. This means that Both are correct because of the data in the graph Both of them are specific within using the graph to help them
Step-by-step explanation:
MAKE SURE TO SHOW YOUR WORK!!!!!
Answer:
The mean of Quiz 2 scores is greater than the mean of Quiz 1 scores, but variability is the same.
\({ \tt{quiz \: 1}} : { \tt{ \frac{70 + 91 + 85 + 87 + 73 + 74 + 77 + 83}{8} }} \\ = 80 \\ \\ { \tt{quiz \: 2}} : { \tt{ \frac{75 + 82 + 78 + 96 + 92 + 79 + 90 + 88}{8} }} \\ = 85 \)
\( \\ \\ { \underline{ \blue{ \tt{⚜becker \: jnr}}}}\)
If you help me and your the 1st to get it right I mark you Brainliest, I heart you , and I friend you!
Answer:
10% of 100 is 10
you're welcome u-u
A recipe for 60 cookies calls for 1 pound of butter. How much butter is needed to make 2 dozen cookies? Write answer as a fraction using /, or decimal.
Answer:0.4 lbs of butter
Step-by-step explanation:
60/12 is 5
That is how many dozens that use 1 pound of butter
Then 1/5 is 0.2
That is how much pounds of butter is in one dozen
0.2*2 is 0.4
That is two dozens
pls help on this too
Earn points, answer both questions!
Answer:
Area of five squares = 1289.09 square units
Perimeter = 194.6 units
Step-by-step explanation:
Area of square and perimeter:
First find the length of each square, then find the area of each square.
To find the area of five squares, add all the area of each square.
Side of square1 = 27 units
\(\sf Side \ of \ square2 = \dfrac{2}{3}*27=2*9 = 18 \ units\\\\Side \ of\ square3= \dfrac{2}{3}*18=2*6=12 \ units\\\\Side \ of \ square4=\dfrac{2}{3}*12=2*4=8 \ units\\\\Side \ of \ square5=\dfrac{2}{3}*8=\dfrac{16}{3}=5.3 \ units\)
Area of square1 = 27*27 = 729 square units
Area of square2 = 18*18 = 324 square units
Area of square3 = 12*12 = 144 square units
Area of square4 = 8*8 = 64 square units
Area of square5 = 5.3*5.3 = 28.09 square units
Area of five squares = 729 + 324 + 144 + 64 +28.09
= 1289.09 square units
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Perimeter of the composite figure = (27 + 27+27+9) + (18+18+6) +(12+12+4) + (8+8+2.7)+ (5.3+5.3+5.3)
= 90 + 42 + 28 + 18.7 + 15.9
= 194.6 units
PLS HELP ME I WILL GIVE YOU BRAINLIST!!!!
the scale of a map is 1:1,000,000. what is the real distance between two points, given the following distances between them on the map? 1.8 decimeters ?km
Answer:
Step-by-step explanation:
6 km
Help pls. Also wdym this is to short yk why so long >:/
Answer:
Y= mx + b
so Y = 1/3x + 2
just substitute