So if y varies directly as x, and y=21 when x=3. What is x when y=42?
Answer:
x = 6
Step-by-step explanation:
Equation:
[tex]\frac{3}{21} = \frac{x}{42}\\\\Cross - multiply\\\\3 *42 = 21x\\\\126 = 21x\\\\x = 6[/tex]
-Chetan K
I need help this goes towards my grade so please be correct
Answer:
0 us the answer for this question
14.
Jan spent 3 hours doing homework last week.
She spent 5 hours doing homework this week.
How many more hours did Jan spend on homework
this week than last week?
A. 1 hour
B. 1 hour
D. 11 hours
C. 14 hours
Answer:
D. [tex]\mathrm{1\frac{1}{2}\:hours}[/tex]
Step-by-step explanation:
As it asks how many more, it means plus, plus means addition. So, let find the difference between the two fractions.
This week should be at first, and last week should be after the minus sign.
[tex]5\frac{1}{4} - 3\frac{3}{4}[/tex]
[tex]\mathrm{Convert\:mixed\:numbers\:to\:improper\:fraction}[/tex]
[tex]5\frac{1}{4} = 4\times5=20+1=21\\\\\frac{21}{4} \\\\3\frac{3}{4} = 4\times3=12+3=15\\\\\frac{15}{4}[/tex]
[tex]\frac{21}{4} - \frac{15}{4}[/tex]
[tex]\mathrm{Subtract\: the\: numerators,\: not \:the \:denominators.}[/tex]
[tex]\frac{21}{4} - \frac{15}{4}\\\\21-15=6[/tex]
[tex]\frac{6}{4} \\\\\mathrm{\underline{Simplify:}}\: \bold{1\frac{1}{2}}[/tex]
A car salesman has 5 used cars for sale. They have a mean price of $7000. What is the total price of all 5 cars?.
Answer:
Step-by-step explanation:
5 used cars for sale. They have a mean price of $7000
. What is the total price of all 5
cars?
We are given total number of cars = 5 cars.
The mean of all of five cars = $7000.
Note: Total sum/value could be calculated by multiplying mean with the total numbers we have.
Total price = Mean × Total number of cars.
According to problem, mean is 7000 and total number of cars is 5.
Therefore, Total price of all 5 cars = 7000 × 5 = $35000.
We are given total number of cars = 5 cars.
The mean of all of five cars = $7000.
Note: Total sum/value could be calculated by multiplying mean with the total numbers we have.
Total price = Mean × Total number of cars.
According to problem, mean is 7000 and total number of cars is 5.
Therefore, Total price of all 5 cars = 7000 × 5 = $35000.
Sketch the graph of a 4th degree polynomial function f(x) such that f(- 3) = 0, f(- 1) = 0, f(1) = 0 , and f(3) = 0 and f(x) is increasing at extreme left.
Answer:
see attached
Step-by-step explanation:
For each listed root x=p as signified by f(p) = 0, the function has a factor (x-p). The given roots and the given end behavior tell us the factored form is ...
f(x) = -(x +3)(x +1)(x -1)(x -3)
__
The graph is attached. It shows the function increasing at extreme left, crossing the x-axis at x=-3, and again at x=-1, x=1 and x=3. Since it crosses an even number of times, the right-side end behavior is "decreasing" toward negative infinity.
Janet raised $90 of her $60 goal. What percent of her original goal did Janet raise?
Answer:
50% of Her Original goal
Step-by-step explanation:
Can anyone convert the following to an index expression:'
3=log6(216)
9514 1404 393
Answer:
6 = ∛216
Step-by-step explanation:
The equivalent exponential form is ...
6³ = 216
Then the index form is ...
6 = ∛216
Select the values that make the inequality h < 1 true.
(Numbers written in order from least to greatest going across.)
given f(x) and g(x) = f(x) + k, use the graph to determine the value of k.
PLEASE HELP
Answer:
k=5
Step-by-step explanation:
The graph of g(x) is raised by 5 units so k is 5
Find the measure of each angle.
Given: m∠2=x
m∠3=x−16
Solutions:
m∠2=
m∠3=
Answer:
m∠2 = 98°, m∠3 = 82°
Step-by-step explanation:
I'm going to assume this is a straight angle
Supplementary anglesSupplementary angle are two angles that equal 180°
m∠2+m∠3=180°
-Substitutem∠2+m∠2-16=196°
add both side by 16°2m∠2=196°
Divide both sides by 2m∠2=98°
Since we said m∠3 = m∠2 - 16°
m∠3 = 82°
help ? yes ? no ? maybe ?
Answer:
They are proportional
Step-by-step explanation:
Proportionality:
They are proportional because the cost is going up by 10 the entire time and the hours rented is going up by 2 the entire time.
Graphing:
Go to the 2 on the x-axis (horizontal line)
Go up to the 20 on the y-axis (vertical line)
The points to graph are:
(2,20)
(4,30)
(6,40)
(8,50)
I put a pic of what your graph should look like below!
Answer:
To plot the graph put the hours along the x axis and the cost on the y axis. Its a positive realationship because when the hours go up the cost goes up to, it isn't proportional because both values don't go up at the same rate.
Step-by-step explanation:
solve pls brainliest
Answer:
B) y = kx
Step-by-step explanation:
A Proportional relationship should have an equivalent ratio
All of the answers have a pass through the origin except y = kx because k is unknown.
Grady is comparing three investment accounts offering different rates.
Account A: APR of 4.95% compounding monthly
Account B: APR of 4.85% compounding quarterly
Account C: APR of 4.75% compounding daily
Which account will give Grady at least a 5% annual yield?
Answer: Account A
Step-by-step explanation:
Write 63 as the product of prime factors
HOW AM I WRONG???
Answer:
It says in ascending order, and I don't think exponents will work.
Step-by-step explanation:
I think the correct answer would be 3 x 3 x 7, or 3² x 7
The only mistake that I can see is that it is not in ascending order.
-Chetan K
Answer:
3*3*7 or 3^2*7
Step-by-step explanation:
Do you need to have the exponent of 2?
If not, then write it as 3*3*7 or 3^2*7
ΔCDE was translated down and right to form triangle
ΔC′D′E′ Which statements are true? Check all that apply.
Answer:
1) DE ≅ D′E′
2) EC ≅ E′C′
5) D′C′ ≅ DC
6) ΔCDE ≅ ΔC′D′E′
Hope it helps!
Dan was thinking of a number. Dan doubles it and adds 0.8 to get an answer of 58.9. Form an equation with
x
from the information.
Answer:
2x + .8 = 58.9
His number, x, is 29.05
Step-by-step explanation:
2x + .8 = 58.9
2x = 58.1
x = 29.05
For each of the solutions of the equations find two consecutive integers between
which the solution is located :
x²=3
Answer:
0 and 1
Step-by-step explanation:
x² = 3
take the square root of both sides
x = {-√3, √3}
x ≈ {-1.73, 1.75}
Two consecutive integers between 1.73 and 1.75
0 and 1
for brainly help me out
Answer:
2nd answer sounds like the best answer because the rate of change is -1.4.
Step-by-step explanation:
Plug in the equation.
Answer:
[tex]m=-\frac{7}{5}[/tex]
Step-by-step explanation:
B will be considered, "The correct answer" :)
The triangle below is isosceles. Find the length of side x in simplest radical form with
a rational denominator.
x
4
Answer:
4√2
Step-by-step explanation:
as it is an isosceles 2 sides will have the same side length so 4 and 4, therefore you can use pythagoras theorem to solve for x.
do 4²+4²=32 then square root this √32 which is equal to 4√2
The two sides in the isosceles triangle will be the same thus the value of the third unequal side x will be 4√2.
What is a triangle?A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.
In a triangle, the sum of all three angles is 180°
Triangle is a very common figure to deal with our daily life for example in our daily life to measure the height of any tower then there is a huge application of the right angle triangle.
As per the given isosceles triangle.
The angles opposite to equal sides in the isosceles triangle will be the same.
And, The two sides of the isosceles triangle will be the same.
Both perpendicular sides' length = 4
By Pythagoras theorem,
x = √(4² + 4²)
x = √32 = 4√2
Hence "The two sides in the isosceles triangle will be the same thus the value of the third unequal side x will be 4√2".
For more information about triangles,
https://brainly.com/question/2773823
#SPJ2
I need Help on this question
Answer:
Step-by-step explanation:
22/25, 6, 6.21, 137/20, 6.885
Maria decides to reduce her homework time of 8 hours per week by 15%. Calculate her new homework time. Give your answer in hours and minutes. ..
6 hours and 48 minutes
PARALLEL PERPENDICULAR OR NEITHER OR SAME LINE
Answer:
Parallel
Step-by-step explanation:
Solving the equations, we come out to:
A. y = 1/4x + 1
B. y = 1/4x - 1
This would make the lines Parallel because the slope is the same
.3 times the value of 8/4 of positive a witch equals the sum of what
a =34.55
Answer:
I have difficulty understanding the question. I read it as "What is the value of a number that when multiplied by 0.3 times (8/4) is equal to 34.55. This doesn't seem correct, but if it is:
Step-by-step explanation:
(0.3)*(8/4)x = 34.55
(8/4)x = 115.17
x = (4/8)*(115.17)
x = 57.58
21 is the correct answer.
PLEASE HELP ASAP!!!
Parallelogram MNOP is transformed according to the rule . What is the x-coordinate of M”?
-2
-1
1
2
Answer:
1
Step-by-step explanation:
First, we read the notation from right to left, so let's reflect the point M first across the y-axis. Point M would be at the coordinates (5,-1)
Then, let's use translation to move point M left 4 and up 3, Point M will be at (2,1) so the x-value of the Point M is 1.
Hope this is useful.
Answer:
1
Step-by-step explanation:
First, we read the notation from right to left so let's reflect the point M first across the y-axis. Point M would be at the coordinates (5,-1)
Then, let's use translation to move point M left 4 and up 3, Point M will be at (2,1) so the x-value of the point M is 1.
Help
I need help with this part
Answer:
[tex]3)y = kx \\ 4)y = kx \\ 5)y = - kx[/tex]
One yard of ribbon costs $0.49, and 3 yards of ribbon costs $1.49. Which is the better buy?
$0.49 ?
.........................................
Answer:
I think the better one is $1.49
Step-by-step explanation:
That's just my opinion
Evaluate g(x)=4−3x when x=−3, 0, and 5
Answer:
13, 4, and -11
Step-by-step explanation:
g(-3)=4+9=13
g(0)=4+0=4
g(5)=4-15=-11
JELLY BEANS A large jar contains B blue Jelly beans and R red jelly beans. A bag of 100 red and 100 blue jelly beans is added to the jar. What is the ratio of red to blue jelly beans in the Jar?
PLEASE HELP ME. Would very much appreciate it
Answer:
100:100
Step-by-step explanation:
100 reds and 100 blues are in there
I need help ASAP no links and no tricks the one who answers correctly I will mark brainiest. If I got #5 wrong let me know and tell me the right answer and show your work. Ty for ur help ❤️❤️❤️
Answer:
[tex]y=-\frac{4}{3} x+4[/tex]
Step-by-step explanation:
Slope-intercept form is written in [tex]y=mx+b[/tex]
So, to solve, we must separate y onto one side and make its coefficient one.
[tex]4x+3y=12[/tex]
Subtract 4x on both sides.
[tex]3y=12-4x[/tex]
Divide both sides by the coefficient of [tex]y[/tex], which is 3.
[tex]\frac{3y}{3} =\frac{12-4x}{3}[/tex]
Simplify.
[tex]y=4-\frac{4}{3} x[/tex]
Rewrite this equation into standard form by changing the order of [tex]mx[/tex] and [tex]b[/tex]
[tex]y=-\frac{4}{3} x+4[/tex]
Answer
y=4/5 times 2/3
Step-by-step explanation:
Please help me, If you do not know do not answer
Rule for function
If Domains of relation have unique Range then it's function otherwise not a function.
Now
FunctionFunctionRelation/Not a functionNot a function/Relation