Answer:
D: x=-4
Step-by-step explanation:
if w varies jointly as x and y,
and w=10 when x=2 and y=1.
Solve for w when x=4 and y=2
Given:
w varies jointly as x and y.
w=10 when x=2 and y=1.
To find:
The value of w when x=4 and y=2.
Solution:
w varies jointly as x and y.
[tex]w\propto xy[/tex]
[tex]w=kxy[/tex] ...(i)
Where, k is the constant of proportionality.
w=10 when x=2 and y=1.
[tex]10=k(2)(1)[/tex]
[tex]10=2k[/tex]
[tex]\dfrac{10}{2}=k[/tex]
[tex]5=k[/tex]
The value of k is 5.
Putting k=5 in (i), we get
[tex]w=5xy[/tex]
To find the value of w when x=4 and y=2. Put x=4 and y=2.
[tex]w=5(4)(2)[/tex]
[tex]w=40[/tex]
Therefore, the value of w is 40 when x=4 and y=2.
a) Write 5.1 x 10^-1as an ordinary number.
Answer:
0.51
Step-by-step explanation:
the number of employees for a certain company had been decreasing each year by 8%. If the company currently has 860 employees and this rate continues, fund the number of employees in 19 years.
860(1-(8)/(100))^(19) solve that
Find the value of x. Your answer must be exact.
х
45° 18
Answer:
x = 63
Step-by-step explanation:
Simplifying
x + -18 = 45
Reorder the terms:
-18 + x = 45
Solving
-18 + x = 45
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + x = 45 + 18
Combine like terms: -18 + 18 = 0
0 + x = 45 + 18
x = 45 + 18
Combine like terms: 45 + 18 = 63
x = 63
Simplifying
x = 63
Clear x.
5x-5 one
———= ——-
X-2 3
Answer:
5x-5 = 5(x−1)
X-23 = =x−23
Step-by-step explanation: hope this help
X-y=0 and 5x-2y=6 solve by elimination
Answer:
(2,2)
Step-by-step explanation:
first take x-y=0 and multiply it by -5 you will then get this
-5x+5y=0
5x-2y=6
add those together
3y=6
divide by 3
y=2
now plug 2 in for y
x-2=0
add 2 to both sides
x=2
Over what interval is f(x) negative? Justify your answer.
Answer in interval notation is (-3, 1)
This is the same as saying -3 < x < 1
=====================================================
Explanation:
Since y = f(x), this means we're looking for points on the red curve such that they have a negative y coordinate. Visually, we're looking for points that are below the horizontal x axis.
These points are shown in the diagram below. I've marked the section we're after in blue. This blue section spans from x = -3 to x = 1. We exclude both endpoints because each x value leads to f(x) = 0, but we want f(x) values smaller than zero.
BRAINLIEST FOR THE CORRECT AWNSER! Algebra 1 What is the solution to the system of equations graphed below?
Answer:
(-2, 3)
Step-by-step explanation:
The solution to a system of equations is the value (or values) of x and y that satisfy both equations. we can find the value of x by setting the right sides of each of our equations equal to each other and solving:
[tex]4x+11=-2x-1\\6x=-12\\x=-2[/tex]
From here, we can simply substitute -2 for x in either of the equations to calculate y. I'll choose the bottom one:
[tex]y=-2(-2)-1\\y=4-1\\y=3[/tex]
So our solution is (-2, 3).
The awnser is A!! Because the graph describes as so.
KEVI is an isosceles trapezoid.
If KN 10, NV = x, and IE = 2x+6,
what is the length of KV?
Answer:
14
Step-by-step explanation:
A trapezoid is a quadrilateral (has four sides and four angles) with a pair of opposite parallel sides. The pair of opposite parallel side is known as the base.
An isosceles trapezoid is a trapezoid with equal legs. The diagonals are also equal and both the upper and lower base angles are congruent.
From the question:
KV = IE = 2x + 6 (diagonals of a trapezoid are congruent)
From line segment addition postulate:
KV = KN + NV
substituting:
2x + 6 = 10 + x
2x + 6 - x = 10
x + 6 = 10
x = 10 - 6
x = 4
KV = 2x + 6
substituting x = 4:
KV = 2(4) + 6
KV = 14
15(2x+2)=10(3x+4) equations with special cases
Answer:
no solution
Step-by-step explanation:
15(2x+2)=10(3x+4) Distribute.
30x+30=30x+40 Subtract 30x from both sides.
-30x -30x
30=40
30 does not equal 40, so there is no solution.
Hope this helps!! Have a great day C:
Solve for the variable. (g + 6)/3 = 11
solve the variable:-[tex]\sf{\dfrac{(g+6)}{3}=11 }[/tex]
Answer:
[tex]\green{\boxed{g=27 }}[/tex]
Explanation::[tex]\longrightarrow \bold{\dfrac{(g+6)}{3}=11 }[/tex]
:[tex]\longrightarrow \bold{ g+6=11\times 3 }[/tex]
:[tex]\longrightarrow \bold{g+6=33 }[/tex]
:[tex]\longrightarrow \bold{ g=33-6 }[/tex]
:[tex]\dashrightarrow\bold{g=27 }[/tex]
How much is 2000mg in grams?
Answer:
2 grams
Step-by-step explanation:
A carpenter cut a 6 1/2 -ft board into
1 1/4-ft sections. What is the number of sections he cut?
Answer:
5 pieces
Step-by-step explanation:
help
please i’ll mark brainliest
Answer:
d
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
PLEASE HELPPPP QUICK 100 POINTS ASAP PLEASEE
Graph a line representing the proportional relationship with slope 3 containing the point (2,6)
Answer:
i think you had it on the point
Step-by-step explanation:
Help me! I need help finishing this before it’s due!
Answer:
I think F is the right answer
perfume is sold in two diffrent sizes of bottle.
Answer: get the 2 perfums in the size 50ml
Step-by-step explanation:
80ml is 55 pound
50 ml is 45 pound
2nd is half of 45 pound which is 22.5
the 2 perfum in the size 50 ml with the special price is: 45 + 22.5 = 67.5 now per ml is 0.675 pound per ml i found the price per pound by dividing the ml by the price
for the 80ml the price per ml is 0.6875
Solve the inequality
- 7x<35
What are the solutions? Select the correct choice below and fill in the answer box to complete your
choice.
A. X > greater or equal to
B. X <
C. X < less than or equal to
D. X >
Answer:
X>-5
Step-by-step explanation:
Megan and her little sister, Nora, counted their Halloween ca 20 out of the 50 candy pieces were taffy. In Nora's bag, 11 out of the 25 pieces were taffy. Who got the greater ratio of taffy to total candy pieces?
Answer:
i think megan
Step-by-step explanation:
Answer:
Im pretty sure Nora has a better ratio of candy
Given \(\triangle DEF\ :\ \triangle RST\), find the scale factor.
Answer: The required scale factor[tex]=\dfrac43[/tex]
Step-by-step explanation:
Formula : [tex]\text{Scale factor }=\dfrac{\text{Side in image}}{\text{Corresponding side in pre-image}}[/tex]
Here, ED = 3 units in Δ DEF which corresponding to SR = 4 units in ΔRST
Now,
Scale factor for the given transformation = [tex]\dfrac{SR}{ED}[/tex]
[tex]=\dfrac{4}{3}[/tex]
hence, the required scale factor[tex]=\dfrac43[/tex]
please help√√√:-) 1111
Answer: 1246 for the first and 1400 for the second
Step-by-step explanation:
PLEASE HELP
FIND THE LENGTH OF RS.
Answer:
A
Step-by-step explanation:
Distance between 2 points
[tex] = \sqrt{(x1 - x2)^{2} + (y1 - y2)^{2} } [/tex]
☆ (x₁, y₁) is the first coordinate while (x₂, y₂) I'd the second coordinate.
Length of RS
[tex] = \sqrt{ {[ - 1 -( - 4)] }^{2} + (9 - 1)^{2} } \\ = \sqrt{( - 1 + 4)^{2} + 8^{2} } \\ = \sqrt{ {3}^{2} + 64 } \\ = \sqrt{73} \\ = 8.54 \: (3 \: s.f.)[/tex]
Thus, RS is about 8.5 units.
Answer:
I believe its A. 8.5
Step-by-step explanation:
Choose a method that can be used to solve this system of equations by elimination.
2x - 2y = 24
4x + 7y = -40
1. Subtract 2x from both equations and solve the first equation for y.
2. Multiply the first equation by -2 and add the second equation.
3. Add the first equation to the second equation and subtract 6x from both sides of the equation.
4. Subtract 7y from the second equation and add the first equation.
Which one of these steps is the correct way of solving by elimination?
Answer:
2
Step-by-step explanation:
if we multiply the first equation by neg 2, the 4x's cancel out.
The method that should be selected is
2. Multiply the first equation by -2 and add the second equation.
Elimination method:In the elimination method, we can either add or subtract the equations to get an equation in one variable. At the time When the coefficients of one variable are opposites, so we can add the equations to eliminate a variable and when the coefficients of one variable are equal we can subtract the equations to eliminate a variable.
Learn more about an equation here: https://brainly.com/question/17599700
How do you solve this?
-1 1/2+ 2 1/8
multiply. (x^2-5x+2)(3x^2+2x+3)
Answer:
3x^4-13x^3-x^2-11x+6
Step-by-step explanation:
Checked this on a website for you btw!
Answer:
3x^4-13x^3-x^2-11x+6
Step-by-step explanation:
What kind of angles are 1 and 5 in the picture below?
Answer:
Step-by-step explanation:
I dont see anything. You need to click link and attach a picture or the image to the question
Answer:
You need to add the picture so we can answer
Step-by-step explanation:
Turn this equation into a sentence: 5x - 8 - 7
Answer:
5 times x minus 8 minus 7
Step-by-step explanation:
whenever you see an x right next to a number, it means that it's being multiplied for that number. For example: 2x mean 2 times x
This symbol - is a minus symbol. So when it's in front of a number, you say "minus" and then the number. For example: 4 - 3 means, Four minus three.
Find the possible values for m<1
Answer:
its the last choice
Step-by-step explanation:
you can't find the exact angle with the given info so option 1 is automatic out, m<1 is also clearly an obtuse angle so it will be larger then 90° so option 2 is out, and like I said before m<1 has to be larger then 90° so its not option 3 leaving only option 4
Suppose that 20% of students at high school A and 18% of students at high school B participate on a school athletic team. Independent random samples of 30 students from each school are selected and asked if they participate on a school athletic team. Let ˆ p A represent the sample proportion of students at school A who participate on a school athletic team and ˆ p B represent the sample proportion of students at school B who participate on a school athletic team.
What is the mean of the sampling distribution of ˆ p A − ˆ p B ?
Answer:
0.02
Step-by-step explanation:
High schools A :
Percentage of participants in on the school athletic team = 20%
Pa = 20% = 0.2
High school B:
Percentage of participants in on the school athletic team = 18%
Pa = 18% = 0.18
The mean of sampling distributon is :
Pa - Pb
0.2 - 0.18
Hence, Mean of sampling distribution is 0.02
HELP ME because it is hard