Which equation can be used to solve for the rate, r, for Sam to change all the light bulbs in the office building by himself? 3r = 3 r equals StartFraction 3 Over 8 EndFraction. 3r + 3 r plus StartFraction 3 Over 8 EndFraction equals 1. = 1 r + StartFraction 1 Over 3 EndFraction r plus StartFraction 3 Over 8 EndFraction r equals 1.R = 1 r + StartFraction 1 Over 3 EndFraction r plus StartFraction 1 Over 8 EndFraction r equals 1.R = 1
Answer:
3r + 3/8 = 1
r = 5/24
Step-by-step explanation:
Working together, sam and charlie can change all the light bulbs in the office building in 3 hours. it would have taken charlie 8 hours to do the job alone.which equation can be used to solve for the rate, r, for sam to change all the light bulbs in the office building by himself?
For the rate, r, for sam to change all the light bulbs in the office building by himself?
One job is involved
3r + 3/8 = 1
3r = 1 - 3/8
r = 1/3 - 3/8÷3
= 1/3 - 3/8 × 1/3
= 1/3 - 1/8
r = 1/3 - 1/8
r= 8-3/24
r = 5/24
B got it right on edge 2020
Simplify (-6x4 - 5x3 + x2) + (4x2 + 6x4 - 4x3)
Answer:
-x2*(9x-5)
Step-by-step explanation:
If you need an explanation I will happily write it out for you
Answer:
-x2*(9x-5)
Step-by-step explanation:
Sam decides to download some new music. She downloaded 3 albums and 10
singles, and her total was $61. The next day she purchased more music from the
same retailer and downloaded 6 more albums and 8 singles for a total of $74.
Assuming that all albums and singles are the same price, how much did she spend on
each album and each single? Write a system of equations to represent this
situation. Then solve for the solution using the elimination method.
Answer:
An album costs $7 while a single cost $4
Step-by-step explanation:
Let the amount spent on singles be $x while the amount spent on albums be $y
First day, she downloaded 3 albums and 10 singles that cost $61
Hence;
3y + 10x = 61 ••••••••(ii)
Second day, she downloaded 6 albums and 8 singles for $74
8x + 6y = 74 ••••••••(ii)
We now want to use elimination method to solve both equations
Multiply equation i by 2 and ii by i
20x + 6y = 122
8x + 6y = 74
Subtract ii from i now
12x = 48
x = 48/12
x = 4
Recall;
3y + 10x = 61
substitute for x
3y + 10(4) = 61
3y + 40 = 61
3y = 61-40
3y = 21
y = 21/3
y = 7
An album costs $7 while a single cost $4
It takes 4 people 10 hours to plaster a section of a building. How long will it take 8 people to
do the same job working at the same rate?
Answer:
5 hours
Step-by-step explanation:
Answer:
5 hours because you have double the people which means it would take half the time :)
Hope this Helps! :)
Have any questions? Ask below in the comments and I will try my best to answer.
-SGO
the figure below is a rhombus y = ?
Answer:
y = 28°
Step-by-step explanation:
The opposite angles of a rhombus are congruent.
The diagonal divides the rhombus into 2 isosceles triangles, as all sides are congruent.
Thus the triangle containing base angles y and w has vertex = 124°
Since the triangle is isosceles then the base angles are congruent , thus
y = [tex]\frac{180-124}{2}[/tex] = [tex]\frac{56}{2}[/tex] = 28°
Mark has $146 in his savings account. He withdraws $41, deposits $98, and then withdraws $64. Find the balance of his account.
What's the answer?
Answer:
$139
Step-by-step explanation:
subtract 41 from 146
=105
add 98
=203
subtract 64
=139
what is the value of 6x (power of 2) when x=1.5
−914+27. Write your answer as a fraction in simplest form
Answer:
2 goes into 94 whole times with 1 leftover, what does this mean?
Step-by-step explanation:
you turn 27 and 914 into fractions and add, then you simplify and well you know the answer.....right .....
Write the word sentence as an equation. Then solve.
10 more than a number c is 3.
Answer:
10 +c=3
C=3-10
C=-7
.....
Answer:
c = -7
first, make the equation.
10 more than a number c is 3
the variable is c, according to the sentence.
c
"10 more than a number c"
c + 10
"10 more than a number c is 3 "
c + 10 = 3
now that you have your equation, time to solve it.
it's important to know that if you do something to an equation, as long as you do it to both sides the equation is still true.
for example.
2 + 2 = 4
if you add 1 to both sides of the equation,
2 + 2 + 1 = 4 + 1
5 = 5
this is still true.
Solving the equation.c + 10 = 3
subtract 10 from both sides of the equation.
c + 10 - 10 = 3 - 10
c = 3 - 10
c = -7
that are also equivalent to 0.5 + 10b + 4 = 19.5
A.106 +4= 19.5
B.10b + 4 = 19
C.2 (0.5 + 106 + 4) = 39
D.10b 19.5
E.10b = 15
Answer:
a⋅0.5+10b+4=19.5=a=−20b+31 ♀️I think that's the way I'm not sure!
3x-(2x+4)
I need help
Answer:I think it is -18
Step-by-step explanation:sorry if I got it wrong
3) Consider the following linear equations:
y = x - 4 and -8y = 8x - 32
What are the intercepts of the line y=x-4 ?
x-value of x-intercept _____
y- value of y-intercept _____
2a(b + c) = d , Solve for b
Answer:
b=d/2a -c
Step-by-step explanation:
b+c=d/2a (Divide 2a on both sides to elimnate the 2a on the left side)
b=d/2a -c (Subtract c on both sides to elimnate the c on the left side)
Answer: b=d/2a -c
Hope this helps!
Round 27.977 to the nearest hundredth.
Answer
Answer:
27.98
Step-by-step explanation:
the second seven 27.9(7)7 is the hundreth place, so sense 7 is above five we round up to and eight, then get rid of the number after it
Suppose each stock in Andre’s portfolio has a correlation coefficient of 0.40 (rho = 0.40) with each of the other stocks. The market’s average standard deviation is approximately 20%, and the weighted average of the risk of the individual securities in the partially diversified four-stock portfolio is 39%. If 40 additional, randomly selected stocks with a correlation coefficient of 0.30 with the other stocks in the portfolio were added to the portfolio, what effect would this have on the portfolio’s standard deviation?
Answer:
Explained below.
Step-by-step explanation:
The correlation coefficient for the portfolio with each of the other stocks is 0.40.
This correlation coefficient is less than 1. This implies that the portfolio’s assets are weakly correlated with each other.
The portfolio profits from modification. Randomly selected stocks are added to the portfolio.
The correlation coefficient of these stocks with the other stocks in the portfolio is about 0.30.
Therefore adding these randomly selected stocks will decrease the portfolio’s standard deviation.
Company-specific risk in portfolio can be reduced by this diversification but systematic or market risk can’t be eliminated. Thus the risk will (σ) decrease slowly until σp reaches to the average standard deviation of returns on the market i.e. about 20 %.
HELP ANYBODY IMMA DROP OUTTT
Question * In pic :D *
Answer:
The answer to this is 27/8 :)
3 ⅜
is (3×8 + 3) / 8
= (24+3) / 8
= 27/8
What is the slope of the line represented by the following equation?
y= 1/3x + - 2/3
A) -1/3
B)-2/3
C)1/3
D)2/3
(2x−6)+4(x−3) i need help as fast as possible explain and answer pls
Answer:
6x-18
Step-by-step explanation:
(2x-6) + 4(x-3)
(2x-6) + (4x-12)
2x - 6 + 4x - 12
6x-18
Answer:
6x-18 (simplified)
Step-by-step explanation:
Together, Matthew and Daniel have 67 DVDs. Matthew's collection has 3 times as many DVDs as Daniel's collection. Write an algebraic equation can be used to determine the number of DVDs in Daniel's collection. Use x as your variable.
4x=67 is the equation can be used to determine the number of DVDs in Daniel's collection.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given that Together, Matthew and Daniel have 67 DVDs.
M+D=67
Let x represents the number of DVDs
Matthew's collection has 3 times as many DVDs as Daniel's collection.
M=3D
Now M=D=x
As Matthew and Daniel have 67 DVDs.
3x+x=67
4x=67
Hence, 4x=67 is the equation can be used to determine the number of DVDs in Daniel's collection.
To learn more on Equation:
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Need help fast! Algebra
Answer:
5)y=2x 6)y=12x 7)y=3x-2 8)y=1/4x+2
Step-by-step explanation:
Look at the y-intercept first if crosses the origin then don't need to write anything. If it does you add it after the slope.
To find slope you can count how many units up or down it does and how many left or right.
Then write i as rise/run.
Hope this helps
Find 33,688 divided by 8.
What is 8455 divided by 89?
Answer:
95
Step-by-step explanation:
8455/89 is 95
Write the equation of the line that passes
through the point (-6, 5) and has a slope of 2/3
in point-slope form.
Answer:
y-5=2/3(x+6)
Step-by-step explanation:
What is 7/8 minus 6 3/4
Answer:
(7/8) - (6 3/4) = -5.875
$20 is 2% of what #?
Answer:
1000$
Step-by-step explanation:
2%=20
1%=20/2=10
100%=10×100=1000
Lorenzo caballero was just hired as an engineer for saxon engineering his starting salary is $57600 annually what is his semimonthly salary
d + 12 = 14 - 2d
Find d
Answer:
d = 2/3
Step-by-step explanation:
Answer:
I believe d=0.6666667 or 2/3
Step-by-step explanation:
d=2-2d
3d=2
d=0.66
A. It has point symmetry.
B. It has rotational symmetry with an angle of rotation of 120°.
C. It has reflectional symmetry with five lines of symmetry.
D. It has no rotational symmetry.
HELP WILL MARK BRAINLIEST.
Answer: C. It has reflectional symmetry with five lines of symmetry.
The five lines of symmetry are shown in the diagram below. Each line splits a flower petal in half. Each line also splits the entire flower in half. In other words, reflecting one half of a flower over any given line of symmetry, generates the other half of the flower.
The correct answer is C. The given figure has reflectional symmetry with five lines of symmetry.
Symmetry refers to the property of an object remaining unchanged when certain transformations are applied to it.
A. Point symmetry, also known as rotational symmetry, means that the object looks the same when rotated by a certain angle around a central point. However, a given figure does not have point symmetry since it does not look the same when rotated by any angle around a central point.
B. The statement that the flower has rotational symmetry with an angle of rotation of 120° is incorrect because, as mentioned above, it does not possess rotational symmetry.
C. The flower does have reflectional symmetry with five lines of symmetry. This means that the flower can be divided into five equal parts using five lines of reflectional symmetry, such that each part is a mirror image of the other.
D. The statement that the flower has no rotational symmetry is correct, as mentioned in A and B.
Therefore, the correct answer is C. It has reflectional symmetry with five lines of symmetry.
Learn more about reflectional symmetry here
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y=2x+5
solve for y and x
Answer:
x = (2.5, 0) y = (0, 5)
Step-by-step explanation:
You worked 5.5 hours one day and 3 hours another day. You had 8 dollars already and now that you have been paid, you have $84.50. How much were you paid an hour
Answer:
u were paid 9 dollars an hour
Step-by-step explanation: