Answer:
4.3 hours
Step-by-step explanation:
Let the number of hours Sally does a job = x
Let the number did hours Joan does a job be equal to y
Sally and Joan were able to dust the house in 3 hours together.
1/x + 1/y = 1/3
It takes Joan 10 hours to finish the same job alone.
Hence,
1/x + 1/10 = 1/3
1/x = 1/3 - 1/10
Least common dey = 30
1/x = 10 - 3/30
1/x = 7/30
Cross Multiply
x × 7 = 30
7x = 30
x = 30/7
x = 4.2857142857 hours
Approximately = 4.3 hours
Without help, it would take Sally 4.3 hours to finish the same job.
Muriel says she has written a system of two linear equations that has an infinite number of solutions. One of the equations of the system is 3y = 2x – 9. Which could be the other equation?
2y = x – 4.5
y = x – 3
6y = 6x – 27
y = x – 4.5
Answer: B
Step-by-step explanation: If you divide the 3 Y to get Y by itself, you will divide 3 on both sides. So 2X/3=2X/3 and -9/3=-3
So it will be Y=2X/3-3
Please help!!!
3(x + 8) − 1 = 3x + 4
Answer:No value
Step-by-step explanation:there are no value solutions that make x a solution
Answer:
19
Step-by-step explanation:
3(x+8)-1=3x+3 3x+24-1=3x+4 3x+23=3x+4 3x+19=3x -3x+3x=19
x=19
.Rachel goes shopping at HEB. She buys 1.4 pounds of ground beef. The cost per pound for ground beef is $2.50 per pound. She also buys a can of tomato sauce for $1.99 and a package of spaghetti for $1.75. What was the total amount that she paid for these items?
Jack has $65 to spend on art supplies. He needs to buy an easel that costs $18. He also wants to buy some canvases that cost $11 each
Which of the following inequalities represents the amount of money Jack can spend if he buys n canvases?
A:65 >(line underneath sign)18 + 11n
B:65 > 18 + 11n
С:65 < (line underneath sign) 18 + 11n
D:65 < 18 + 11n
Answer:
C
Step-by-step explanation:
Jack can spend less than or equal to. So C is correct.
The inequality represents the given situation is 65 ≥ 18 + 11n will be correct thus, option (A) is correct.
What is inequality?A difference between two values indicates whether one is smaller, larger, or basically not similar to the other.
In essence, a comparison of any two values reveals whether one is less than, larger than, or equal to the value on the opposite side of the equation.
As per the given,
Total budget = 65
Total spent = 18 + 11n where n is the number of canvases.
Total spent ≤ total budget
18 + 11n ≤ 65
Hence "The inequality represents the given situation is 65 ≥ 18 + 11n will be correct".
For more about inequality,
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The radio hot 97 plays despacito ft Justin beiber every 5 minutes. Another station Z 100 plays despacito every 7 minutes. Both stations at 3:00 pm and time will it be when despacito at the same time
Answer:
The next time they would play despacito on both stations is after 35 minutes.
Hence, 3:00pm + 35
= 3:35 pm
Step-by-step explanation:
The radio hot 97 plays despacito ft Justin beiber every 5 minutes. Another station Z 100 plays despacito every 7 minutes. Both stations at start 3:00 pm and what time will it be when despacito at the same time ?
Find and list multiples of time that despacito plays Radio hot 97 and Station Z 100.
Hence, we find the Multiples of 5 minutes and 7 minutes until the first common multiple is found. This is the lowest common multiple.
Multiples of 5:
5, 10, 15, 20, 25, 30, 35, 40, 45
Multiples of 7:
7, 14, 21, 28, 35, 42, 49
Therefore, the first common multiple is found which is the lowest common multiple is 35
LCM(5, 7) = 35
The next time they would play despacito on both stations is after 35 minutes.
Hence, 3:00pm + 35
= 3:35 pm
Answer:
of course they play despacito that much lol
Step-by-step explanation:
Given f(x) = 9(2 - x), what is the value of f(-3)?
Answer:
Step-by-step explanation: find the exact value by using trigomectric identities
I need help with #18 & 20
Please explain so I understand
please HELP ASAP
What is the missing side, x?
Answer:
76
Step-by-step explanation:
Examine the power 5^3
Answer:
5^3 is the same thing as 5 x 5 x 5. It equals 125
HELP ILL GIVE BRAINLIEST
Answer:
i think its is 1.x 2.x4 3.x9 4.1x-2Step-by-step explanation:
i tride but it will be helpful if you give me brainlits
Please help me before I fail... I really need some help <3 please ;-;
Answer:
sin( 61) = x/55
55(sin(61)) = x
48.1 = x
Hope this helps!
HELP THIS IS DUE IN 15 MINUTE AND I DONT KNOW HOW TO SOLVW IT
Answer:
infinity
Step-by-step explanation:
they are the same line on a graph so they have infinty solutions
CAN YOU PLEASE HELP ME CORRECT ANSWER GETS BRAINLIST !
Answer:
25
Step-by-step explanation:
7^2+24^2=625 the sqr root of 625 is 25
Answer:
Answer is 25
Step-by-step explanation:
[tex]24x^{2} +7x^{2} =25x^{2}[/tex]
He Martins have a solar energy system. The system produces 9.1 Kilowatts of energy each hour. The system produces electricity for 5 hours each day. How much energey, in KWh, will the system produce in 100 day?
Answer:
4550 kilowatt
Step-by-step explanation:
Given that :
Amount of energy produced per hour by solar energy system = 9.1 kw per hour
Number of hours for which electricity is produced per day = 5 hours
How much energy will be produced in 100 days
Number of kilowatt of energy produced per day:
Energy produced per hour * number of hours
9.1 kw per hour * 5 hours = 45.5 Kilowatt per day
In 100 days :
Daily energy produced * number of days
45.5 kilowatt * 100 days
4550 kilowatt
Mrs. Bell can grade 12 papers in 20 minutes. At this
rate, how many papers can she grade in one hour?
Answer:
36
Step-by-step explanation:
solve the equation
1.2²(4a-8)=16
Answer:
I would love to help you because you are my favorite follower. But I do not know the answer. Sorry I feel very guilty
Answer:
Step-by-step explanation:
Solve for t: t - 2 = 10
Question 3 options:
t = 2
t = 8
t = 10
t = 12
Answer: t=12
Step-by-step explanation:
t-2=10
add 2 to both sides of the equation
t=12
Please answer correctly !!!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!
Answer:
106°
Step-by-step explanation:
they are parallel to each other
Answer: 106
Step-by-step explanation:
N-(-7)= 12 how do you rewrite
Answer:
N + 7 = 12
Step-by-step explanation:
When you have a number minus a negative number, it's the same as addition.
Answer:
N=4
Step-by-step explanation:
or N- x -7=12 because
( ) means multiplication
HELP ME PLEASE, ASAP I JUST NEED X !!
Answer:
x = 6 deg
Step-by-step explanation:
14x + 11 = 16x - 1 (corresponding angles, // lines)
-2x = -12
x = 6
Answer:
C
Step-by-step explanation:
16x - 1 and 4x + 11 are corresponding angles and are congruent, thus
16x - 1 = 14x + 11 ( subtract 14x from both sides )
2x - 1 = 11 ( add 1 to both sides )
2x = 12 ( divide both sides by 2 )
x = 6
Substitute x = 6 into either of the 2 equal angles
Substituting into 14x + 11 , then
14x + 11 = 14(6) + 11 = 84 + 11 = 95° → C
What is the solution set of the following equation?
-8x + x + 15 = -7x + 12
Answer:
-3 is the solution set of the following equation
Which expression is equivalent to (5x - 4)2?
Answer:
Step-by-step explanation:
the answer is 25x^2-40x+16
25x^2-40x+16 is equivalent to (5x - 4)^2.
What is multiplication?In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.
here, we have,
(5x - 4)^2
we know,
(a-b)^2= a^2-2ab+b^2
by using this, we get,
(5x - 4)^2
=5x*5x-2*5x*4+4*4
=25x^2-40x+16.
Hence, 25x^2-40x+16 is equivalent to (5x - 4)^2.
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PLEASE HELP !! 10 POINTS AND BRAINLIEST !!!:)
Use intercepts to graph the line described by the equation 2x − 2y = 8.
Answer:
y = x + 4
Step-by-step explanation:
Slope intercept : 2x - 2y = 8 = 2x 2x = 8 + 2y = 2x = 8 +2y = 2x-8 =2y is the sae as 2y = 2x -8 divide everything by 2 = 2x / 2 - 8/2 = 2y/2 = y = x-4
Vicky records the low temperature for three consecutive days. Between the first and second days the temperature increased 6 degrees. Between the second and third days the temperature decreased 3 degrees. On the third day the low temperature was –6º. What was the low temperature on the first day?
Answer:
3
Step-by-step explanation:
-6+6=0
Plus the 3
Your answer is 3
Answer:
-3 or 3
Step-by-step explanation:
The Jefferson band is selling baked goods to raise money for their trip. Their goa; is to profit at least $500. Each baked good sells for 2 dollars but costs $0.50 to make. How many baked goods will they have to sell to reach the goal?
Answer:
Break-even point in units= 334
Step-by-step explanation:
Giving the following information:
Desired profit= $500
Selling price= $2
Unitary variable cost= $0.5
To calculate the number of units to be sold, we need to use the following formula:
Break-even point in units= (fixed costs + desired profit) / contribution margin per unit
Break-even point in units= (0 + 500) / (2 - 0.5)
Break-even point in units= 334
PLSSSSS HELP (brainliest)
What is the slope of the line that contains these points? x 5 6 7 8 y -5 -6 -7 -8
Answer:
-6/5
Step-by-step explanation:
The formula for slope is [ y2-y1/x2-x1 ]. Use two of the given points to solve.
-6-6/-5-5
-12/-10
-6/5
Best of Luck!
Answer:
-1
Step-by-step explanation:
You have to divide with y being on top and x being on the bottom you then get -1
Could an angle be complementary to itself? If so, what would its measure be
Answer:
I think it would be 45 degrees
Answer:
A complementary angle would be two different angles that add up to 90 degrees. If you have an angle of 60 degrees, the other side would have to be 30 to be complementary.
Find the zero of the function f(x) = 5x-3
the point Z(3, -3) is rotated 180 degrees counterclockwise around the origin. what are the coordinates of the resulting point, Z’?
Answer: -3 , 3
Step-by-step explanation:
thank me later;)