Answer:
[tex]x+2y-z=5 ...(1)\\ -x-y+2z=-13...(2) \\ 2x+y-2z=14...(3) \\ \\ add \: (2) + (3) \\\boxed{x= 1} \\ 2 \times (1) + (2) \\ x + 3y = - 3 \\ 1 + 3y = - 3 \\ 3y = - 4 \\ \boxed{y = - \frac{4}{3} }\\ solve \: for \: z \\ x + 2y - z = 5 \\ 1-\frac{4}{3}(2)-z=5\\3-8-3z=15\\3z=-20\\\boxed{z = - \frac{20}{3} }[/tex]
8x - 8 - x = 3 (6 - 2x)
Answer:
x = 2
Step-by-step explanation:
8
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8
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3
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6
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{\color{#c92786}{8x}}-8{\color{#c92786}{-x}}=3(6-2x)
8x−8−x=3(6−2x)
7
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8
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6
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Help pleaseeeeeeeeeeeeeeeeee
Answer:
Step-by-step explanation:
22
Two trains leave stations 420 miles apart at the same time and travel toward each other. One train travels at 65 miles per hour while the other travels at 85
miles per hour. How long will it take for the two trains to meet?
Do not do any rounding.
Answer:
2hr 48 minutes
Step-by-step explanation:
65t + 85t = 420
150t = 420
t = 2 120/150 = 2 4/5 = 2hr 48 minutes
Time taken by two trains to cover 420 miles is 2hr 48 minutes.
Given, that two trains are travelling towards each other.
Relation between speed, time and distance:
Distance = Speed × Time
When the two trains are travelling towards each other the speeds of two trains are added.
When the two trains are moving in same direction then the relative speed is difference of the two.
So, here the trains are moving towards each other.
65t + 85t = 420
150t = 420
t = 420/150
t = 42/15
t = 2hr 48 minutes
Therefore total time required by two trains to meet is 2hr 48 minutes.
Know more about speed, time and distance,
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Work out the following:
a) 3/4 - 7/9 + 2/3
Answer: 23/36
Step-by-step explanation:
[tex]\frac{3}{4} -\frac{7}{9} +\frac{2}{3}[/tex]
You need to find a common denominator.
The common denominator is 36. You have to get all denominators to 36.
How to do that?
Example = [tex]\frac{3}{4} *\frac{9}{9} =\frac{27}{36}[/tex].
Do that to all the fractions.
[tex]\frac{27}{36} -\frac{28}{36} +\frac{24}{36} = \frac{23}{36}[/tex]
Yesterday, Kofi earned 50 Cedis mowing lawns. Today, Kofi earned 60% of what he earned yesterday mowing lawns. How much money did Kojo earn mowing lawns today?
The amount of money that Kojo earn mowing lawns today is 30 cedis
To determine the amount of money that Kojo earn mowing lawns today we are going to multiply the amount she earn by the her earning percentage.
Using this formula
Amount=Earning × Earning rate
Where:
Earning=50 cedis
Earning rate=60%
Let plug in the formula
Amount=50×.60
Amount=30
Inconclusion The amount of money that Kojo earn mowing lawns today is 30 cedis
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Since Kofi earned 60% of what he earned yesterday mowing lawns, today he earned 30 Cedis.
Given the following data:
Amount earned yesterday = 50 Cedis.Percentage today= 60%To find how much money Kojo earn mowing lawns today:
In this exercise, you're required to find the amount of money earned by Kofi, if he was able to make certain amount of money the previous day.
Hence, we would determine what percentage of the money he earned today.
[tex]Today's\;earnings = \frac{60}{100} \times 50\\\\Today's\;earnings = \frac{3000}{100}[/tex]
Today's earnings = 30 Cedis
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I have more questions then this
Answer:
maybe 3 option
Step-by-step explanation:
hope helpful
have a great day
Write an absolute value equation of the form |ax+b|=cx+d that has no solution. Assume that a, b, c and d ≠0
Answer:
|x+1| = x - 1 has no solution.
Step-by-step explanation:
One interpretation of |x - a| is “the distance between the numbers x and a. So |x - b| = c means that the distance between x and b is equal to c . For this to have any solutions, we need c >= 0. When c >0 there will be exactly two solutions, one to the left of b and one to the right of b. When c = 0, the solution is unique: x = b. So, now you should be able to select the only values for b and c that produce the desired set of solutions.
PLZ HELP ME SOMEONE!!!
Answer:
131
Step-by-step explanation:
Hope this helps
Answer:
the answer is 130.9 round it up and you get 131
Step-by-step explanation:
I don’t get this at all help.?
Answer:
Step-by-step explanation:
a) Volume of prism: 6 units x 4 units x 7 units = 168 cubic units
b) Area of shaded base: 4 units x 7 units = 28 square units
Volume of prism: 6 x 4 x 7
The ratio of green pepper plants to red pepper plants in Adeline's garden is 3 to 5. If there are 20 red pepper plants, how many green pepper plants are there?
A. 35
B. 16
C. 12
D. 6
A truck can be rented from Company A for $110 a day plus $0.50 per mile. Company B charges $80 a day plus $0.75 per mile to rent the same truck. Part A: Write an equation to find the number of miles in a day at which the rental costs for Company A and Company B are the same. Part B: Solve the equation.
m=number of miles
A=$110+$0.50m
B=$80+$0.80m
$110+$0.50m=$80+$0.80m Subtract ($80+$0.50m)
$30=$0.30m Divide each side by $0.30
100=m ANSWER: More than 100 miles must be driven per day to make Company A a better deal.
how do i solve this step by step? i dont know how to set up this equation.
Answer:
Step-by-step explanation:
The two long sides on the left and right and bisected into two equal parts each
That means that since there is an angle in common to the top little triangle and the whole diagram, the little triangle on top and the whole triangle are similar.
The ratio of similarity is 1/2
10/(5x + 5) = 1/2 Cross multiply
(5x + 5)*1 = 10*2
5x + 5 = 20 Subtract 5 from both sides
5x = 20 - 5 Combine
5x = 15 Divide by 5
5x/5 = 15/5
x = 3
How much does each piece cost individually?
Answer:
500 for sofa
Step-by-step explanation:
help please?
The janitor at a school discovered a leak in a pipe. The janitor found that it was leaking at a rate of 13 fl oz per hour. How fast was the pipe leaking in gallons per day?
How do you write 0.8 as a percentage?
Answer:
.8 equals 80%
Step-by-step explanation:
To find the percentage you multiply the decimal by 100 so .8 multiplyed by 100 equals 80 or 80%
Thembi leaves school at 07:10 to get to school at 07:45. How long does it take her to school and home each week?
x+5/x^2 = 1/3x - 1/3x^2
Answer:
x= 3√126 /3
Step-by-step explanation:
hope this helps
Please answer this question
Answer:
See explanation below:
see attached file below
Does any one the the answer
Answer:
18 Square Feet
Step-by-step explanation:
ABC is 3 times larger then DEF so you multiply 6 by 3 which gives you 18. Let me know if I'm wrong.
Answer:
18 square feet
Step-by-step explanation:
Because the area of ADEF =6 sq ft
And you have 12ft in A and B
Need help with this...pronto..please
A man is 23 years old. His sister is 11 years old. How many years ago was the man 3 times older than
his sister ?
What is the opposite of -1.2
Answer:
1.2
Step-by-step explanation:
it's so easy it's 1.2
Answer:
The opposite of -1.2 is 1.2
The opposite of a negative number is always a positive number and vice versa.
Hope this helps you!
~Just a joyful teen
[tex]GraceRosalia :)[/tex]
prove cos 2 theta - cos 4 theta + cos 6 theta - cos 12 theta = 4 sin 3 theta sin 5 theta cos 4 theta
Answer:
sorry need lng po
Step-by-step explanation:
pa brainlies
विपरीत अर्थवाले शब्द लिखिए ।
1. नदी २. इच्छा ३. आशा ४. अपकार
Answer:
sorry I can't understand the word
The measure of angle STV is 117°. What is the measure of angle UTV
Answer:
117 - 86 = 31°
The answe is 31
Eight more than the difference of −5s and −6s is equal to the sum of 3 and 7
Answer:
s=2
Step-by-step explanation:
-5s + 6s + 8 = 3 + 7
s + 8 = 10
s + 8 - 8 = 10 -8
s = 2
Suppose a car travels at a rate of 60 miles per hour for 3 hours. How many miles does the car travel?
UPDATE IM DUM IT 180
Answer:
thanks
Step-by-step explanation:
Pablo mixes 3 units white paint and 1 unit black paint to make gray paint
Answer:
Whats the Question?
Step-by-step explanation:
I have more question then this
Answer:
A reflection over the y axis
Step-by-step explanation:
Because reflection is an image produced by or as if by a mirror.
HELP ASAP......find the slope of the line that passes through the two points (-44.42,5.1) and (4.42,4)
Answer:
m ≈ -0.225
Step-by-step explanation:
For points (-44.42, 5.1) and (4.42, 4)
slope = (y2 -y1)/(x2 -x1) = (5.1 -4)/ (-44.42 -4.42) = 1.1 / -48.44 ≈ - 0.225