Solve this system:
2x+5y+z=3
x-3y+2z=2
-x+2y-3z=-7
Answers
Answer:
x= -3
y= 1
z= 4
Step-by-step explanation:
Please see the attached pictures for the full solution.
*I evaluated the determinants using Sarrus' rule (see last picture):
∆= aei +bfg +cdh -gec -hfa -idb
*The symbol '∆' (delta) is usually used to denote a determinant.
Related Questions
2 Review Homework 2.2.4 Question Help A town has accumulated 5 inches of snow, and the snow depth is increasing by 5 inches every hour. A nearby town has accumulated 7 inches, and the depth is increasing by 2 inches every hour. In about how many hours will the snowfall of the towns be equal?
Answers
Answer:
You need to find the equations for each scenario and set them = to each other
Step-by-step explanation:
A) S = 5t + 5
B) S = 7t + 2
Now set them = and solve for t
5t + 5 = 7t + 2
3 = 2t
t = 3/2 of an hr
To check plug in 3/2 into both equations and you should get same answer.
Hope this helps and never stop striving to learn more!
1-2 [-3/2 (8/9) +11]
Answers
Answer:
Your answer is:
Simplify:
Exact Form: -55/3
Decimal: 18.3
Mixed Fraction: -18 1/3
Step-by-step explanation:
Hope this helped : )
Which pairs of angles in the figure below are vertical angles?
Check all that apply.
Answers
simplify 12*3/12*7 QUICK PLEASE
Answers
Answer:
12*3/12*7= 3/7
Step-by-step explanation:
make it braintliest please
in a class of 30 students 60% said they walk to school
Write a proportion that you could use
to determine the number of students in
the class who walk to school.
Answers
moan and groan a lot ghjiouygbnjkh
The length of a rectangle is 50 meters. This is 6 meters more than twice the width. Find the width.
Answers
Answer:
106 meters
Step-by-step explanation:
50x2=100 100+6=106
Answer: 22
Step-by-step explanation:
50=2x+6
Add negative 6 to both sides (50+ -6) and (6+-6)
Then divide both sides by 2 (2x/2) and (44/2)
That is how you properly solve this 2 step equation
2+2+2......
please help ASAP................
Answers
Answer:
6
Step-by-step explanation:
2*3=6
I did the test
Express this number in standard form.
3.643 x 10^-1 = ?
Answers
Answer:
Solution : Number . In standard form we solve power of 10. Therefore, in standard form is 0.3643
Step-by-step explanation:
hope it helps pls mark as brainliest
Answer:
0.3643
Step-by-step explanation:
Does x=3 make the equation 5x-3=12 true or false?
Answers
Answer:
True
Step-by-step explanation:
5 times 3 equal 15. 15 minus 3 equals 12
What 100000654 divided by 89765
Answers
Answer:
1114.027
Step-by-step explanation:
Suppose that a recent poll found that 50 % of adults in a certain country believe that the overall state of moral values is poor. If a survey of a random sample of 15 adults in this country is conducted in which they are asked to disclose their feelings on the overall state of moral values, complete parts (a) through (e) below.
Answers
Answer: 3.75
Step-by-step explanation:
P=0.50, n=15
np= 0.5x15 gives 7.5
n(1-p)= 15x(1-0.5)=7.5
Both are greater than 5
Then Mean, u=np;15x0.5=7.5
Standard deviation, √np(1-p)
15x0.5(0.5)= 3.75
Given the relation y = 7x^2 + 3, if the input is 4, what is the output? (4 points) 115 116 118 120
Answers
Answer:
115
Step-by-step explanation:
PLug in 4 as the value of x.
7 (4)^2 + 3
7 (16) + 3
112 + 3
115.
The output is 115.
A pizza restaurant charges $10.00 for 1 pizza, $20.00 for 2 pizzas, and $28.00 for 3 pizzas. Based on this information, how much will the restaurant charge for 4 pizzas?
Answers
Answer: $36.00
For every extra pizza, it will cost eight dollars more. So, the fourth pizza will cost $36.00.
Plz mark brainliest:)
The formula for the perimeter of a rectangle is P=2(l+w). Solve for w.
Answers
Answer:
w = p/2 - l
Step-by-step explanation:
Hope this helps!!
Answer:
W=(P-2L)/2
Step-by-step explanation:
W=(P-2L)
Then what ever number you get divide by 2
To get the width
brainliest for correct answers
Answers
Answer:
impossible
unlikely
neither unlikely nor likely
likely
certain
Step-by-step explanation:
Given: -4x + 2y = 8
Prove: y = 4 + 2x
Answers
Answer:
Step-by-step explanation:
-4x+2y=8
2y=8+4x
y=[tex]\frac{8+4x}{2}[/tex]
y=[tex]\frac{2(4+2x)}{2}[/tex]
y=4+2x
proved
write the next three terms of the sequence.
Answers
Answer:
25, 34, 43
Step-by-step explanation:
-11 + x = -2, -11 + 9 = -2 -2 + x = 7, -2 + 9 = 7, 7 + 9 = 16 -2 - x = -11, -2 - 9 = -11 7 - x = - 2, 2 + x = 11, 11 - 2 = 9, 9 = x 7 - 7 = 0 - 2 = -2, 7 + 2 = 9, 7 - 9 = -2
16 + 9 = 25, 25 + 9 = 34, 34 + 9 = 43
J'espère que cela pourra aider : )
7.82 change the decimals to fractions reduced to lowest terms.
Answers
Answer:
7.82 = 391
50
= 741
50
as a fraction
To convert the decimal 7.82 to a fraction, just follow these steps:
Step 1: Write down the number as a fraction of one:
7.82 = 7.82
1
Step 2: Multiply both top and bottom by 10 for every number after the decimal point:
As we have 2 numbers after the decimal point, we multiply both numerator and denominator by 100. So,
7.82
1
= (7.82 × 100)
(1 × 100)
= 782
100
.
Step 3: Simplify (or reduce) the above fraction by dividing both numerator and denominator by the GCD (Greatest Common Divisor) between them. In this case, GCD(782,100) = 2. So,
(782÷2)
(100÷2)
= 391
50
when reduced to the simplest form.
As the numerator is greater than the denominator, we have an IMPROPER fraction, so we can also express it as a MIXED NUMBER, thus 782
100
is also equal to 741
50
when expressed as a mixed number.
Step-by-step explanation:
Answer:
7.82
20
Step-by-step explanation:
hope this helps
If 115% of a number is 460, what is 75% of that number?
Answers
Answer:
300
Step-by-step explanation:
Step 1:
460/115 = x/75 Equation
Step 2:
115x = 34,500 Multiply
Step 3:
x = 34,500 ÷ 115 Divide
Answer:
x = 300
Hope This Helps :)
Ok last one my sis needs help on lol again I’m doing my homework and cAnT HeLp rn pls just help lol
Answers
Answer:
Part A: 15.55
Part B: 0.45
Step-by-step explanation:
Part A:
The giraffe is already 14.29 so when you add the length of its tongue (equation 14.29 + 1.26) then that would equal 15.55
Part B:
The giraffe is trying to eat some leaves that are 16 feet above the ground so you would subtract 16 - 15.55 to see how much farther it needs to reach, so the answer is 0.45.
(This is what I got, I apologize if I get this wrong. If I messed up on something, someone please correct me, thank you and have a nice day!)
Answer:
Part A: It can reach 15.55 feet.
Part B: Need to reach 0.45 feet farther to get to the leaves of a 16 feet tree.
Step-by-step explanation:
giraffe + tongue = reach
14.29 + 1.26 = 15.55
tree height - giraffe reach = extra distance
16 - 15.55 = 0.45 feet
A restaurant has two different seating options: a table and a family booth. A table can seat 4 people, and a family booth can seat 10 people. The restaurant has a maximum capacity of 242 people. If the restaurant has 19 family booths, which inequality could be used to find t, the number of tables in the restaurant?
Answers
Answer:
t ≤ 15
Step-by-step explanation:
Let t = tables
6 * 15 + 2* t ≤ 120
90 + 2t ≤ 120
2t ≤ 30
t ≤ 15
Whats is the answer of 1x3x4x6+1
Answers
Answer:
73
Step-by-step explanation:
Answer:73
Step-by-step explanation:
PLEASE HELP THE ONES I CIRCLE ARE THE ONES YOU DO
Answers
Answer:
1 is a competition, 2 is protection, 5 is division, and 8 is solution.
Step-by-step explanation:
hope these are all correct and you ace this!
10. Write the fraction 9/50 as a decimal. If
necessary, round your answer to the nearest
hundredth.
A 0.28
© 0.5
B 0.18
D 0.09
Answers
Answer:
0.18
Step-by-step explanation:
9/50 is the same as 18/100, we know this because if we multiply both 9 and 50 by 2, it gives us 18/100. 18/100 can be turned into the decimal, 0.18, so your answer is 0.18
I hope this helps :)
Multiply. Enter the product in simplest form.
1/8×2/5
Multiply. Enter the product in simplest form.
2/9×7/8
Multiply. Enter the product in simplest form.
5/8×4/5
Multiply. Enter the product in simplest form.
4/3×2/7
Multiply. Enter the product in simplest form.
7/25×20/21 The product is
Multiply. Enter the product in simplest form.
5/6×1/5 The product is
Multiply. Enter the product in simplest form.
5/8×32
Multiply. Enter the product in simplest form.
5/8×24
Multiply. Enter the product as an improper fraction in simplest form.
1/5×6
Multiply. Enter the product as an improper fraction and mixed number in simplest form.
1/8×10
Answers
Answer:
1. {1/20} 2. {7/36} 3. {1/2} 4. {8/21} 5. {4/15}
6.{1/6} 7.{ 20} 8. {15} 9. {1.2} 10. {1.25}
Step-by-step explanation:
help asap
..........
Answers
zvzvhbhbj jnj
Which of the following fractions can be represented by a terminating decimal?
A.
B.
C.
D.
Answers
Answer:
C
Step-by-step explanation:
2) Consider the following system of three equations:
(I added an image)
Answers
===============================================
Explanation:
Subtract the second equation from the first one
[tex]\ \ \ \ 3x+3y-5z = 4 \ \ ... \text{ eq 1}\\-(4x-4y+z = -1) \ \ ... \text{ eq 2}\\---------\\\ \ -x+7y-6z = 5[/tex]
Let's call that result equation 4.
Now focus on equation 3 and equation 4
equation 3 is -x+7y-6z = 2
equation 4 is -x+7y-6z = 5
Note how the left hand sides are identical, but the right hand sides are different. This means that we have an inconsistent system with no solutions. No matter what numbers we pick for x,y,z, there is no way to make all three given original equations to be true.
What is the solution to the inequality -2.1x + 2.9 > 15.5?
Answers
Answer:
x<−6
Step-by-step explanation:
Let's solve your inequality step-by-step.
−2.1x+2.9>15.5
Step 1: Subtract 2.9 from both sides.
−2.1x+2.9−2.9>15.5−2.9
−2.1x>12.6
Step 2: Divide both sides by -2.1.
−2.1x−2.1>12.6−2.1
x<−6
2 3/8x3 3/7 please answer
Answers
Answer:
171/56
Step-by-step explanation:
convert the mix number to an improper fraction then calculate your income
Answer:
I think it would be 8 1/7 if im wrong im srry!
Step-by-step explanation: