Answers
Answer:
x = 1, y = -1, z = 3
Step-by-step explanation:
x - 2y + 2z = 9
y + 2z = 5
z = 3
According to the last equation, z is equal to 3 so we can plug that in and our new 2 equations will be:
x - 2y + 6 = 9
y + 6 = 5
We can subtract 6 from both sides of the second equation to end up with:
y = -1
Now plugging this into the first equation, we have:
x + 2 + 6 = 9
x + 8 = 9
Subtract 8 from both sides
x = 1
Related Questions
C. Use the activity series of metals to predict the products of the following single-replacement
reaction. Explain your answer. (1 point)
NiCl2 + Fe →
Answers
Answer: NiCl2 + Fe
Iron is above nickel in the activity series, so iron will replace nickel like this:
NiCl2 + Fe → FeCl2 + Ni
Cu(OH)2 is insoluble, so it will form a precipitate.
Step-by-step explanation:
hope this helps =)
How much ply wood is needed to make 12
cabinets each requires 5 m long?
Answers
Answer:
60 m worth?
Step-by-step explanation:
5×12
−2 1/6 divided by 1 1/4
100 points
Answers
Answer:
-1 11/15Step-by-step explanation:
−2 1/6 divided by 1 1/4:
-2 1/6 ÷ 1 1/4 = - 13/6 ÷ 5/4 = - 13/6 × 4/5 = - 26/15 =-1 11/151) to divide that mixed number we'll need to turn it into an improper fraction:
[tex] - 2\frac{1}{6} = - ( \frac{6 \times 2 + 1}{6} ) = - \frac{13}{6} \\ 1 \frac{1}{4} = \frac{4 \times 1 + 1}{4} = \frac{5}{4} [/tex]
2) now let's divide it, reciprocating 1 1/4 and multiplying both fractions one by another:
[tex] - \frac{13}{6} \times \frac{4}{5} = - \frac{52}{30} = - \frac{26}{15} [/tex]
3) Hence the answer is -26/15
Enter the slope of the line through the points (4, 15) and (4, 12). *
Answers
Answer:
-3/0 is the slope....or just -3.
Step-by-step explanation:
slope method = m= y2 - y1/ x2 - xm = 12 - 15/ 4 - 4 = -3/0 or just -3 simplified.
I'm giving everything. The wrong answer will be reported,].
Answers
what is 3 1/4 as an improper fraction a imprper fraction?
Answers
Answer:
13/4
Step-by-step explanation:
3×4=12
12+1=13
Your welcome
Answer:
13/4
Step-by-step explanation:
Eric wishes to triple the recipe how much of each ingredient should he use
Answers
Answer:
What are the measurements to begin with?
Step-by-step explanation:
how can you tell whether or not a figure is a scaled copy of another figure?
Answers
Answer:
If they are divisible by the numbers in the original shape, then try and see if the others sides of the scaled copy are scaled by the same factor. If they are, then they are a scaled copy.
Step-by-step explanation:
Consider the following patter: -18, X, -10, -6, -2
The value of x in this pattern is
Answers
Answer:
-14
Step-by-step explanation:
(-6)-(-2)= -4
(-10)-(-6)= -4
therefore there is a 4 number Gap between them:
(-10) + (-4) = -14
What is the answer for this plz??? I will mark brainliest!!!
Answers
Answer: 59 1/2
Step-by-step explanation:
Answer:
The new elevation is -92 [tex]\frac{1}{8}[/tex] ft.
Step-by-step explanation:
-75 [tex]\frac{3}{4}[/tex] = -75[tex]\frac{6}{8}[/tex]
-75 [tex]\frac{6}{8}[/tex] + -16 [tex]\frac{3}{8}[/tex] = -91 [tex]\frac{9}{8}[/tex] = 92 [tex]\frac{1}{8}[/tex]
Two workers win prize of £240, they share prize money in ratio of 3.5, how much does one get
Answers
90
Step-by-step explanation:
Total Prize 240
Sharing at 3:5 = 3+5 = 8
240/8 = 30
what is the answer please
Answers
Answer:
X=20
Step-by-step explanation:
I think
What is the interval used in the frequency chart shown below?
Answers
A.4
took the test
╰(*°▽°*)╯(☞ﾟヮﾟ)☞
Answer:
the answer is a i got a hundred on that tes a year ago
Step-by-step explanation:
The following histogram shows the height of basketball players what would be the best estimate of average height ?
A. 75in
B. 82in
C. 85in
D. 80in
Answers
Answer:
D
Step-by-step explanation:
Please help fast!!!! Find the seventh term of the geometric sequence if a1=7 and r=3
Answers
Answer:
15309 Im pretty sure
Step-by-step explanation:
a7=ar^7
=7(3^7)
7 x 2187=15309
Problem ID: PRABJVTY
Answers
Answer:
I'm confused too I'm sorry
which shape has sides that are straight and connected?
Answers
Answer:
The first shape
Step-by-step explanation:
7. Which transformation is not an isometry?
Answers
Explanation:
Choice A is a reflection. Choice C is a rotation. Reflections and rotations are isometries because they preserve the same shape and size of the original figure. Translations are the third type of isometry.
Choice B is not an isometry. It looks like an extra point is added along with extra line segments. The before and after figures are completely different.
What number does E represent
Answers
Answer: 6
Step-by-step explanation: i hope this helps Brainliest please
How many solutions does the equation 3x + 6 = −1 − 3 + 4x have? (5 points)
Two
None
One
Infinitely many
Answers
Answer:
The equation has only one solution which is:
[tex]x = 10[/tex]Step-by-step explanation:
Given the equation
[tex]3x\:+\:6\:=\:-1\:-\:3\:+\:4x[/tex]
Let us solve the equation to determine the type of the equation
[tex]3x\:+\:6\:=\:-1\:-\:3\:+\:4x[/tex]
subtract the number: -1 - 3 = -4
[tex]3x+6=4x-4[/tex]
subtract 6 from both sides
[tex]3x+6-6=4x-4-6[/tex]
[tex]3x=4x-10[/tex]
subtract 4x from both sides
[tex]3x-4x=4x-10-4x[/tex]
[tex]-x=-10[/tex]
Divide both sides y -1
[tex]\frac{-x}{-1}=\frac{-10}{-1}[/tex]
[tex]x=10[/tex]
Therefore, the equation has only one solution which is:
[tex]x = 10[/tex]Answer:
C one
Step-by-step explanation:
I toolk the test
The area of a rectangular field is 6831 m If the length of the field is 99 m, what is its width?
Answers
Answer:
The width is 69m
Step-by-step explanation:
Set it up in a equation, W x 99 = 6831. So first thing to do is get the letter by its self. So you will do the opposite of multiplication. And what you do to one side you do to the other so you divide 6831 by 99. And you get W = 69
Answer:
Step-by-step explanation:
Area of rectangular field = length × width 99×w=6831
w = 6831/99
w=69m
A glass of milk is moved from a refrigerator with a temperature of 6C to a room with a temperature of 25C. One minute later the milk has warmed to a temperature of 9C. Determine the temperature of the milk at time t. After how many minutes does the milk have a temperature that is 80% of the ambient temperature?
Answers
kshsheveosbwjsvsusvsisvsidvsksns
Step-by-step explanation:
BRAINIST PLSS
Can you help me with this question please by the way its not 101
Answers
Answer:
41
Step-by-step explanation:
101+38=139
180-139 = 41
What numbers lie between 42 square root
Answers
Answer:
√ 42 lies between 6 and 7
Step-by-step explanation:
We know that √ 42 will lie between √ 36 and √ 49
And √ 36 = 6 ; √ 49 = 7
Hence we can be sure that √ 42 lies between 6 and 7
Factor the following expression using the GCF.
8dr – 24r
r(8d – 24)
4r(2d – 6)
8(dr – 3r)
8r(d – 3)
Answers
Answer:
the answer to your question is 8r(d-3)
hope this helps :-)
Please Help Me. I am so mad at this freaking problem
Answers
Thanks
God bless you
Find the slope on the graph
Answers
Slope = 3/4
A watermelon seed is 0.4cm long. How far would a line of 126 stretch?
Answers
Answer:
0.504m
Step-by-step explanation:
First, we would multiply 0.4cm by 126 watermelon seeds to find the length of the line in cm.
0.4*126
= 50.4cm
Therefore, the line of watermelon seeds stretches 50.4cm.
Now, because the question wants us to type the answer in meters, we must convert 50.4cm into meters. We do this by dividing 50.4 by 100 since 100cm makes up 1 meter.
50.4/100
= 0.504m
Therefore, the line of watermelon seeds stretches 0.504m.
I hope this helps!
please answer fast:(((
Answers
Answer:
5
Step-by-step explanation:
I would say 5 because it looks like an isosceles triangle and isosceles triangles have two equal legs on a triangle.
If a household appliance has a wattage of 7,043 and is in use for 9 hours, how much CO2 was produced? Round to 1 decimal.
Answers
Answer: = 62.8 pounds of CO₂
Step-by-step explanation:
1 kilowatt per hour produces 0.99 pounds of C02.
The total wattage in hours used was;
= 7,043 * 9 hours
= 63,387 watts
In kilowatts;
= 63,387/1000
= 63.387 kilowatts
CO2 produced;
= 63.387 * 0.99
= 62.75313
= 62.8 pounds of CO2