Answers
Answer:
a
Step-by-step explanation:
Related Questions
Given a system of two equations in Two variable, replacing one equation by the sum of that equation and multiple of the other produces a system with the same solution. Show why this is true by solving the system of equations given. Justify the reason for each step. Use addition property of equality and multiplication property of equally in your answers.
1. To solve the system using elimination, First multiply the bottom equation by two. Write the new system of equations.
5x+2y=7
2. Why is this multiplication allowed?
3. What variable will be eliminated when the equations are combined after the multiplication?
4. Next, add the equations tighter. Your answer should be a single equation with one variable.
5. Why can you add the equations
6. Solve the equations for x
7. Substitute x back into one of the equations solve for y
8. What is the solution to the system of the equations?
Please I need this in 24 hours
Answers
Answer:
5x + 2y = 7
3x � y = 2
multiply the second equation by 2 and leave the first equation as is to get:
5x + 2y = 7
6x � 2y = 4
add the second equation to the first equation to get:
11x = 11
divide both sides of that equation by 11 to get:
x = 1
replace x with 11 in the first original equation to get:
5x + 2y = 7 becomes 5 + 2y = 7
solve for y to get y = 1
your solution is x = 1 and y = 1
confirm by replacing x and y with 1 and 1 in both original equations to get:
5x + 2y = 7 becomes 5 + 2 = 7 which is true.
3x � y = 2 becomes 3 - 1 = 2 which is true.
Step-by-step explanation:
Given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solution. Show why this is true by solving the system of equations given. Justify the reason for each step. HINT: Use addition property of equality and multiplication property of equality in your answers.
5x + 2y = 7
3x � y = 2
A1. To solve the system using elimination, first multiply the bottom equation by 2. Write the new system of equations.
B1. Why is this multiplication allowed?
C1. What variable will be eliminated when the equations are combined after the multiplication?
D1. Next, add the equations together. Your answer should be a single equation with one variable.
E1. Why can you add the equations?
F1. Solve the equation for x.
G1. Substitute x back into one of the equations to solve for y.
H1. What is the solution to the system of equations?
I hope this helps! ο(=•ω＜=)ρ⌒☆865.3 divided by 5 ...?
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-8(-5b+7)+5b what the answers
Answers
Answer:
45b-56
Step-by-step explanation:
here and solve my recent question is for 100 points istg
Pls help
Simplify the logarithmic expression
Answers
9514 1404 393
Answer:
log₁₂(4)
Step-by-step explanation:
The applicable rule of logarithms (to the same base) is ...
log(a^b) = b·log(a)
__
Then the expression simplifies as follows:
[tex]3\log_{12}(2)+\dfrac{1}{3}\log_{12}(2^3)-\log_{12}(2^2)\\\\=3\log_{12}(2)+\dfrac{3}{3}\log_{12}(2)-2\log_{12}(2)=(3+1-2)\log_{12}(2)\\\\=2\log_{12}(2)=\log_{12}(2^2)=\boxed{\log_{12}(4)}[/tex]
is 8 greater than -8
Answers
Answer:
yes
Step-by-step explanation: bc 8 is positive and -8 in negitive. 8 has a greater vealu bc its posivtive. -8 i has a leere vealu bc it negitive.
Continue each pattern with the next two numbers
-7, -9, -11,-13
Write the explicit equation for this sequence an
What would the 18th term be in this sequence?
Answers
Plz help quick How do you do this problem
Answers
Answer: [tex]\frac{pr}{675}[/tex]
Step-by-step explanation:
cant have a negative exponent[tex]\frac{1}{(3p^{-1} r)^3(5pr^{-2} )^2} \\[/tex] split up (3p^-1 r)^3rewrite that part of the equation[tex]\frac{1}{(\frac{3}{p} )^{3} r^{3} }[/tex] raise 3 to the power of 3 = 27p to the power of 3 = [tex]p^{3}[/tex] Next part of the equation [tex](5p)^{2}[/tex] expand that[tex]5^{2} p^{2}[/tex] simplfy[tex]25p^{2}[/tex] Next part of the equation [tex](r^{-2})^{2}[/tex] multiply the exponents[tex]r^{-4}[/tex] rewrite the equation [tex]\frac{1}{\frac{27}{p^{3} }r^{3} (25p^{2})\frac{1}{r^{4} } }[/tex] combine [tex]\frac{27}{p^{3} } , and , r^{3}[/tex] = [tex]\frac{27r^{3} }{p^{3} }[/tex]combine 25 and [tex]\frac{27r^{3} }{p^{3} }[/tex] Multiply [tex]\frac{675r^{3} }{p^{3} }[/tex] combine [tex]\frac{675r^{3} }{p^{3} }[/tex] and [tex]p^{2}[/tex] [tex]\frac{675r^{3}p^{2} }{p^{3} }[/tex] multiply [tex]\frac{675r^{3}p^{2} }{p^{3} }[/tex] and [tex]\frac{1}{r^{4} }[/tex] [tex]\frac{1}{\frac{675r^{3}p^{2} }{p^{3}r^{4} }}[/tex] cancel the common factors and factor everything out [tex]r^{3}[/tex] comes out of [tex]{675r^{3}p^{2} }[/tex] [tex]r^{3}[/tex] can also come out of [tex]p^{3} r^{4}[/tex] Rewrite as [tex]\frac{1}{\frac{675p^{2} }{p^{3} r} }[/tex] cancel the common factor of [tex]p^{2}[/tex] and [tex]p^{3}[/tex] factor [tex]p^{2}[/tex] out of [tex]675p^{2}[/tex] by mulitiplying factor [tex]p^{2}[/tex] out of [tex]{p^{3} r} }[/tex] cancel the common factorrewrite the expression [tex]\frac{1}{\frac{675}{pr} }[/tex] and then multiply the numerator and denominator and you get the answerWhich of the following has the least value?
A. 13/15
B. 7/8
C. 2/3
D. 3/4
(I also need the work if not its ok!)
Answers
Answer:
its c
Step-by-step explanation:
Answer:
C. 2/3
Step-by-step explanation:
To solve this, we should come up with a common denominator first.
The least common denominator (LCD) of the four fractions would be 120.
So, first multiply each fraction's denominator to get 120, and multiply the numerator by the same amount.
ex. 3/4
4 x 30 = 120
3 x 30 = 90
We get 90/120.
After doing this with each fraction, we get;
13/15 = 104/120
7/8 = 105/120
2/3 = 80/120
3/4 = 90/120
Now, it is easier to see which fraction has the least value (or the one that is the smallest. Your answer is 2/3, since 80/120 is the smallest out of the four.
graph the function r(x) = -1/4 |x|
Answers
10 Points + Brainliest to first correct answer. Please give explanation for Brainliest. Any fake answers will be reported and deleted.
Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?
Answers
the second one is correct
A=18 B=3 bc +4 Substitute the value with a number evaluate each algebraic expression using the given values. What is the number?
Answers
Answer:
YNW MELLY
Step-by-step explanation:YNW MELLY
Equivalate a +4 when a=7
Answers
Answer:
11
Step-by-step explanation:
Plug in the variable into the equation. 7+4=11
Answer:
11
Step-by-step explanation:
a is 7 so 7 + 4 = 11
this should be the answer if not i dont know. sorry
What is the slope of a line perpendicular to the line whose equation is 2x+10y=20. Fully reduce your answer.
Answers
Answer:
m=5
Step-by-step explanation:
2x+10y=20
10y=-2x+20
y=-1/5x+2
slope of this line=-1/5
(replace the denominator by the nominator and the nominator by the denominator and change the sign to the opposite one negative to positive)
slope of perpendicular line=5
Which 3 cards on the bottom are the reasons?
Answers
Answer:
Attachment
Step-by-step explanation:
Melina wants to achieve a race of 22 miles an hour. She completes 10 miles in 30 mins. Did Melina achieve her goal ?
Answers
If you were serving pumpkin pie at your Thanksgiving dinner, how much pie would 8 guests receive? What about 4 guests? 2 guests?
Answers
Answer:
Step-by-step explanation:
if you serve all the pie to 8 guests.. then they would each get 1/8.. if you were able to cut it exactly the same.. but.. we all know that there is always one piece that is bigger and we all want that piece :P b/c pumpkin pie is good
1/8
1/4
1/2
respectively for each of the questions
Can someone tell me the slope ?
Answers
Answer:
slope = 4
Step-by-step explanation:
We can find the slope of a line when knowing 2 points by using the slope formula, [tex]\frac{y_2 - y_1}{x_2 - x_1}[/tex]. [tex]x_1[/tex] and [tex]y_1[/tex] represent the x and y values of the first point, respectively. [tex]x_2[/tex] and [tex]y_2[/tex] represent the x and y values of the second point, respectively.
The two points we have are (2,8) and (0,0). So, in this case, [tex]x_1[/tex] = 2, [tex]y_1[/tex] = 8, [tex]x_2[/tex] = 0, and [tex]y_2[/tex] = 0. Let's substitute those values into the formula and solve to get the slope:
[tex]m =[/tex] [tex]\frac{0-8}{0-2}[/tex]
[tex]\frac{-8}{-2}[/tex]
[tex]4[/tex]
So, the slope is 4.
Mai says that the equation 2x+2=x+1 has no solutions because the left side is double the right side. Do you agree with mai provide evidence for your reasoning.
Answers
Step-by-step explanation:
2x+2=x+1 - subtract 2 from both sides
2x=x-1 - subtract x from both sides
x= -1 - solution
The table shows total number of cars rented everyday for a
week from Golden State Rentals, What is the estimated
average increase in car rentals per day for Tuesday through
Friday?
Golden State Car Rentals
M Tu
W
Th
F
Sa
Su
Day
Total cars
41
109 158 199 262 313 352
Answers
Answer:
182
Step-by-step explanation:
starting from TU witch is 109 you keep adding so you get the eqation
109+158+199+262=728
then it's 728 divied by (/) 4 becase that is how many you added and you get 182 cars
Pls help me with this problem
Answers
Answer:
when adding 3
6+3=9
when subtracting 2
9-2=7
7,8,9,10,11,12,13,
A meal cost $18.50 at a restaurant, including the 9% tax and the 20% tip.
What was the original cost of the meal?
Answers
Need this very badly
Answers
(8x5)x2= 80 square ft
8x7= 56 square ft
50+80+56=186 square ft
D) 186 square ft
What is the value of x? B 75° Enter your answer in the box. X=
Answers
Answer:
55
Step-by-step explanation:
75+50=125
180-125=55
78 is65% of why number
Answers
Answer: 120
Step-by-step explanation:
Expand.
Your answer should be a polynomial in standard form.
(9+ m)(-m +9)=
Answers
Answer: -1m²+81
Step-by-step explanation:
correct standard form means that the terms are ordered from biggest exponent to lowest exponent.The leading coefficient is the coefficient
of the first term in a polynomial in standard form.
FoR example, (9+ m) (-m+9) = *(m+9) (-m+9) *m(-m+9) +9 (-m+9)* -1.mm+9m +9(-m+9) * -1m² +9m +9(-m+9) *-1m²+9m- 9m +81
answer -1m²+81
please help with this
Answers
Answer:
obtuse angles
A plumber charges $65 to make a house call plus an additional charge of $42 per hour for labor. Write an equation to represent the total cost (y) for any number of hours (x).
Answers
A plumber charges $65 to make a house call plus an additional charge of $42 per hour for labor. Write an equation to represent the total cost (y) for any number of hours (x).
Answer:
the required equation to represent the total cost with respect to every hour will be
=》y = 42x + 65
Step-by-step explanation:
total cost (y) = charge to make a house call + additional charge for every our
so, total additional charge for x hours
= 42 × x = 42x
hence y = 65 + 42x ( where 65 is charge to make a house call , y is total cost and 42x is additional charge for x hours )
i hope u got it
have a great day ^_^
3
Regina writes the expression y +9.
4
Which expression is equivalent to the one Regina
writes?
A (9.3 : 4) + y
B 9+ y(3:4)
C (y +9)(3-4)
D None of these
Answers
Answer:
a
Step-by-step explanation:
if you do it right it is a
the answer would be (9•3 divided by 4)+y which is A
Help please!!!!!!!!!!!
Answers
Answer:
f, it isnt doing anything as going up in units of water
Step-by-step explanation:
Please help me I am stuck
Answers
Answer:
Brand C
Step-by-step explanation: