Answer:
x = 3
x - 2y = -25
Step-by-step explanation:
Since y = 4x + 2 put (4x + 2) into the first equation in place of y:
6x - (4x + 2) = 4
To get rid of the parenthesis change 4x to -4x and 2 to -2:
6x - 4x - 2 = 4
If you combine the x’s you will now have only 2x
2x - 2 = 4
To get x by itself we add 2 to both sides
2x = 6
Divide by 2 on both sides:
x = 3
_______________________________
For the last equation (x - 2y) we put (4x + 2) in place of y again:
x - 2[4x + 2]
We know the value of x already:
3 - 2[4(3) + 2]
Now solve for the things in parenthesis:
3 - 2(14)
3 - 28
Subtract to get the answer:
-25
Answer:
[tex]Point Form:(1,2)\\Equation Form:x=1,y=2[/tex]
Step-by-step explanation:
Let's solve your system by substitution.
[tex]6x-y=4;y=4x+2x-2y[/tex]
Step: Solve 6x−y=4for y:
[tex]6x-y=46x-y+-6x=4+-6x[/tex]
[tex]-y=-6x+4[/tex]
[tex]\frac{-y}{-1} =\frac{-6x+4}{-1}[/tex]
[tex]y=6x-4[/tex]
Step: Substitute 6x−4 for y in y=6x−2y:
[tex]y=6x-2y\\6x-4=6x-2(6x-4)[/tex]
[tex]6x-4=-6x+8[/tex]
[tex]6x-4+6x=-6x+8+6x\\12x-4=8\\12x-4+4=8+4[/tex]
[tex]12x=12\\\frac{12x}{12} =\frac{12}{12}[/tex]
Step: Substitute 1 for x in y=6x−4:
[tex]y=6-4\\y=(6)(1)-4\\y=2[/tex]
Answer:
[tex]x=1 , y=2[/tex]
Hope this helps :)
-ilovejiminssi♡
i need help with this question
Answer:
1) 9/20
2) 5/11
Step-by-step explanation:
For the first question: We read the number "0.45" as "45 hundredths," and we write it as the fraction 45/100. Of course, since 45 and 100 share the common factor 5, we can reduce this fraction by dividing the numerator and denominator by 5 to get the reduced form 9/20.
For our second problem, we need to perform a bit of "mathematical surgery" to find the appropriate fraction for x = 0.454545... First, the dots tell us that this fraction is repeating - those 45s will keep going on and on forever. When we multiply x by 100, then, we move the decimal two places to the right, but the repeating part still remains, giving us
[tex]100x=45.454545\dots[/tex]
From here, we can "surgically remove" the repeating bit using our original value of x:
[tex]100x-x=45.454545\dots-0.454545\dots\\99x=45[/tex]
And from here, we just have to divide both sides of the equation by 99 to solve for x:
[tex]99x=45\\x=45/99\\x=5/11[/tex]
Answer: 4/9
Step-by-step explanation:
Can someone pls help me with this? Tysm guys! Aslo it's not C! :)
Answer:
H
Step-by-step explanation:
Plug in values of x to see which get the same values of y
1st question
A factory makes 12 bikes in 3 hours. If it keeps making bikes at the same rate, how many bikes will it have made in 8 hours? (HINT: Set up a proportion)
16 bikes
24 bikes
32 bikes
2nd question
A recipe calls for 3 sticks of butter for one batch of 20 cookies. How many sticks of butter would you need to cook 100 cookies? (HINT: Set up a proportion)
9 sticks of butter
15 sticks of butter
100 sticks of butter
Answer:
1st question: 32 bikes
2nd question: im not sure maybe 15
Step-by-step explanation:
Uhm read the highlighted. I already answered the first one (as you can tell its C) I just need help with the last one :D
Answer:
He added all the numbers as they were a decimal number, with the kilometers traveled by Bus and Car being 2 to the left than where it should have been.
How I found it:
Converting 7 and 2.3 into a decimal with the decimal place two to the left.
7 becomes 0.07
2.3 becomes 0.23
I added this to the kilometers traveled by train(which is 19.955km).
19.955km + 0.023 + 0.07 = 19.985
19.985 being the value for answer A.
Hope that helps :)
Point A(7, 3) is translated to A prime (16, negative 9). Which rule describes the translation?
Elsa took out a 2-year loan to buy a car at a 6% simple interest rate.
A. If she has to pay a total of $264 in interest, how much principal did she borrow to pay for the car?
B. How much did she end up paying for her car altogether?
Step-by-step explanation:
P = I / rt is the formula we're going to use.
P is the principle (which is what we're solving for)
I = the interest accrued over the specified amount of time (2 years)
r = the interest rate (6%)
t = the time specified (2 years)
Change the percent to a decimal. Place the decimal two places to the left to make 0.06.
P = 264 / 0.06(2)
P = 264 ÷ 0.12 = 2,200
Principal borrowed would be $2,200
Complete each statement.
To multiply a number by 1,000, move the decimal point ______ places to the _________.
To multiply a number by 0.01, move the decimal point __________places to the ___________.
Answer:
Complete each statement.
To multiply a number by 1,000, move the decimal point three places to the right.
To multiply a number by 0.01, move the decimal point 2 places to the left.
Step-by-step explanation:
plzzs help me with thisssssssss
Answer:
x=51
Step-by-step explanation:
x+x-12=2x-12
90=2x-12
102=2x
x=51
plz help it's dues 15 min for 11pts
Answer: click I don’t know this yet. It’s only diagnostics, so if you click ”I don’t know this yet” it will help you learn.
Step-by-step explanation:
I need help with this I will try to give as much coins thank u
Answer:
4x and 3
Step-by-step explanation:
because the first term contains a variable and the second term does not
Each statement describes a transformation of the graph of y = x. Which statement correctly describes the graph of y = x + 10?
A. It is the graph of y = x translated 10 units to the right.
B. It is the graph of y = x where the slope is increased by 10.
C. It is the graph of y = x translated 10 units up.
D. It is the graph of y = x translated 10 units down.
Answer:
C
Step-by-step explanation:
since it is the slope form y = mx+b
b = y axis
so in order to go up you have to translate upwards
hope this helped ;)
Ned receives 27 cents in change after purchasing a video game with a twenty dollar bill. Write an equation to find the cost of the video game x
need help, please
will give brainly
Answer:
(6,9)
Step-by-step explanation:
3(2,3)
= (6,9)
Hope this helps plz hit the crown :D
Please answer! Give explanation to and follow steps to question. Tysm!!
Answer:
It would cost about $2.38
The point (2, -7) is reflected across the x-axis.
What are the coordinates of the image of the point?
Answer: need more information
Step-by-step explanation: ....
The image of the point (2, -7) after reflection across the x-axis is (2, 7).
What is Reflection?In mathematics, reflection is a transformation that flips a figure over a line or plane. The line or plane is called the axis of reflection, and each point of the figure and its image are equidistant from the axis of reflection.
We have the coordinates as (2, -7).
Now, the rule for reflection across x- axis is
(x, y) -> (x, -y)
When a point is reflected across the x-axis, its y-coordinate is negated.
Therefore, the image of the point (2, -7) after reflection across the x-axis is (2, 7).
Learn more about Reflection here:
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Please help me!! I really need a grade boost!!
Answer:
A) C
B) D
C) y=3x+5
Step-by-step explanation:
I think :)
NEED HELP WITH MATH ASAP IF YOU DONT KNOW THE ANSWER THEN DONT ANSWER
Answer:
Line B, I believe.
Hey is anyone available to answer rn? I need it quick =v=
Jim surveyed the students in his school about the number of hours they watch T.V. each night. In his analysis, he stated that the range was 6 and the mean was 2. What conclusion can you draw?
A. While the typical student watches 6 hours of TV a night, the difference between the highest number of hours and lowest was 2 hours.
B. While the typical student watches 2 hours of TV, half watch less than 6 hours.
C. On average, students watched 2 hours of TV, and there was a 6-hour variation in viewing times.
D. Most students watch 2 hours of T.V. or less.
Answer:
C.
Step-by-step explanation:
Look at the possibilities
Plss I need help with 25 and 26 before midnight plsss!!
Plz help! This is all you need and I will give brainliest.
Answer:
60 miles per hour
Step-by-step explanation:
Unit Rate: A calculation regarding mph.
420 miles in 7 hours = 7/420
Flip the equation!
420/7
420/7 = 60
60 miles per hour
HELP ASAP I"M JUST TRYING TO GET GOOD GRADES NO LIES EITHER!!
Answer:
C and D
Step-by-step explanation:
If you subtract 2.5 from 16.2 you would get 13.7 same for 19.25.It would then equal 16.75
Therefore C and D are correct :)
Can u please help me
Answer:
-3268
Step-by-step explanation:
just plug in the answer.
please help i need help fast ASAP and please don't answer for the points
Answer:
area of a circle
= pi r square root
=3,14 x 5 x 5
=3,14 x 25
=78.5cm
2n question
= pi r square root
=3,14 x 7 x 7
=3,14 x 49
=153,86ft2
3rd question
C= pi d
C=3,14 x 10
C=31,4cm
4th question
C=pi d
C= 3,14 x 14
C=21,98ft
Step-by-step explanation:
Hope this helps!
please help me on this
Answer: m=2.8
Step-by-step explanation:
You can reverse the equation and instead solve...
4-1.2 which equals 2.8.
m=2.4Answer:
m = 2.8
Step-by-step explanation:
m+1.2=4
move all terms containing m to the left and all other terms to the right.
+1m=+4-1.2
simplify left and right side of the equation.
+1m=+2.8
divide both sides of the equation by 1 to get m.
m=2.8
Giving brainliest for this one !!
( whoever answers the fastest and has a correct answer )
A room in your house is 2 3/5 inches long on a scale drawing. If the map has a scale of 1 inch = 5 feet, how long is the actual room?
Answer:
10 7.2 inches long
Step-by-step explanation:
:)
Answer:
10 7.2 inches
Step-by-step explanation:
:( jk jk :)
Eddie watches a drawbridge rise at a constant rate. It takes 112 minutes for the drawbridge to rise to 13 of its total height. Eddie predicts that it will take a total of 416 minutes for the drawbridge to reach its full height. Is he correct?
Answer:
sure it isssssssssssssss
Eleven Fahrenheit temperatures are shown on a map during a weather report. When the temperatures are ordered from least to greatest, the middle temperature is below 0F. Do you know exactly how many of the temperatures are represented by negative numbers? Explain.
Answer:
Yes, in order for zero to be the median, there must be 5 negatives, and 5 positives.
Step-by-step explanation:
Find all solutions to the equation $x^2 - 7x = 30$. If you find more than one, then list the values separated by commas. If the solutions are not real, then they should be written in $a + bi$ form.
Answer:-3, 10
Step-by-step explanation:
Subtracting 30 from both sides gives x^2 - 7x - 30 = 0. The quadratic factors as
(x - 10)(x + 3) = 0, so the solutions are x = 10 and x = -3.
Instead of factoring, we also could have applied the quadratic formula with a = 1, b = -7, and c = -30:
The solutions to the equation x² - 7x = 30 are -3 and 10.
What is a solution?Solutions are the values of an equation where the values are substituted in the variables of the equation and make the equality in the equation true.
We have,
x² - 7x = 30
x² - 7x - 30 = 0
Middle-term factorization.
x² - (10 - 3)x - 30 = 0
x² - 10x + 3x - 30 = 0
x(x - 10) + 3(x - 10) = 0
(x + 3) (x - 10) = 0
x + 3 = 0
x = -3
x - 10 = 0
x = 10
Thus,
The solutions are -3 and 10.
Learn more about solutions of equations here:
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