Answer: one CD cost $12 and one DVD cost $15 .
Step-by-step explanation:
In this situation we will represent the cost o one CD by x and the number of one DVD by y. Four CDs plus five DVDs cost 123 so we will represent it by the equation 4x + 5y = 123
The same or the second part of the statement. 2 CDs plus 4 DVDs cost $84 so we will also represent that by the equation , 2x + 4y = 84
Since we have two equations we will use it to solve or x and y using the elimination method.
4x + 5y = 123
2x + 4y = 84 Multiply the down equation by -2 to eliminate the x variable.
-2(2x + 4y ) = -2(84)
-4x -8y = -168
We will now have the new equations ,
4x + 5y = 123
-4x - 8y = -168 Add both equations to
-3y = -45
y= 15
This means each DVD cost $15 .
Now we will now have to solve for x by plotting in the value of y into the equation .
4x + 5(15) = 123
4x + 75 = 123
-75 -75
4x = 48
x = 12
This also means that one CD cost $12.
Asap, please answer correctly will mark brainliest if correct
Answer:
no solutions
Step-by-step explanation:
-3(x-20)=5-3x
-3x+60=5-3x add 3x to both sides
60=5 not true
no solutions
Answer:
no solution
Step-by-step explanation:
Let's solve your equation step-by-step.
−3(x−20)=5−3x
Step 1: Simplify both sides of the equation.
−3(x−20)=5−3x
(−3)(x)+(−3)(−20)=5+−3x(Distribute)
−3x+60=5+−3x
−3x+60=−3x+5
Step 2: Add 3x to both sides.
−3x+60+3x=−3x+5+3x
60=5
Step 3: Subtract 60 from both sides.
60−60=5−60
0=−55
Consider only the discriminant, b2-4ac, to determine whether one real-number solution, two different real-number solutions, or two
different imaginary-number solutions exist.
4x² - 12x+9=0
A.One real solution
B.Two different imaginary-number solutions
C.Two different real-number solutions
Answer:
A. One real solution
Step-by-step explanation:
The discriminant is used to find the number of real solutions to a quadratic equation.
If the discriminant is greater than 0, there are two real solutions.
If the discriminant is equal to 0, there is one real solution.
If the discriminant is less than 0, there are no real solutions.
All quadratic equations have the format:
ax^2+bx+c
Therefore our values for a, b and c are the following:
a = 4
b = -12
c = 9
Therefore the discriminant is:
(-12)^2-4(4)(9)
144-144 = 0
The discriminant is equal to 0, so there is one real solution (Option A).
Hope this helped!
Use the equation y=3.2x + 5 to fill in the table.
Answer:
Step-by-step explanation:
Answer:yes
Step-by-step explanation:
I need to make these into algebraic expressions or equations:5 less than the product of 10 and c, 14 more than 6 times t, the sum of x and y is 18, A number minus 12 is 17
Answer: more than y :
y + 6
3 times a number:
x ← a number
3x
5 less than the product of 10 and c :
10c ← the product of 10 and c
10c - 5
14 more than 6 times t :
6t ← six times t
6t + 14
The sum of x and y is 18:
x+y ← the sum of x and y
x + y = 18
A number minus 12 is y:
x - a number
x - 12 = y
Answer:
See below
Step-by-step explanation:
Here is translation for you
5 less than the product of 10 and c
-5 + 10*c = 10c - 514 more than 6 times t
+14 + 6*t = 6t + 14The sum of x and y is 18
x + y = 18A number minus 12 is 17
n - 12 = 17Josie runs 3 miles and burns 252 calories. How many calories does she burn in 1 mile?J HELPP PLZ
Answer: 84
Step-by-step explanation: 252 divided by 3 = 84
In this polygon, which angle is an interior angle?
A°
C°
B°
D°
Answer:
B° is the interior angle
Step-by-step explanation:
An interior angle is an angle that is formed when two sides of a polygon share an endpoint. Therefore, B° is the interior angle because it is formed when the two sides of the polygon shown share the same endpoint.
Answer:
The correct answer would be B°
Step-by-step explanation:
"Interior" means "inside". Angle B° is the only one on the inside of the shape.
The ratio of trucks to cars on a freeway is 5 to 8 if there are 440 carson the freeway how many trucks are there?
Express your answer in scientific notation.
Answer:
14.4 × 10^13
Step-by-step explanation:
.........
A pole that is 3.3m tall casts a shadow that is 1.53m long. At the same time, a nearby tower casts a shadow that is 47.75m long. How tall is the tower? Round your answer to the nearest meter.
Answer:
103 mStep-by-step explanation:
A pole, its shadow and a tower with its shadow form similar right triangles
Let the tower be x m tall
Then as per similarity we have the ratio of corresponding sides:
47.75/1.53 = x/3.3x = 3.3*47.75/1.53x = 103 m rounded to nearest meterWhat is 10,000 + 4,000 + 500 + 8 in standard form?
Answer:
14,508
I hope this helps!
(-3x2 + 5x - 2) - 2(x2 - 2x - 1)
If the expression above is rewritten in the form
ar2+bx+c, where a, b, and c are constants, what is
the value of b ?
Answer:
(-3x²+5x-2)-2(x²-2x-1)=
-3x²+5x-2-2x²+4x+2=
-5x²+9x, so b, the coefficient of the x term, is 9.
(a=-5 and c=0)
answered Sep 9, 2019 by Rod Top Rated User (795k points)
Step-by-step explanation:
Value of b will be 9
What is quadratic equation?In algebra , a quadratic equation is any equation that can be rearranged in standard form as ax^2 + b x + c =0 where x represent unknown and a, b and c are constants .
using algebraic functions , solving given equation
-3x^2 + 5x -2 -2x^2 + 4x + 2
-5x^2 + 9x +0 equation 1
now , comparing simplified equation 1 with general quadratic equation (ax^2 +b x +c ), we get
a=-5
b=9
c=0
so, value of b = 9
Lets learn more about quadratic equations
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A convertible is traveling at 45 miles per hour, and its wheels have a diameter of 48 inches. How many complete revolutions do the wheels make in one minute? rev/min
Answer: The wheel make 315 complete revolutions in one minute
Step-by-step explanation: Given speed of convertible =45 miles/hr
To answer this question you will need to know how many inches the car travels Per minute.
1. To find this out you will first divide 45 miles by 60 to get the number of miles per minute.
The convertible travels 0.75 mi./min.
2. Next you will convert this number of miles to inches.
There are 63,360 inches per mile.
0.75 x 63360 = 47520 inches per minute.
3. You then need to find the distance the wheel travels in one rotation. You will need to find the circumference of the wheel.
C = pi x d
3.14 x 48
C = 150.72 inches
Each rotation is about 150.72 inches.
4. Finally, divide the total distance traveled in a minute by the circumference(distance of one rotation) to get the total number of rotations in a minute.
47520/150.72 is about 315.3 rotations per minute.
Answer: it’s 315.3
Step-by-step explanation: A convertible is traveling at 45 miles per hour, and its wheels have a diameter of 48 inches. How many complete revolutions do the wheels make in one minute?
rev/min
Given that 7 is a zero of h(x)=x^3-7x^2-3x+21, find the other zeros.
Answer:
x= 7 x = ±√3
Step-by-step explanation:
h(x)=x^3-7x^2-3x+21
Factor by grouping
h(x) = x^2( x-7) -3 (x-7)
Factor out an (x-7)
h(x) = (x-7) ( x^2 -3)
Using the zero product property
0= (x-7) ( x^2 -3)
x-7 =0 x^2 -3 =0
x=7 x^2 =3
x= 7 x = ±√3
90 is 12% of what number
Answer:
750
Step-by-step explanation:
Just divide 90 by 0.12 then it gives you 750. If you want to check it you can multiply 750 by 0.12 and it gives you 90. I got 0.12 from 12% since they're the same thing.
Someone please help..
Answer:
ITS J because the Mlimeters are suppose to be on the other side
Step-by-step explanation:
This is for IXL
The floor of a round hut has a radius of 2 yards. What is the floor's area?
Use 3.14 for .
Answer:
Step-by-step explanation:
Hey, hope you're having a great day. :)
The floor of the round hut suggests that this is a cylinder, so.
Lets assess the formula.
A = 3.14 x r^2
A = 3.14 x 2^2
A = 3.14 x 4
A = 12.56.
Hope this helps!
solve the proportion 20/3 equals something over six piece of correct option 10 23 40 20
Answer:
[4 over x equals 5 over 10]
Solve for x, so you need to isolate/get x by itself in the equation.
Multiply x on both sides
Multiply the inverse of 5/10, which is 10/5, to get rid of the fraction and get x by itself
8 = x
Step-by-step explanation:
Solve the absolute value equation.
(2x – 1) = 15
Answer:
Hello there!^^
Step-by-step explanation:
⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒
Remove the parentheses Add 1 to both sidesSimplify Divide both sides by 2Finally, you simplify again~~~~~~~~~~~~~~~~~~~~~~~~~~~
→ 1. 2x-1=15
→ 2. 2x=15+1
→ 3. 2x=16
→ 4. x = 16/2
→ 5. x = 8
Answer: x = 8
Hence, x would equal to 8 (eight)
Your fellow brainly user: xCherryxUwU
#Thanks!
⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒⭒
ASAP!!! GOD BLESS u
Answer:6 and 2
Step-by-step explanation:
Answer:
The answer is 6 by 2
Step-by-step explanation:
The perimiter is the total of the sides. So, you have to find out the values of the sides of the rectangle using the number 16. Its a rectangle, and the are is 12. So, you can find that it is 6 & 2.
B=9+ 1/3qa
solve for a
Step by step please!
Answer:
[tex]a=\frac{3(B-9)}{q}[/tex]
Step-by-step explanation:
Step 1: Write equation
[tex]B=9+\frac{1}{3} qa[/tex]
Step 2: Solve for a
Subtract 9 on both sides: [tex]B-9=\frac{1}{3} qa[/tex]Multiply 3 on both sides: [tex]3(B-9)=qa[/tex]Divide both sides by q: [tex]\frac{3(B-9)}{q} =a[/tex]Rewrite: [tex]a=\frac{3(B-9)}{q}[/tex]stream back door by stray kids
Answer:
Okay
Step-by-step explanation:
Answer:
Okay Stay. I will stream it. Nice to meet you. I am Nancy.
When Arianna left her house,her cell phone was 45% charged started losing charge at a constant rate. 4 hours after leaving her house, the battery had 15% remaining battery life. Write an equation for B in terms of t representing the charge remaining in Arianna battery as a percentage t hours after Arianna left her house
Answer:
B = 3.75t
Step-by-step explanation:
Given;
initial charge of Arianna's phone = 45%
the charge remaining in Arianna battery = 15%
If after 4hours of leaving her house, the battery had 15% remaining battery life, then the battery is discharging at the rate of ( 15% / 4hours) 3.75% per hour.
Thus, the charge remaining in Arianna's battery after she left her house is given by;
B = 3.75t
where;
t is time in hours
B is the percentage of charge remaining
2. MONEY Lars and Peter both have the
same amount of money in their wallets.
They went to the store together and
decided to buy some cookies, splitting
the cost equally. After buying the
cookies, do they still have the same
amount of money in their wallets? What
property is relevant to help you decide?
After buying the cookies, they both lost money but still share the same balance because in the question it says they went to the store together and decided to buy some cookies, splitting they cost equally, Key word Equally. since they spent the same amount as one another they still share the same balance.
-6x-2y=9 what is the slope
Answer:
[tex]\huge\boxed{m=-3}[/tex]
Step-by-step explanation:
The standard form:
[tex]Ax+By=C[/tex]
The slope-intercept form:
[tex]y=mx+b[/tex]
[tex]m[/tex] - slope
METHOD 1:[tex]m=-\dfrac{A}{B}\\\\-6x-2y=9\to A=-6;\ B=-2\\\\m=-\dfrac{-6}{-2}=-3[/tex]
METHOD 2:[tex]-6x-2y=9[/tex]
convert to the slope intercept form:
[tex]-6x-2y=9\qquad|\txt{add}\ 6x\ \text{to the both sides}\\\\-2y=6x+9\qquad|\text{divide both sides by (-2)}\\\\y=-3x-4.5\to m=-3[/tex]
*
Find the area of the following square:
15 ft.
Answer:
225
Step-by-step explanation:
The formula is a^2.
Where a is the side
So, 15^2
= 15x15
=225
Solve for B.
Ax+By=C
What is B equal to?
Answer:
B=C/y−Ax/y
Step-by-step explanation:
(1 x 1,000,000) + (7 x 1,000) + (2x1,000) + (9 x 100)
Answer: 1,009,900
Step-by-step explanation:
Answer:
that equals to= 9901.1
Step-by-step explanation:
i added and multiplyed all of that
Write the equation y+4+-1 (x-3) in standard form.
Answer:
−x+y+7
Step-by-step explanation:
these 2 questions math 9th thanks! will give brainly!!
Answer:
1) 25+7(n-1)
When the above 'n'(hours) is substituted on the equation, it equals up to the right cost.
2) Given that n represents the no.of bikes, you just plug it in to the equation below.
250+39(n-1)
= 250+39(20-1)
= 250+39*19
= 250+741
= 991
I’m confused on what the answer is. Can anyone help me and explained it?
Answer: B. 4/5 cups.
Step-by-step explanation:
Ratio number of--> chocolate chips : dozens of cookies made
--> 4 : 5
The question ask for 1 dozen of cookies. In the ratio above, it states for 5 dozens of cookies.
Our new ratio would be:
Chocolate chips: dozens of cookies made
x : 1
we turn the 5 in the right side of ratio by dividing by 5 so we must do the same for other side of ratio by dividing 5 with 4.
x=4/5
hence answer is B. 4/5 cups
...to be honest the question si worded the best but i assume this is what it means.