A used bookstore sells hardback books and paperback books.A hardback book costs $11, including tax.A paperback book costs $5, including tax.Jamal bought 3 more paperback books than hardback books.Jamal spent $47. How many paperback books did Jamal buy? A.2 B.3 C.4 D.5
Answer:
D.5
Step-by-step explanation:
You can write the following equations from the information given:
y=x+3 (1)
11x+5y=47 (2)
x is the number of hardback books
y is the number of paperback books
You can replace (1) in (2):
11x+5(x+3)=47
11x+5x+15=47
16x=47-15
16x=32
x=32/16
x=2
Then, you can replace the value of x in (1) to find the value of y:
y=2+3
y=5
According to this, the answer is that Jamal bought 5 paperback books.
which are linear pairs?
Match each table showing a proportional relationship between x and y with its constant of proportionality.
Answer:
Step-by-step explanation:
Just divide y by x and what ever you get is the answer
Hope this helps!
Answer:
The first one (1-4, 2-8, 3-12) belongs to 4
The second one (2-4, 4-8, 6-12) belongs to 2
The third one (4-6, 8-12, 12-18) belongs to 3/2
The last one (1-6, 2-12, 3-18) belongs to 6
Step-by-step explanation:
I divided the y numbers from the x
The price of an item has been reduced by 80% the original price was $20. What is the price of the item now ?
Answer:
Step-by-step explanation:
80% = 80/100 which also = 4/5
so the price was reduced by 4/5
20 minus 4/5 is = to 20 minus 16/20
which is 20/20 minus 16/20 = to 4/20
simplified is 4 dollars
(2x-7)^2=64 solve for x
solve for the missing missing variable C=2πr; C=18.84, π=3.14
Answer:
The missing variable r = 3
Step-by-step explanation:
C = 2πr
Where,
C = 18.84
π = 3.14
r= ?
The missing variable is r
C = 2πr
Making r the subject
r = C / 2π
= 18.84 / 2*3,14
= 18.84 / 6.28
= 3
r = 3
The missing variable r = 3
Check:
C = 2πr
18.84 = 2*3.14*3
18.84 = 18.84
write the expression (6-3i)+(5+4i) as a complex number in standard form
Answer:
[tex]11+i[/tex]
Step-by-step explanation:
So we have the expression:
[tex](6-3i)+(5+4i)[/tex]
Remove the parentheses:
[tex]=6-3i+5+4i[/tex]
Combine like terms:
[tex]=6+5-3i+4i[/tex]
Add:
[tex]=11+i[/tex]
This is in standard form. a is 11 and b is 1.
And we're done!
The solution to 3x2 – 12x + 24 = 0 is .
Answer:
Its a step by step to this question with a free tip
Step-by-step explanation:
Tip: Follow bodmas rule use this order to solve these equations
B-Brackets
O-Open
D=Divide
M=Multiply
A=Add
S=Subtract
3x2 = 6
= 6 - 12x + 24 = 0
=6 -0 +24 = 12x
= 30 = 12x
=x = 2.5
7x-(6x-1)=2. What is the answer?
Answer:
x=1
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
7x−(6x−1)=2
7x+−1(6x−1)=2(Distribute the Negative Sign)
7x+−1(6x)+(−1)(−1)=2
7x+−6x+1=2
(7x+−6x)+(1)=2(Combine Like Terms)
x+1=2
x+1=2
Step 2: Subtract 1 from both sides.
x+1−1=2−1
x=1
Which expression is equivalent to k+ 0.83k - 0.73k?
A.) k+ 0.1
B.)1+ 0.1k
C.)0.56k
D.)1.1k
Answer:
1.1k
Step-by-step explanation:
k+0.83k-0.73k
1.83k-0.73k
1.1k
Hope this helps ;) ❤❤❤
If m + 40 - 70, then m =
Answer:
m-30
Step-by-step explanation:
[tex]m + 40 - 70\\\\\mathrm{Add/Subtract\:the\:numbers:}\:40-70=-30\\=m-30[/tex]
Answer:
m - 30
I hope this helps!
Plz answer this. Plzzzzzzzzzzzzzzzzz
Answer:
2^3×6-5÷3-3×4^-4 solving 8×1÷0×0=8÷0= 8
Solve the proportions. Can you please solve this one problem for me it may not be too hard for you.
Answer: its 18, x=18
9:25 y 33:41:38 a que unidades de tiempo se refieren?
Answer:
Se refieren a las unidades de tiempo del sistema sexagesimal
9:25 son 9 minutos y 25 segundos
33:41:38 son 33 horas, 41 minutos y 38 segundos.
Step-by-step explanation:
El sistema sexagesimal se utiliza para medir tiempos y ángulos.
El tiempo se mide en horas,minutos y segundos
En cambio, los ángulos se miden en grados,minutos y segundos.
Los dos puntos '':'' sirven para separar las unidades.
La base de este sistema es el número 60 :
60 segundos ⇒ 1 minuto
60 minutos ⇒ 1 hora
Eso en cuanto a tiempo
En cuanto a grados :
60 segundos ⇒ 1 minuto
60 minutos ⇒ 1 grado
Cuando tengo dos números como en 9:25 , el número de la derecha corresponde a los segundos y el de la izquierda a los minutos
Entonces, 9:25 son 9 minutos y 25 segundos
Por otro lado, cuando tengo 3 números, como en 33:41:38, el número de la derecha corresponde a los segundos, el de en medio al de los minutos y el de la izquierda al de las horas (si nos referimos a unidades de tiempo).
Entonces, 33:41:38 son 33 horas, 41 minutos y 38 segundos.
Write a recursive formula for each sequence.
2,20, 200, 2000, ...
Answer:
1,2
Step-by-step explanation:
Mrs. Bell has an interest rate of 4.175% on her house. Mr. Bentley has an interest rate of 4.25% on his house. Which explains who has the lower interest rate?
Answer: Mrs Bell
Step-by-step explanation:
From the question, we are informed that Mrs. Bell has an interest rate of 4.175% = 0.04175 on her house and Mr. Bentley has an interest rate of 4.25% = 0.0425 on his house.
The person who has the lower interest is Mrs Bell. This is because 4.25% is higher than Mrs Bell's interest of 4.175%
Answer:
The answer is D
Step-by-step explanation:
Mrs bell has the lower interest rate because both decimals have a 4 in the ones place, and 1 tenth is less than 2 tenths.
Help needed ASAP will give BRAINLIEST
Answer:
95%
Step-by-step explanation:
One and a half hours is 90 minutes. Going up from the 90 at the bottom, it crosses the line at about 95%.
Answer:
95%
Step-by-step explanation: I am pretty sure it is at least let me know if I am wrong
HURRY PLEASE When 5 and 6 are multiplied by the same factor, how do the ratios compare to the ratio 5:6? The ratios are equivalent to 5:6. The ratios are equivalent to 6:5. The ratios are greater than 5:6, as the factors become greater. The ratios are greater than 6:5, as the factors become greater.
Answer:
The ratios are equivalent.
Step-by-step explanation:
If you multiply both 5 and 6, the ratio stays the same.
5:6 = 10:12 = 15:18 = 20:24 etc.
You can try this by dividing the larger number by the smaller number. You'll always get 1.2 as the "relationship", or ratio, is preserved.
24/20 = 1.2
15/18 = 1.2
10/12 = 1.2
6/5 = 1.2
evaluate
x
— + 6(x-12) when x=12
4
Answer:
3
Step-by-step explanation:
x=12
12/4 + 6(12-12)
12/4 +6(0)
12/4 + 0
3+0
3
2.18 as a mixed number
Answer:
2 9/50
Step-by-step explanation:
2.18
=>218/100
=>109/50
=>2 9/50
Answer:
2 9
/50
Step-by-step explanation:
Convert the decimal number to a fraction by placing the decimal number over a power of ten. Since there are 2 numbers to the right of the decimal point, place the decimal number over 10
^ 2
(
100
)
. Next, add the whole number to the left of the decimal.
2 18/100
Reduce the fractional part of the mixed number
2 9/50
The temperature on a cold winter day in Minnesota was-6. Which of the following situation
could explain how the temperature became -6? Select ALL that apply.*
(20 Points)
In the morning, the temperature was -2 degrees. Then, the temperature fell 4 degrees.
The temperature decreased by 4 degrees from a high of 2 degrees earlier in the day.
The temperature was 12 degrees. This temperature fell by 6 degrees as it got dark out.
At 9 a.m., the temperature was -11 degrees. By noon, the temperature had dropped 5 degrees.
At night the temperature was - 1 degree. Then, the temperature fell by 5 degrees during the next day.
The temperature was 15 degrees on Tuesday. A cold front dropped the temperature by 21 degrees at
night.
Answer:
1st,2nd,5th,6th
Step-by-step explanation:
i’ve gotten 4 different answers for this so if someone can help me that would be amazing
Simplifying the top:
(2* a^3 * b^5)^2 * (6ab)
4* a^6 *b^10 * (6ab)
24 *a^7 * b^11
so we have
(24 *a^7 * b^11) / (-3* a^5 *b)
immediately we can simplify 24 and -3
(-8 *a^7 * b^11) / ( a^5 *b)
a^7 and a^5 can cancel into just a^2
(-8 *a^2 * b^11) / (b)
b^11 and b cancels to b^10
-8 *a^2 * b^10
so that is your answer:
-8[tex]a^{2}[/tex][tex]b^{10}[/tex]
1+1= 2 2+2=4 4+4=8 8+8=16 16+16=32 IS THE TABLE CORRECT ?
(2x + 8) (3x + 17) solve for x
Answer:
x = 22.66
Step-by-step explanation:
Please help me quick!!!!!!
A number times six plus the same number times two
Answer:
6x +2x
Step-by-step explanation:
when the number= x, you can just form the equation as per usual. 6x = a number times 6; 2x = a number times 2.
x is used bc the number is an unknown value. only x can be used bc it is stated the same number. hsing different alphabets such as y or z indicates the unknown value ia different.
Answer:
[tex]x ^{2} + 8x + 12[/tex]
Step-by-step explanation:
This works because of the method called "foil"
PLEASE HELP Solve for w and simplify your answer.
Answer:
see below (I hope this helps!)
Step-by-step explanation:
To get rid of the coefficient of w, 3/2 in this case, we must divide the entire equation by 3/2, which is the equivalent of multiplying the entire equation by 2/3. Doing this, we get:
3/2w * 2/3 = -20 * 2/3
w = -40/3 = [tex]-13\frac{1}{3}[/tex]
I'm wondering what this means, I explained the equation but is it correct? Please help!!
Answer:
technically, unless it says somewhere that each ticket cost $1 none would be correct, but the answer your looking for is student B
Step-by-step explanation:
Answer:
im pretty sure student b is correct
because every 10 tickets they give away 5 dollars you replace y as 10 and 1/2 of 10 is 5 so you replace the 1/x with 5
btw im not 100% sure im correct
What is the volume of the cube below?
A. 4x2
B. 16
C. 4x
D. 16x2
Answer:
a.
Step-by-step explanation:
The volume of cube 4x².
What is Volume?Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that the volume of a closed form determines how much space it can occupy in three dimensions.
We have,
Edges of cube as = 4 , x and x.
So, volume of cube
= 4 x (x . x)
= 4 . x²
= 4x²
Thus, the volume of cube 4x².
Learn more about Volume here:
https://brainly.com/question/1578538
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what is the range set of 72,82,65,67,80,81,67
Answer:
17
Step-by-step explanation:
In this case, the data range is 82−65=17 82 - 65 = 17 .