If 2a=3b and 4a+b=21, then b =
Answers
Answer:
b=3
Step-by-step explanation:
2a=3b and 4a+b=21,
Multiply the first equation by 2
2(2a) = 2*3b
4a = 6b
Substitute this into the second equation
4a+b = 21
Replace 4a with 6b
6b+b = 21
Combine like terms
7b = 21
Divide each side by 7
7b/7 = 21/7
b = 3
Related Questions
100 POINTS!!! Identify this prism and describe it using the following vocabulary terms: base, edge, face, and vertex.
Answers
Answer:
This is a triangular prism. This is because prisms are identified by the shape of their base. The base of this prism is a triangle. This prism has 5 faces, 9 edges, and 6 vertices.
Step-by-step explanation:
This is a triangular prism. This is because prisms are identified by the shape of their base. The base of this prism is a triangle. This prism has 5 faces, 9 edges, and 6 vertices.
Find the surface area of the pyramid. A rectangular pyramid with length 45 centimeters and a width of 18 centimeters. On the side with 45 centimeters it has a slant height of 15 centimeters. On the side with 18 centimeters it has a slant height of 25.5 centimeters.
Answers
Answer:
166.5
Step-by-step explanation:
you have to kinda create it out on paper flat and just add all.
Good luck, i am blonde so maybe
lacy went to the fair. She paid $5 for the entrance fee. Each ride ticket cost $0.25. Lacy spent $12.50 at the fair. Which equation can be used to find how many ride tickets Lacey bought?
$0.25r + $5 = $12.50
$0.25r + $5r = $12.50
5r + $0.25 = $12.50
$0.25r - $5 = $12.50
Answers
Answer:
$0.25r + $5 = $12.50
Step-by-step explanation:
r represents the amount of rides Lacy went on during the day. If you do the problem in the correct order, you will get the answer
Step 1)
Subtract 5 from both sides
$0.25r + 5 (-5) = 12.50 (-5)
Step 2)
Divide by 0.25
0.25r (Divided by 0.25) = 7.50 (Divided by 0.25)
Step 3)
Answer
r = 30 rides
PLEASE HELP ASAP!!!
Find the percent error in this situation:
Experimental value: 4.8 g/cm3
Theoretical value: 5.8 g/cm3
Answers
Answer:
5.8
Step-by-step explanation: i am the admin
Hopefully it’s correct
Find the area of the figure colored in dark blue.
Answers
is it 0029% or 29% I need help
Answers
Answer:
Its 0.29% so your 2nd Answer is correct
2+ 1/2 I don't know the answer isn't that just sad but can you help me
Answers
Answer:
2.5 or 2 2 and 1/2 if u see anther whole number + 1/2 its just that number then .5 at the end :)
explanation: 1/2 = .5
2 + .5 = 2.5
hope this helps and it’s not sad, people learn at different paces :)
help meeeeeeeeeeeeee... please
Answers
Answer:
so 1st is cube w 2nd is cube p
Trevyn has 26.5 pounds of birdseed. He puts 13
pounds of birdseed in his feeder each day.
How many days will go by before Trevyn runs out of birdseeds?
Answers
10.
The Venn diagram represents the relationships between the sets and subsets of rational numbers.
Which set of numbers could be placed in Section B?
{–6, –3, –1, 0, 1, 3, 6}
{-2.23, -1.78, 3.99, 5.19}
Not here
I REALY NEED IT HEALP MEEE
Answers
Answer:
{_6, _3, _1,0,1,3,6}
Step-by-step explanation:
Help me find the values of x
1. 2x+1=9
2. 4x+3=19
3. 3x-2=7
Answers
2.)x = 4
3.)x= 3
____________________________________________________
If there's addition, use subtraction to find the value.If there's subtraction, use addition to find the value.x(y) means to multiply x with y____________________________________________________
1. In the first problem, we need to subtract 1 from 9 since there is an addition:
9 – 1 = 8
Next, divide 8 by 2, and we get:
8 ÷ 2 = 4
This means that x = 4
Finally, check the answer by:
2(4) + 1 = 9
2. In the second problem, we need to subtract 3 from 19 since there is an addition:
19 – 3 = 16
Next, divide 16 by 4, and we get:
16 ÷ 4 = 4
This means that x = 4
Finally, check the answer by:
4(4) + 3 = 19
3. In the third problem, we need to add 2 with 7 since there is subtraction:
2 + 7 = 9
Next, divide 9 by 3, and we get:
9 ÷ 3 = 3
This means that x = 3
Finally, check the answer by:
3(3) – 2 = 7
Hope this helps :)
Use the position-to-term rule to work out the first four terms of each sequence.
A. Term =position number + 5
B. term = 3 * position number -1
C. Term = position number to the power of 2+ 4
D. term = 3 *position number to the power of 2
Answers
B. 2, 5, 8, 11
C. 5, 8, 13, 20
D. 3, 12, 27, 48
Answer:
A. 6, 7, 8, 9 ;
B. 2, 5, 8, 11 ;
C. 5, 8, 13, 20 ;
D. 3, 12, 27, 48;
how do i simplify an improper fraction
Answers
3 2/3
hi! please help me D:
Answers
Answer:
I don't know what the first drop down menu would say, but he can make four batches of brownies.
Step-by-step explanation:
maybe tell me when it says in the comments?
Answer:
He can make 4 batches of brownies.
Step-by-step explanation:
He has 4/3 cups of brownies and he only needs 1/3 of that so he has enough to make 4 batches.
What is the price of the missing price of the pounds?
Answers
Answer:
$17.50
Step-by-step explanation:
You have a table with a proportional relationship between weight and price, and the pair (weight, price) = (2 lb, $7.00) given. You want to know the price for a weight of 5 lb.
ProportionA proportion that can be used to find the missing price is ...
price/weight = x/(5 lb) = ($7.00)/(2 lb)
Multiplying by 5 lb gives ...
x = $7.00 × (5 lb)/(2 lb) = $17.50
The price for 5 lb is $17.50.
Answer:$17.50
Step-by-step explanation:i uesd the calulater u wont read this anyway
The costs of buying a small piece of land and a small car in a remote village since the year 1990 are represented by the following tables:
Determine whether the data described in the tables is best modeled by a linear function or an exponential function.
Answers
Please provide the specific data or tables for the costs of buying a small piece of land and a small car since 1990, and I'll be happy to help you determine whether a linear or exponential function is the best model for the data.
Can someone answer this question for me? asap please
Answers
Answer:
a) If the volume of the prism on the left is 1029 m³, then the volume of the prism on the right is 1536 m³.
b) If the height of the prism to the left is 14 m, the height of the prism to the right will be 16 m.
c) If the surface area of the prism to the left is 392 m², the surface area of the prism to the right will be 512 m².
Step-by-step explanation:
a) To solve, set up a proportion. Volume is three-dimensional, so we need to cube.
(7/8)³=1029/x
Now we can solve using cross products to get 1536.
If the volume of the prism on the left is 1029 m³, then the volume of the prism on the right is 1536 m³.
b) To solve the second one, we also set up a proportion. Height is one-dimensional, so we will not need exponents here.
7/8=14/x
Solve using cross products to get 16.
If the height of the prism to the left is 14 m, the height of the prism to the right will be 16 m.
c) Now we are solving for area, which is two-dimensional. Therefore, we will need to square.
7/8²=392/x
Solve using cross products to get 512.
If the surface area of the prism to the left is 392 m², the surface area of the prism to the right will be 512 m².
Hope this helps and good luck on your homework! For additional resources, check out The Maths Prof: Similarity parts 1-3.
For her birthday party, Melonie wants to make a punch drink made with 2 1/2 gallons orange juice, 4 quarts cranberry juice, and 3 quarts apple juice. How much punch will she make?
Answers
Answer:
4.25 Gallons
Step-by-step explanation:
(2 1/2) US gallons) + (7 US quarts) =
4.25 US gallons
The cost of building an airplane with 200 seats is about $100 million. If the cost, in millions of dollars, c, is proportional to the number of seats, s, what equation can be used to determine the cost, in millions of dollars to build an airplane with any number of seats?
Drag one number to correctly complete the equation.
Answers
Answer: 2c+1s=x
Step-by-step explanation:
What is the equation of the line pictured?
HELP ASAP!
posted Feb 19 4:13 pm
Answers
i hope this helps
A composite figure has a radius of 10 cm.
A circle with radius of 10 centimeters. One-quarter of the circle is cut out of the figure.
What is the area of this composite figure? Use 3.14 for Pi.
23.55 centimeters squared
78.5 centimeters squared
235.5 centimeters squared
314 centimeters squared
Answers
Answer:
C, 235.5 cm^2
Step-by-step explanation:
Formula for area of circle:
A = πr^2
Where π represents pi(3.14 or 22/7) and r represents the radius.
Plug in given value (10):
A = πr^2
A = 3.14(10)^2
A = 3.14(100)
A = 314
Now they say a quarter of this circle is cut out, which means we have to first find out what a quarter of this area is:
314/4
= 78.5
A quarter of this circle is 78.5, so let's subtract this from the total area (314):
314 - 78.5
= 235.5 cm^2
The area is 235.5 centimeters squared.
Ryan rolls two fair number cubes labeled 1 through 6. What is the probability that the sum of the two number cubes is 5 or more?
Answers
Answer:
1/3.
Step-by-step explanation:
2 x 6 = 12
1 2 3 4 5 6
1 2 3 4 5 6
4/12 = 1/3
Answer:
1/3.
Step-by-step explanation:
2 x 6 = 12
1 2 3 4 5 6
1 2 3 4 5 6
4/12 = 1/3
HELP ANSWER THIS I WILL GIVE TEN POINTS AND THANKS!
REMEMBER TO EXPLAIN STEP-BY STEP! AND GET THE CORRECT ANSWER!
The units and tens digits of one-two digit integer are the tens and units digits of another two- digit integer, respectively. If the product of the two integers is 4930, what is their sum?
Answers
Answer:
(10t + u)(10u + t) = 4,930
100tu + 10t^2 + 10u^2 + tu = 4,930
101tu + 10t^2 + 10u^2 = 4,930
10t^2 + (101u)t + (10u^2 - 4,930) = 0
(101u)^2 - 4(10)(10u^2 - 4,930)
= 10,201u^2 - 400u^2 + 197,200
= 9,801u^2 + 197,200
We see that u = 5 gives 442,225.
√442,225 = 665
(10t + 5)(50 + t) = 4,930
500t + 10t^2 + 250 + 5t = 4,930
10t^2 + 505t - 4,680 = 0
2t^2 + 101t - 936 = 0
t = (-101 + √(101^2 - 4(2)(-936)))/(2×2)
= (-101 + √17,689)/4
= (-101 + 133)/4 = 32/4 = 8
So the numbers are 58 and 85.
58 + 85 = 143
I’ll give brainliest help ASAP don’t copy off website :)
Answers
Answer:
can i have a brainliest please
Step-by-step explanation:
thx
Need help, please...
Answers
> means more than. the _ under it means or equal to. what the equation is saying is that 10 is more than OR equal to 12. which isnt true because 10 is LESS than 12
Answer:
yes it is .
Step-by-step explanation:
you have to do all of the questions and add the answers together
Answers
Answer: Where is the question?
Step-by-step explanation:
I'm sorry, I'm not sure what you mean. Could you please clarify which questions you are referring to and what you would like me to add together?
If the dimensions of a figure are doubled, how many times larger will the volume be?
Answers
Answer:
2 Answers By Expert Tutors
Consider as an example a box of length L, width W, and height H. If all linear dimension are doubled the area becomes 4 (22) times the original
Step-by-step explanation:
Ms. Drohan studied for 5 hours and 18 minutes. How many minutes was that?
A. 300
B. 518
C. 318
D. 272
Answers
Answer:
C
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
5×60 = 300 (60 minutes in each hour)
300 + 18 = 318
Assessment started: undefined.
Item 1
Which statement is true?
Parallel lines will always be the same distance apart.
Parallel lines intersect to form four right angles.
Parallel lines intersect at no more than one point.
Answers
Parallel lines will always be the same distance apart.
HELP FAST! jenny is repainting her jewelry box shaped like a rectangular prism as shown. jenny will paint all faces of the outside of the jewelry box when it is closed. how many square feet will she paint?
Answers
Answer:
67.5 sq. ft.
Step-by-step explanation:
add the area of all the sides up.
L *W = A
plz rate brainliest lolll tysm