It takes 3 people a total of 192 hours to build a wall. How long would it take if 12 people built the same wall?
Step-by-step explanation:
you need to solve this using fractions.
Example :
It takes 3 men 8 hours to build a wall. How long would it take 4 men to build the same wall?
For 3 men: It is 1 wall divided by 8 hours, which is 1/8.
For 1 man: It is 1/8 divided by 3, which is 1/24.
For 4 men: It is 1/24 multiplied by 4, which is 1/6, = 6 hours.
A . expression A
B . expression B
C . expression C
D . expression D
ill mark u brainliest if u answer !
Answer:
answer choice B.
Step-by-step explanation:
Evaluate the exponential function
f(x) = 3x ; x = -2
Answer:
-6
Step-by-step explanation:
Plug (-2) in for X in the equation
3(-2)
-6
Jack and beth are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of shiny wrapping paper. Jack sold 5 rolls of plain and 8 rolls of shiny for a total of $190. Beth sold of 5 rolls plain and 3 shiny for a total of $90. Find the cost of each roll of wrapping paper
Answer:
Cost of a roll of plain wrapping paper = $6
Cost of a roll of shiny wrapping paper = $20
Step-by-step explanation:
Let [tex]x[/tex] denotes cost of a roll of plain wrapping paper and [tex]y[/tex] denotes cost of roll of shiny wrapping paper.
Jack sold 5 rolls of plain and 8 rolls of shiny for a total of $190.
[tex]5x+8y=190\,\,\,(i)[/tex]
Beth sold of 5 rolls plain and 3 shiny for a total of $90.
[tex]5x+3y=90\,\,\,(ii)[/tex]
Subtract (ii) from (i).
[tex]8y-3y=190-90\\5y=100\\y=20[/tex]
Put [tex]y=20[/tex] in (ii)
[tex]5x+3(20)=90\\5x+60=90\\5x=90-60\\5x=30\\x=6[/tex]
Therefore,
Cost of a roll of plain wrapping paper = $6
Cost of a roll of shiny wrapping paper = $20
1 and 1/5y+3/10y-1/2y=1/3y+2/5
Answer: y=12/20=0.6
Step-by-step explanation:
Rephrase the given equation
1 and 1/5y+3/10y-1/2y=1/3y+2/5
6/5y+3/10y-1/2y=1/3y+2/5
Find the GCF (greatest common factor) and multiply it on both sides
(6/5y+3/10y-1/2y)×30=(1/3y+2/5)×30
36y+9y-15y=10y+12
Add like terms together
30y=10y+12
Subtract 10y on both sides
30y-10y=10y+12-10y
20y=12
Divide 20 on both sides
20y/20=12/20
y=12/20=0.6
Hope this helps!!
Please let me know if you have any questions
can anyone solve this?
The surface area of a sphere is π sq.cm. If its radius is
doubled by,how much is its surface area increased ?
Answer:
hope it helps..........
8th grade math! If you know the answer to this problem please interact(:
Answer:
the third one (-2,1)
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
so solving the first one we get
y=2x+5
and the second one we get
y=5x+10+1
y=5x+11
substiuting we get
2x+5=5x+11
3x=-6
x=-2
and y= 1
so it would be C
if my answer helps please mark as brainliest.
what does the perpendicular bisector of a line mean?
Answer:
A line segment perpendicular to and passing through the midpoint.
Step-by-step explanation:
Was hit with a hard one. Can someone explain this to me please?
Answer:
Step-by-step explanation:
Mia's dog, Chulo, weighs 13.8 pounds. How many ounces does her dog weigh?
Answer:
220.8 ounces
Chulo weighs 220.8 ounces
AYO PLEASE HELP ILL GOVE YOU BRAINLIEST
it's a i think, hope this helps
95 is 5% of what number
1,900 I think, I hope this helps
Answer:
1900 that's what was right for me.
Step-by-step explanation:
2 /8 The Math Club’s spring banquet was a huge success, and Ray and Aletha are calculating the tip. The total bill was $360. What is the amount of tip that Ray and Aletha if they leave a 20% tip? $50 $542 $72 $56
Answer:
$72
Step-by-step explanation:
im guessing
3. 5x² + 13x = -6 * SHOW WORK *
What is the volume of this figure?
Answer:
875 ft^3
Step-by-step explanation:
Pick them apart starting at the bottom. The formul used is V=lwh
Starting at the bottom we have we have a sqare of 5 ft = 5ft^3= V = 125 ft^3
Then we have a rectangular prism: 5 x 5 x 20 = V = 500 ft^3
Third we have 5 x 5 x 10 = V = 250 ft3
125+500+250 = 875 ft^3
pls help me for brain list and a thanks and a 5 star review
3/4 + 2/4 = 6/4 or 3/2
Use the number line to add, second choice is simplified
solve the equation t8/t2 = _____
Answer:
[tex]t^{6}[/tex]
Step-by-step explanation:
I am going to assume exponents for this question.
[tex]\frac{t^{8}}{t^{2}}[/tex]
When dividing exponents with the same base, it is simply subtraction, so 8 - 2 = 6 which produces the answer.
You are making curtains for your little sister's dollhouse. There are 24 windows on the dollhouse and each
needs 3.75 inches of fabric for curtains. How much fabric will you need?
(please help I only have a couple of minutes)
Answer:
90 inches
Step-by-step explanation:
24 x 3.75 which is the same as 24 x 3 3/4 which is the same as
24 x 15/4 = 6 x 15 = 90
x + y = 5.90
2x + 4y = 16.80
The temperature dropped 20 degrees from noon to midnight. The temperature at midnight was 24°F. Write and solve an equation to find the temperature at noon?
Which of the following quantities are to the left of zero on a number line? Select three that apply.
A The opposite of 7
B The opposite of -9
С
3
D
-4
m
Answer:
A, D, and E
Step-by-step explanation:
because they are negative
Simplify the expression:
(6y + 10) - (2y + 3)
show work if u can
Answer:
4y + 7
Step-by-step explanation:
(6y + 10) - (2y + 3)
6y - 2y = 4y
10 - 3 = 7
4y + 7
4х +7
у+ 1
Зу — 11
12x – 1
Help with this plz ASAP
Answer: y=2x-4
Step-by-step explanation:
I need help with Geometry
Answer:
1st option
Step-by-step explanation:
We see that one angle is 28, so because of alternate interior angles, angle two is also 28. Angle one is 90 because those two lines are perpendicular and the only available options for A is 90, and measurement angle 3 is going to be 180 - (90 + 28) (sum of interior angles in a triangle) and you're going to get 62.
Let me know if you have any questions
triangle not drawn to scale
5 units
4 units
8 units
11 units
What kind of triangle is this?
O A.
isosceles triangle
OB. right triangle
OC. equilateral triangle
OD
scalene triangle
Answer:
D. scalene triangle
Step-by-step explanation:
This triangle has sides that all have different lengths. Therefore, this triangle is a scalene triangle.
Tips:
Isosceles triangle - two sides have equal lengths
Equilateral triangle - all three sides have equal lengths
I hope this helped! :)
Two trains leave stations 520 miles apart at the same time and travel toward each other. One train travels at 110 miles
per hour while the other travels at 90 miles per hour. How long will it take for the two trains to meet?
Do not do any rounding.
Answer:
They wont meet
Step-by-step explanation:
The one going 110 will pass before the other one can reach it.
Please mark me the brainliest, 5 stars, and a thanks! Have a great day!
It will take 2.6 hours (or 2 hours and 36 minutes) long for the two trains to meet when Two trains leave stations 520 miles apart at the same time and travel toward each other.
To find the time it will take for the two trains to meet, we can use the concept of relative speed.
The two trains are traveling towards each other, so their speeds add up. The combined speed of the two trains is:
110 mph + 90 mph = 200 mph
To determine the time it will take for the trains to meet, we can divide the total distance they need to cover (520 miles) by their combined speed (200 mph):
Time = Distance / Speed
Time = 520 miles / 200 mph
Time = 2.6 hours
Therefore, it will take 2.6 hours (or 2 hours and 36 minutes) for the two trains to meet.
To know more about long click here :
https://brainly.com/question/28373809
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hannah is making jewlery for an Arts and Crafts show. She would like to make at least $120 in sales. She only made 40 pieces of jewlery. The earrings that she is selling cost $3 and the necklaces $6.
Answer:
she could make 40 earrings or 20 necklaces
Step-by-step explanation:
Write an inequality for the graph below.
'न
34
10
।। 12 13 14
Answer:
i like cheese wbu hahahahahaha
