How do I solve variable problems such as, 7(2m + 6) + 8m?
How do I solve problems like that
Answers
= 7*2m+ 7*6+ 8m
= 14m+ 42+ 8m
= (14m+ 8m)+ 42 (combine like terms)
= 22m+ 42
The final answer is 22m+ 42~
Related Questions
The area of a rectangular playground is 420 sq.m, If the length is increased by 7 and breadth is decreased by 5, the area of the rectangular playground remains the same, find the length and breadth of the rectangular playground.
Can you answer number 4 and can you answer question 3.3)a convenience store sells two brands of orange juice. Brand A contains 11 fluid ounces and costs $2.31.Brand B contains 15 fluid ounces and costs $2.70. What is the difference in cost,the dollars,per fluid ounces between the two brands of juice?
Write an equation that involves multiplication, contains a variable, and has a solution of 5. Then write another equation that has the same solution and includes the same variable and numbers but use divison.
PLEASE HELP QUESTION ATTACHED
Answers
Answer
Find out the percent increase in the price per cheese stick.
To prove
As given
Cheese sticks that were previously priced at "5 for $1" are now "4 for $1".
i.e previously the price of the 5 cheese stick is $1 .
= 0.2
Now the price of the 4 cheese stick is $1 .
= 0.25
Change in price per cheese stick = now price - previous price
= 0.05
Formula
Put all the value in the formula
= 25%
Therefore the percent increase in the price per cheese stick is 25%.
.25-.20= .05
.05/.20= 25% increase in price per cheese stick
Answers
Answer
Find out the speed of the boat in still water .
To proof
Let us assume that the speed of the boat in still water be u .
As given
The speed of a stream is 4 mph
hence
speed upstream = u - 4
speed downstream = u + 4
Formula
As given
A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream.
First case for the upstream
Second case for the downstream
now compare the equations
simplify the equation
8( u +4 ) = 16 (u -4)
8u +32 = 16u - 64
8u = 96
u = 12 mph is the speed of the boat in still water .
Hence proved
The speed of the stream = 4 mph.
Let us assume speed of the boat in still water = x mph.
Total speed upstream = (x-4) mph.
Total speed downstream = (x+4) mph.
We know, time, speed and distance relation.
Time = Distance / Speed.
Total time taken upstream = 8 / (x-4)
Total time taken downstream = 16/(x+4).
Time taken upstream = time taken downstream.
Therefore,
8 / (x-4) = 16/(x+4).
On cross multiplication, we get
16(x-4) = 8(x+4).
16x - 64 = 8x +32.
Adding 64 on both sides, we get
16x - 64+64 = 8x +32+64
16x = 8x + 96.
Subtracting 8x from both sides, we get
16x-8x = 8x-8x + 96.
8x = 96.
Dividing both sides by 8, we get
x = 12.
Therefore, 12 mph is the speed of the boat in still water.
Answers
Answer:
Step-by-step explanation:
its 81 dollars
and Z(6,2)?
Answers
Answer:7.61577
Step-by-step explanation:
Answers
The percent of homeowners that do not have a cellphone is 20%.
What are percentages?
A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate the percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word percent means per 100. It is represented by the symbol “%”
Given here, Approximately 4/5 of U.S homeowners have a cell phone.
Therefore, the fraction of homeowners that do not own a cell phone is 1-4/5=1/5 and thus 1/5×100 = 20%
Hence, The percent of homeowners that do not have a cellphone is 20%.
Learn more about Percentages here:
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