# How to do percent equations easily

QUESTION POSTED AT 14/12/2019 - 05:45 PM

QUESTION POSTED AT 14/12/2019 - 05:45 PM

Make the percent into a decimal.

**Answer:**

She can buy 50 cherry candies if she wishes to spent the entire $25 on cherry candies

**Step-by-step explanation:**

Cost of each licorice sticks = $0.75

Cost of each cherry candy = $0.50

Total budget = $25

Equation to represent her expenses is **0.75x + 0.5y = 25**

where x is the number of licorice sticks and y is the number of cherry candies

Let the number of cherry candies she can buy be c.

So,

Cost of each cherry candy * Number of cherry candies = Total budget

=> 0.50 x c = 25

We get

0.50c = 25

We need to eliminate 0.50 from the left so we divide both sides by 0.50

Cancelling out 0.50 from the top and bottom of the left side we get,

**c = 50**

**So, she can buy 50 cherry candies if she wishes to spent the entire $25 on cherry candies.**

ANSWERED AT 18/01/2020 - 01:14 PM

QUESTION POSTED AT 18/01/2020 - 01:14 PM

False, just divide 20 by -4 to get correct answere.

ANSWERED AT 18/01/2020 - 01:08 PM

QUESTION POSTED AT 18/01/2020 - 01:08 PM

Standard form for y+7=-2/5(x-10) is y=-7-2/5(x-10)

ANSWERED AT 18/01/2020 - 01:07 PM

QUESTION POSTED AT 18/01/2020 - 01:07 PM

Correct - wrong percentage

-------------------- = ---------------

wrong 100

68 - 60 x

--------- = ----

60 100

8 x

---- = ----

60 100

800 60x

----- = ----

60 60

13.3% = x

-------------------- = ---------------

wrong 100

68 - 60 x

--------- = ----

60 100

8 x

---- = ----

60 100

800 60x

----- = ----

60 60

13.3% = x

ANSWERED AT 18/01/2020 - 01:04 PM

QUESTION POSTED AT 18/01/2020 - 01:04 PM

C. 2x+3y=12 is written in standard form

ANSWERED AT 18/01/2020 - 01:02 PM

QUESTION POSTED AT 18/01/2020 - 01:02 PM

C is in slope intercept form

ANSWERED AT 18/01/2020 - 12:59 PM

QUESTION POSTED AT 18/01/2020 - 12:59 PM

2x + y = 4

y = -2x + 4

Perpendicular Slope: ¹/₂

y = -2x + 4

Perpendicular Slope: ¹/₂

ANSWERED AT 18/01/2020 - 12:59 PM

QUESTION POSTED AT 18/01/2020 - 12:59 PM

ANSWERED AT 18/01/2020 - 12:57 PM

QUESTION POSTED AT 18/01/2020 - 12:57 PM

Y= -20x+240 there ya go bud ;)

ANSWERED AT 18/01/2020 - 12:56 PM

QUESTION POSTED AT 18/01/2020 - 12:56 PM

32.5? that could be an accuret answer

ANSWERED AT 18/01/2020 - 12:55 PM

QUESTION POSTED AT 18/01/2020 - 12:55 PM

**Answer and explanation:**

**Given : **Equations and

**To find : **Which statements about the system are true? Check all that apply.

**Solution : **

**First we solve the system of equations,**

.....(1)

......(2)

**Substitute y from (1) in (2),**

**Substitute the value of x in (1),**

1) The system has one solution i.e.

2) The system has solution which means it is not parallel lines.

Writing equation in slope from,

where m=1 and c=-4

where and c=-4

3) Both lines have different slopes.

4) Both lines have the same y-intercept.

5) The equations represent the different lines.

6) The lines intersect at

ANSWERED AT 18/01/2020 - 12:54 PM

QUESTION POSTED AT 18/01/2020 - 12:54 PM

3y-5y+10=36

combine like terms

-2y+10=36

subtract 10 from both sides

-2y = 26

divide both sides by -2

y = - 13

so the answer is a

combine like terms

-2y+10=36

subtract 10 from both sides

-2y = 26

divide both sides by -2

y = - 13

so the answer is a

ANSWERED AT 18/01/2020 - 12:52 PM

QUESTION POSTED AT 18/01/2020 - 12:52 PM

To find the inverse of the the function, it must be arranged in such a way that the independent variable be on the left side and the dependent variable on the right. So,

f(x) = y = 3x/ (8 + x)

y (8 + x) = 3x

8y + xy = 3x

8y = 3x - xy

8y = x (3 - y)

8y / (3-y) = x

x = 8y / (3 -y)

Therefore,

f-(x) = f(y) = x = 8y/ (3 - y)

f(x) = y = 3x/ (8 + x)

y (8 + x) = 3x

8y + xy = 3x

8y = 3x - xy

8y = x (3 - y)

8y / (3-y) = x

x = 8y / (3 -y)

Therefore,

f-(x) = f(y) = x = 8y/ (3 - y)

ANSWERED AT 18/01/2020 - 12:50 PM

QUESTION POSTED AT 18/01/2020 - 12:50 PM

__Answer__

40%

__Explanation__

A parentage value is a value that has been compared to 100.

Percentage = (change in the value)/(the original value) × 100%

= (35-25)/25 × 100%

= 10/25 × 100%

= **40%**

ANSWERED AT 18/01/2020 - 12:49 PM

QUESTION POSTED AT 18/01/2020 - 12:49 PM

35 Percent of 70 is 24.5

We assume, that the number 70 is 100% - because it's the output value of the task. We assume, that x is the value we are looking for. If 70 is 100%, so we can write it down as 70=100%. We know, that x is 35% of the output value, so we can write it down as x=35%. Now we have two simple equations: 1.)70=100% 2.)x=35%where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that: 70/x=100%/35% Now we just have to solve the simple equation, and we will get the solution we are looking for.

We assume, that the number 70 is 100% - because it's the output value of the task. We assume, that x is the value we are looking for. If 70 is 100%, so we can write it down as 70=100%. We know, that x is 35% of the output value, so we can write it down as x=35%. Now we have two simple equations: 1.)70=100% 2.)x=35%where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that: 70/x=100%/35% Now we just have to solve the simple equation, and we will get the solution we are looking for.

ANSWERED AT 18/01/2020 - 12:47 PM

QUESTION POSTED AT 18/01/2020 - 12:47 PM

Just multiply both sides by b

a=cb

then divide both sides by c

a/c = b

so b = a/c

a=cb

then divide both sides by c

a/c = b

so b = a/c

ANSWERED AT 18/01/2020 - 12:47 PM

QUESTION POSTED AT 18/01/2020 - 12:47 PM

**Answer:**

105%.

**Step-by-step explanation:**

We are asked to convert 1.05 to a percent.

To convert a decimal to percent, we simply multiply the decimal number by 100 and add a percentage sign.

Let us multiply 1.05 by 100.

**Therefore, 1.05 as a percent would be 105%.**

ANSWERED AT 18/01/2020 - 12:44 PM

QUESTION POSTED AT 18/01/2020 - 12:44 PM

**a=2,b=11,and c=-6 your answer **

ANSWERED AT 18/01/2020 - 12:43 PM

QUESTION POSTED AT 18/01/2020 - 12:43 PM

The first part is already in squared terms. "19.25 sq ft"
Taking the measurements for the mirror 3ft and 5ft, you'd get: "15 sq ft."
Subtract that answer from the previous number to get "4.25 sq ft.

Hope this helps out a little lol :)

Hope this helps out a little lol :)

ANSWERED AT 18/01/2020 - 12:38 PM

QUESTION POSTED AT 18/01/2020 - 12:38 PM

Value of the coin times number of coins summed up equal total value

so since we have "$2.10 in all"...

0.05n + 0.25q = 2.10

and we are told that there are "four times as many quarters as nickels"

this translates to

q = 4n

**0.05n + 0.25q = 2.10**

**and**

**q = 4n**

are your two equations that could be used to solve this problem

if you would like to know how many nickels and how many quarters there are, plug in q = 4n into the first equation and get

0.05n + 0.25(4n) = 2.10

multiply

0.05n + 1n = 2.10

add like terms

1.05n = 2.10

divide both sides by 1.05

n = 2.10/1.05 = 2

then plug that back into

q = 4n

so

q = 4(2) = 8

therefore you have

**2 nickels**

**and**

**8 quarters**

so since we have "$2.10 in all"...

0.05n + 0.25q = 2.10

and we are told that there are "four times as many quarters as nickels"

this translates to

q = 4n

are your two equations that could be used to solve this problem

if you would like to know how many nickels and how many quarters there are, plug in q = 4n into the first equation and get

0.05n + 0.25(4n) = 2.10

multiply

0.05n + 1n = 2.10

add like terms

1.05n = 2.10

divide both sides by 1.05

n = 2.10/1.05 = 2

then plug that back into

q = 4n

so

q = 4(2) = 8

therefore you have

ANSWERED AT 18/01/2020 - 12:38 PM

QUESTION POSTED AT 18/01/2020 - 12:38 PM

x = 5 + 4 or -5 + 4

x = 9 or -1

ANSWERED AT 18/01/2020 - 12:38 PM

QUESTION POSTED AT 18/01/2020 - 12:38 PM

Y^2 - Y^1/ X^2 - X^1 os the formula that you would use to find the line that passes through those points.

ANSWERED AT 18/01/2020 - 12:37 PM

QUESTION POSTED AT 18/01/2020 - 12:37 PM

The value of the coin times the number of coins, summed up, equals the total value

the value of a quarter is $0.25

and quarters can be represented as a q

the value of nickels are $0.05

and can be represented with an n

there are 84 quarters and nickels in total

so

q + n = 84

which have a total value of $17.80

so

0.25q + 0.05n = 17.80

the q + n = 84 can be rearranged by subtracting q from both sides

n = 84 - q

then we can plug that into the 0.25q + 0.05n = 17.80 equation

and get

0.25q + 0.05(84 - q) = 17.80

or

**0.05(84 - q) + 0.25 = 17.80**

therefore your answer is**D.**

the value of a quarter is $0.25

and quarters can be represented as a q

the value of nickels are $0.05

and can be represented with an n

there are 84 quarters and nickels in total

so

q + n = 84

which have a total value of $17.80

so

0.25q + 0.05n = 17.80

the q + n = 84 can be rearranged by subtracting q from both sides

n = 84 - q

then we can plug that into the 0.25q + 0.05n = 17.80 equation

and get

0.25q + 0.05(84 - q) = 17.80

or

therefore your answer is

ANSWERED AT 18/01/2020 - 12:37 PM

QUESTION POSTED AT 18/01/2020 - 12:37 PM

Find the equations of the lines in slope-intercept form which is y=mx+b where m=slope b=y intercept

the choices:

0 solutions: means the lines don't intercect at all, meaning same slope but different y intercept or they ar paralell

1 solution: lines intercect in 1 point

2 solutions: curvy line with a straight line thorugh middle

infinetly solutions: same line

to find slope you do

slope=(y1-y2)/(x1-x2)

first line is

(2,-7)

(0,6)

(x,y)

x1=2

y1=-7

x2=0

y2=6

subsitute

(-7-6)/(2-0)=-13/2

slope=-13/2

subsitute

y=-13/2x+b

subsitute one of the points

(0,6)

x=0

y=6

6=-13/2(0)+b

6=0+b

6=b

y=-13/2+6

now solve for the other equation

(3,0)

(0,-3)

x1=3

y1=0

x2=0

y2=-3

subsitute

(0-(-3))/(3-0)=(0+3)/(3)=3/3=1

y=1x+b

subsitute

(3,0)

x=3

y=0

0=1(3)+b

0=3+b

subtract 3

-3=b

y=x-3

we have the lines

y=-13/2x-6 and

y=x-3

solve for a common solution

y=x-3 and y=-13/2x-6 therefor

x-3=-13/2x-6

add 6 to both sides

x+3=-13/2x

multiply both sides by -2

-2x-6=13x

add 2x to both sides

-6=15x

divide both sides by 15

-2/5=x

subsitute

y=x-3

y=-2/5-3

y=-3 and 2/5 or -17/5

the solution is (-2/5, -17/5)

there is only one solution

the answer is B

the choices:

0 solutions: means the lines don't intercect at all, meaning same slope but different y intercept or they ar paralell

1 solution: lines intercect in 1 point

2 solutions: curvy line with a straight line thorugh middle

infinetly solutions: same line

to find slope you do

slope=(y1-y2)/(x1-x2)

first line is

(2,-7)

(0,6)

(x,y)

x1=2

y1=-7

x2=0

y2=6

subsitute

(-7-6)/(2-0)=-13/2

slope=-13/2

subsitute

y=-13/2x+b

subsitute one of the points

(0,6)

x=0

y=6

6=-13/2(0)+b

6=0+b

6=b

y=-13/2+6

now solve for the other equation

(3,0)

(0,-3)

x1=3

y1=0

x2=0

y2=-3

subsitute

(0-(-3))/(3-0)=(0+3)/(3)=3/3=1

y=1x+b

subsitute

(3,0)

x=3

y=0

0=1(3)+b

0=3+b

subtract 3

-3=b

y=x-3

we have the lines

y=-13/2x-6 and

y=x-3

solve for a common solution

y=x-3 and y=-13/2x-6 therefor

x-3=-13/2x-6

add 6 to both sides

x+3=-13/2x

multiply both sides by -2

-2x-6=13x

add 2x to both sides

-6=15x

divide both sides by 15

-2/5=x

subsitute

y=x-3

y=-2/5-3

y=-3 and 2/5 or -17/5

the solution is (-2/5, -17/5)

there is only one solution

the answer is B

ANSWERED AT 18/01/2020 - 12:36 PM

QUESTION POSTED AT 18/01/2020 - 12:36 PM

we have

we know that

If is a solution of the equation

then

the value of n must satisfied the equation

__Substitute the value of n in the equation__

----> the equation is true

so

The value of n is a solution of the equation

therefore

__the answer is the option B__

ANSWERED AT 18/01/2020 - 12:36 PM

QUESTION POSTED AT 18/01/2020 - 12:36 PM

| x - (-30) |

which can be simplifed into

| x + 30 |

We use absolute value because distance cannot be negative.

Laurie must stay within 10 feet. Therefore, the distance x is from -30 feet has to be equal to 10 to find the maximum and minimum depths that Laurie can stay between:

| x + 30 | = 10

When we solve this absolute value equation, we work with two cases.

Case 1: When x + 30 is positive, then |x+30| = x+30 (no change) and we have the equation

x + 30 = 10

Case 2: When x + 30 is negative, then |x+30| = -(x+30) so as to force the distance into a positive number. Then this gives us the equation

-(x+30) = 10

which we can multiply both sides by -1 to get

x + 30 = -10

ANSWERED AT 18/01/2020 - 12:35 PM

QUESTION POSTED AT 18/01/2020 - 12:35 PM

Y = -6x-2

since -2 is the y intercept

since -2 is the y intercept

ANSWERED AT 18/01/2020 - 12:35 PM

QUESTION POSTED AT 18/01/2020 - 12:35 PM

Intersecting but not at a right angle

ANSWERED AT 18/01/2020 - 12:30 PM

QUESTION POSTED AT 18/01/2020 - 12:30 PM

Given the model:

s(t) = gt2 + v0t + s0

and the details of the system, we have:

g = -4.9

v0 = 39.2 m/s

s0 = 0

Plugging in these values to the model, we have:

s(t) = -4.9t2 + 39.2t

The second options is the answer.

s(t) = gt2 + v0t + s0

and the details of the system, we have:

g = -4.9

v0 = 39.2 m/s

s0 = 0

Plugging in these values to the model, we have:

s(t) = -4.9t2 + 39.2t

The second options is the answer.

ANSWERED AT 18/01/2020 - 12:27 PM

QUESTION POSTED AT 18/01/2020 - 12:27 PM

It should be C because if x can be any value then y is most likely the same because it doesnt have a stated value. #TeamAlvaxic

ANSWERED AT 18/01/2020 - 12:23 PM

QUESTION POSTED AT 18/01/2020 - 12:23 PM