MATHEMATICS
COLLEGE

Answer: Let x-2 be the length.

The perimeter of a rectangle is P= (2lw)

52/4= 13

14+14+12+12 = 52 the width is 12 cm and the length is 14 cm

The perimeter of a rectangle is P= (2lw)

52/4= 13

14+14+12+12 = 52 the width is 12 cm and the length is 14 cm

Answer: Why not ask me a little guy tiger king and boy he I was like always wbu I was just told sitting

MIDDLE SCHOOL

Solve the formula I=Prt to find the principal, P, when I=$162, r=3.6%, and t=3 years.

Answer:

1500$

Step-by-step explanation:

The formula to use in this problem is the one for the simple interest:

where:

I is the interest

P is the principal

r is the rate of interest

t is the time

In this problem, we have:

I=$162 (interest)

r=3.6%, which we can rewrite as

and

t=3 years

Therefore, re-arranging for P, we find the principal:

HIGH SCHOOL

Use numerals instead of words. If necessary, use decimals instead of fractions.Harry is making gift bags for a holiday party using two types of candies. He has a total of 84 chocolate candies and 56 peppermint candies. Each gift bag he makes will be the same.If Harry uses all of his candy, he can make at most gift bags. Each gift bag will have chocolate candies and peppermint candies.

The answer for your question is 28

MIDDLE SCHOOL

Maggie used the commutative property to write StartFraction 4 Over 5 EndFraction + 6.9 y minus 8 as the equivalent expression 6.9 y + 8 minus StartFraction 4 Over 5 EndFraction. Did Maggie apply the commutative property correctly? Why or why not? a. Yes, the terms with variables should be written first.

b. Yes, there is the same number of terms.

c. No, some of the terms changed signs.

d. No, there should be two terms in parentheses.

Answer:

The correct answer is C. No, some of the terms changed signs.

Step-by-step explanation:

Maggie wrote:

4/5 + 6.9y - 8 as the equivalent expression of:

6.9y + 8 - 4/5

She did not apply the commutative property correctly because she changed the signs of 4/5 and 8 and in consequence, the result will not be the same.

The correct answer is C. No, some of the terms changed signs.

Answer:

c

Step-by-step explanation:

HIGH SCHOOL

Cotx-1/ cotx+1 = 1-tanx/1+tanx

Sinxcosx−1sinxcosx+1=1−cosxsinx1+cosxsinx

sinx−cosxcosxsinx+cosxcosx=sinx−cosxsinxsinx+cosxsinx

sinx−cosxcosx⋅cosxsinx+cosx=sinx−cosxsinx⋅sinxsinx+cosx

sinx−cosxsinx+cosx=sinx−cosxsinx+cosx

hence, proved

sinx−cosxcosxsinx+cosxcosx=sinx−cosxsinxsinx+cosxsinx

sinx−cosxcosx⋅cosxsinx+cosx=sinx−cosxsinx⋅sinxsinx+cosx

sinx−cosxsinx+cosx=sinx−cosxsinx+cosx

hence, proved

MIDDLE SCHOOL

19m=2 and g=3, what is 3(m+3g)-(2m)

The answer is 27.1052631579 or 27.1 if you rounded "m" to .10

MIDDLE SCHOOL

How do solve the fraction 5 1\4 - 13/9=

Turn them into improper fractions. So,

21/4 - 13/9. Then give them common denominators; for this problem, just use their least common multiple; 36. So,

189/36 - 52/36. So you get,

137/36. Simplify,

3 29/36.

21/4 - 13/9. Then give them common denominators; for this problem, just use their least common multiple; 36. So,

189/36 - 52/36. So you get,

137/36. Simplify,

3 29/36.

First you turn both fractions into improper fractions

Next multiply 9/9 times 21/4

Then multiply 4/4 times 13/9

Now you have common denominators

Next find the answer to the problem

Finally , simplify your answer

Your welcome

Next multiply 9/9 times 21/4

Then multiply 4/4 times 13/9

Now you have common denominators

Next find the answer to the problem

Finally , simplify your answer

Your welcome

HIGH SCHOOL

Mrs. Julien’s and Mrs. Castillejo’s classes are selling cookie dough for a school fundraiser. Customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. Mrs. Julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $112.50. Mrs. Castillejo’s class sold 8 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $124.50 (a) Write the system of equations that model the problem. Be sure to explain which equation represents which situation.

(b) Find the cost of each type of cookie. Show your work.

(c) Explain which method you used to solve the system and why you chose that method.

Answer: the cost of one package of macadamia nut chip cookie dough is $1.5

the cost of one package of triple chocolate cookie dough is $2.5

Step-by-step explanation:

Let x represent the cost of one package of macadamia nut chip cookie dough.

Let y represent the cost of one package of triple chocolate cookie dough.

Mrs. Julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $112.50. This means that

25x + 30y = 112.5 - - - - - - - - - - - - -1

Mrs. Castillejo’s class sold 8 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $124.50. This means that

8x + 45y = 124.5 - - - - - - - - - - -2

Multiplying equation 1 by 8 and equation 2 by 25, it becomes

200x + 240y = 900

200x + 1125 = 3112.5

Subtracting, it becomes

- 885y = - 2212.5

y = - 2212.5/- 885

y = 2.5

Substituting y = 2.5 into equation 1, it becomes

25x + 30 × 2.5 = 112.5

25x + 75 = 112.5

25x = 112.5 - 75 = 37.5

x = 37.5/25 = 1.5

The method used is the elimination method. It is more convenient to use.

MIDDLE SCHOOL

Solve the equation for x. For each step, describe the operation and/or property used. 5(2x - 4) - 11 = 4 + 3x

PLEASE HELP

Answer:

x = 5

Step-by-step explanation:

Start by distributing the 5 to remove parentheses. To do this multiply the numbers and variable in the parentheses by 5.

10x - 20 - 11 = 4 + 3x

Next. you want to get the variables to one side. This is done by subtracting 3x from both sides.

7x - 20 - 11 = 4

Now solve the -20 - 11.

7x - 31 = 4

You need to have the variable all by itself. To do this, first add -31 to both sides.

7x = 35

Finally divide by 7.

x = 5

Hope this helped.

COLLEGE

In a certain town 22 of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor the measure

Answer:

4.6

Step-by-step explanation:

Allow me to revise your question and hope it will be the same as the original one:

In a certain town 22% of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor the measure

a. 1.9

b. 13

c. 4.6

d. 3.6

Here is my answer:

Given:

- 22% of voters favor a given ballot = 0.22
- Groups of 21 voters

So the variance is: 21*0.22 = 4.6

We choose B

What is the equation.