MATHEMATICS MIDDLE SCHOOL

Describe the rule of this function, and find the missing number8-->15
6-->11
10-->19
4-->?

Answers

Answer 1
Answer: -2,+4. If you put them in order, they will be simpler
4->?
6->11
8->15
10->19
so it is 4-->7

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Explain when you know you need to rename a mixed Number to subtract.

Answers

You know that you need to rename a mixed Number to subtract when the numbers involved have different denominators. In such a case, the lowest common multiple (LCM) of the denominators must be calculated and subsequently used to adequately rename the mixed numbers before subtraction can be done.

10. Make Sense and Persevere The flag of theBahamas includes an equilateral triangle. The
perimeter of the triangle is P= 3s, where s is
the side length. Solve for s. Use your formula to
find the dimensions of the flag in feet and the
area in square feet when the perimeter of the
triangle is 126 inches.

Answers

Answer:

  • s=(P)/(3)
  • Dimensions of the flag:

       lenght=6.65\ ft\n\nwidth=3.5\ ft

  • Area of the flag: 23.275\ ft^2

Step-by-step explanation:

The missing figure of the exercise is attached.

We know that the perimeter of the triangle is given by:

P= 3s

Where "s" is the side lenght of the triangle.

Solving for "s", we get:

s=(P)/(3)

Therefore, if the perimeter of the triangle is 126 inches, its side length is:

s=(126\ in)/(3)\n\ns=42\ in

 Since  1\ ft=12\ in, we know that "s" in feet is:

s=(42\ in)((1\ ft)/(12\ in))=3.5\ ft

The area of a rectangle can be calculated with this formula:

A=lw

Where "l" is the lenght and "w" is the width

We can observe in the figure that the lenght and the width of the flag are:

l=1.9s\nw=s

Then, the dimensions of the flag are:

l=1.9(3.5\ ft)=6.65\ ft\nw=3.5\ ft

And the area is:

A=(6.65\ ft)(3.5\ ft)=23.275\ ft^2

What percent of 60 is 15

Answers

25%.

15 = 25%
30 = 50%
45 = 75%
60 = 100%
15/60 = 1/4 or 25 %

or 
n% x 60 = 15  (the statement you wrote above changed into math)

.60n = 15  What allows me to move the decimal back two places?  Normally you can change a percent to a decimal by moving it back two places.  But if you don't know what the % is, you can move the number you are multiplying by back two places instead.
For example:   37 x .45 = .37 x 45  both = 16.65  - this shows that it doesn't matter which number is moved back two places - the answer will be the same.  You can't move n% back two places (because you can't move a number you don't know back two places) so just move the number you are multiplying by, namely 60, back two place - that is how I got .60

.60n=15
.60    .60          divide both sides by .60

n= 25%

Can you explain in words how do you solved 1 1/4 times 2.

Answers

You change the fraction to a decimal, which is 1.25, then multiply that by 2 on a calculator or paper. You will then get the answer 2 1/2!

Hope this helps!

you miss three out of 10 questions on a science quiz and four out of 15 questions on the math quiz which quiz has a higher percent of correct answers

Answers

Answer:

4 out of 15 has the higher correct answer percentage

Step-by-step explanation:

Step 1:  Find the percentages.

If you missed 3/10 questions, then you got 7/10 right.

7/10 = 70%

If you missed 4/15 questions, then you got 11/15 right.

11/15 = 73%

So, you scored a 70% on the science quiz, and a 73% on the math quiz.

ANSWER:

The math quiz.

What is the answer for -13=5(1+4m)-2m

Answers

m=-1 you distribute the 5 and you get -13=5+20m-2m than you get -13=5=18m than you subtract 5 from both sides and get -18=18m than you divide positive 18 and get -1=m
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