MATHEMATICS MIDDLE SCHOOL

Evaluate each expression if a= (7)/(8), b = -(7)/(16), c = 0.8, d = (1)/(4)1) (a)/(b) - c + d

Answers

Answer 1
Answer:

Answer:−357/640

Step-by-step explanation:

it's the answer I thinl
Answer 2
Answer: 7/8 • (- 16/7)= -2
-2-4/5+1/4= -2 11/20 or -2.55

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Halla la medida del lado de un cuadrado cuya diagonal es de 14 cm​

Answers

Answer:

The length side of the square is 7√(2)\ cm

Step-by-step explanation:

The question in English is

Find the measure of the side of a square whose diagonal is 14 cmd

Let

d ----> the diagonal of a square in cm

b ---> the length side of a square in cm

we know that

Applying the Pythagorean Theorem

see the attached figure to better understand the problem

d^2=b^2+b^2

d^2=2b^2

we have

d=14\ cm

substitute the given value

14^2=2b^2

solve for b

196=2b^2

98=b^2

take square root both sides

b=√(98)\ cm

simplify

b=7√(2)\ cm

Select Is a Function or Is not a Function to correctly classify each relation. Title Is a Function Is not a Function {(2, 2),(4, 4),(6, 6),(8, 8)}
{(0, 3),(3, 5),(5, 6),(8, 4)}
{(1, 2),(3, 3),(4, 8),(6, 3)}
{(3, 4),(5, 2),(5, 6),(7, 3)}

Answers

A mapping is said to be function if each element in the domain is related with only one element in the range.Or you can say that a relation is a function also when two different elements in domain have same image or related with same element of the Co domain.

The elements which is related with elements of domain is called Co domain.

So , using the definition of function that i have written above you can classify that the relation is a function or not

1. {(2, 2),(4, 4),(6, 6),(8, 8)}

→→Each element is related with itself , no two different images have different Preimage, For example (2,3),(2,4) that is not happening in this case. so this relation is a function.This kind of function is called identity function.

2. (0, 3),(3, 5),(5, 6),(8, 4)→Different element have different images .So this Relation is a function.


3. (1, 2),(3, 3),(4, 8),(6, 3) →→→Here two elements have same image 3. But still this is a function because two elements in domain or preimage can have same image in a function.


4. (3, 4),(5, 2),(5, 6),(7, 3)→→→This is not a function because two different elements of image have same preimage that is image of 2,and 6 have same preimage which is 5. So this is not a function.

From The given options 1,2,3 are functions.


{(2, 2),(4, 4),(6, 6),(8, 8)} Is a function.
{(0, 3),(3, 5),(5, 6),(8, 4)} Is a function.
{(1, 2),(3, 3),(4, 8),(6, 3)} Is a function.
{(3, 4),(5, 2),(5, 6),(7, 3)} Is not a function. 

For a relation to be a function, every x value must have only one y value.

Hope this helps.

How do you solve this problem? 6 x 2/5 =

Answers

You have to make 2/5 into a whole number , in this case a decimal
2/5 in decimal form = 0.4 
To make it easier for you 0.4 by 10 and then it will become  4
So 6x4=24
Then divide by 10 which will become 2.4
The answer is 2.4

Peggy completed 5/6 of the math homework and Al completed 4/5 of the math homework. Did Peggy or Al complete more of the math homework?

Answers

Answer:

Peggy completed more of the math homework than Al

Step-by-step explanation:

we have

Peggy completed 5/6 of the math homework

Al completed 4/5 of the math homework

we know that

In order to be able to compare fractions more easily it is recommended that both have the same denominator

so

Multiply 5/6 by 5/5

5/6(5/5)=25/30

Multiply 4/5 by 6/6

4/5(6/6)=24/30

25/30> 24/30

therefore

Peggy completed more of the math homework than Al
Peggy 5/6 x 5 = 25/30
Al        4/5 x 6 = 24/30

Peggy completed more of the math homework

Please help me, i really don't understand this ​

Answers

Answer:

Look in the comments on your question for some guidance if you please to.

Step-by-step explanation:

6 ft4 ft12 ft8 ft what is the answer I'm stuck

Answers

If you mean adding up all of those, then the answer is 30ft in total

6+4+12+8
You need to figure out the cubic volume of each part separately.

For the big portion, multiply 6 x 4 x 12

For the smaller portion, multiply 8 x 4 x 4

Add the product of each part together
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