MATHEMATICS MIDDLE SCHOOL

Need help answering this 11⁄14 – 4⁄7=
( IN FRACTION FORM)

Answers

Answer 1
Answer: Hi,

Alrighty...

Step One: Common Denominator
11/14 - 11/7

To do this, multiply the second fraction by 2-

11/7 * 2/2 = 22/14

So now you have the problem: 11/14 - 22/14

11-22 = -11
(And the denominators stay the same)

So your answer is -11/14.

Makes sense?

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What is the value of x?1. 6( -3 - x) - 2x = 14
x=

2. 2/7x + 6 + 17x = 18
x=

Answers

1) expand the brackets 
6(-3 - x) - 2x = 14
-18 - 6x - 2x = 14
simplify
-18 - 8x = 14
then add 18 to both sides to get the x's on there own
-8x = 32
then divide by -8
x = 32/-8
x = -4

2) multiply everything by 7x
2 + (6 x 7x) + ( 17x × 7x) = 18 x 7x
2 + 42x + 119x^2 = 126x
put everything on one side
119x^2 - 84x + 2 = 0
then use quadratic equation to solve

x = 0.024671849 or 0.6812105039

 

A girl is snorkeling 1meter below sea level and then dives down another 0.5 meters. How far below sea level is the girl?

Answers

Answer:

She is 1.5 meters below the sea level


Explanation:

The sea level is indicated by the number 0

What's above the sea level is indicated by +ve numbers

What's below the sea level is indicated by -ve numbers


We know that:

originally, her depth was 1 meter below the sea level

This means that her original depth is -1


Now, she dives an extra 0.5 meters, to get her final depth, we would add -0.5 to the original -1 meters


This means that:

her depth = -1 + (-0.5) = -1.5 meters

where the negative sign indicates that she is below the sea level


Hope this helps :)
To calculate how far below sea level the girl is, you simply need to add 1 meter to 0.5 meters. This gives you the answer of 1.5 meters below sea level. (not sure what I can add to this answer)

Are z³ and 3z equivelent?explain​

Answers

Yes because you are multiplying 3 z’s and also 3z’s

The area of a triangle is 494 cm.sq. If base is 38 cm, find the height.

Answers

The formula for area of a triangle is 1/2 x base x height.

Using the given information we can solve for the height:

494 = 1/2 x 38 x height

Divide both sides by 38:

13 = 1/2 x height

Multiply each side by 2:

26 = height.

The height is 26 cm.

What is the solution to y + 8.5 = 17.2?

Answers

Answer:

y =8.7

Step-by-step explanation:

y + 8.5 = 17.2

Subtract 8.5 from each side

y +8.5-8.5 = 17.2 -8.5

y =8.7

Answer:

8.7

Step-by-step explanation:

y + 8.5 = 17.2

combine the like terms

y = 17.2-8.5

y=8.7

verify

y + 8.5 = 17.2

8.7+8.5=17.2

17.2=17.2

Before the assembly began, only 35 percent of the students were seated. If 91 students were not seated, how many students were there in all?

Answers

total=100%
seated==35%
100%-35%=65%=not seated

91=not seated=65% of of all
find 100%

91=65% of all
91=0.65 times all
divide both sides by 0.65
140=all


140 students
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