MATHEMATICS MIDDLE SCHOOL

I really need help. Is percentage increase and decrease, both New -Old /Old *100 OR is percentage decrease Old-New/Old *100 WHOEVER ANSWERES FIRST AND CORRECTLY WILL BE MARKED AS THE BRAINLIEST ANSWER!!

Answers

Answer 1
Answer: both work but if it is a decrease using the first one it will be -xx%

Hope this helps :)

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Find the value of x (approximately),A = 177 cm?
x cm
13 cm
11 cm

12.8 cm
16.2 cm
14 cm
13.6 cm

Answers

Answer:. If the Area is 177, it should have been given in square centimeters.

If one side is 13 cm, the other side is about 13.6cm.

If one side is 11 cm, the other side should be about 16.1 cm. Even the choice is incorrect!

A/x = w

Step-by-step explanation: to find a side when the Area is given, divide the Area by the length or width given.

(789)(29192)(-x)= -29186

Answers

Hello. (789)(29192)(-x)= -29186 ; -23032488x= -29186 ; x=0,001267167. What do you think?

Three friends earned more than $200 washing cars. They paid their parents $28 for supplies and divided the rest of the money equally. Write an inequality to find possible amounts each friend earned.

Answers

earnings>200
paid 28
200-28=172
divided equally
earnings>172
divide 172 by 3
earningsperfriend>57.33333

PLEASE HELP!!!!!!!!The system of equations is inconsistent. What are the missing values?

5x+____y=2
____x+3y=8

Answers

5x+ay=2 \nbx+3y=8

Write it in the y=mx+b form.

ay=-5x+2 \n3y=-bx+8 \n \ny=-(5)/(a)x+(2)/(a) \ny=-(b)/(3)x+(8)/(3)

The system will be inconsistent when the equations describe two parallel lines.
Two lines are parallel when their slopes are identical.
-(5)/(a)=-(b)/(3) \nab=(-5) * (-3) \nab=15

Also they can't be the same line, so the y-intercepts must be different.
(2)/(a) \not= (8)/(3) \n8a \not= 2 * 3 \n8a \not= 6 \na \not= (6)/(8) \na \not= (3)/(4)

So for every value of a and b such that ab=15 and a≠3/2 this system of equations is inconsisent.

It can be:
5x+5y=2 \n3x+3y=8
or
5x+15y=2 \nx+3y=8
or
5x+(1)/(2)y=2 \n30x+3y=8
etc.

on June 1, 2013, the number of hours of daylight in Anchorage, Alaska was 18 1/4 hours. what was the number of hours without daylight?

Answers

ok if there is 24 hours in a day just do this 

24-18 1/4=5.87

so there were 5 3/4 of day like that was not there!

Emma has 16 crackers she eats some could she still have 16 left?

Answers

you can't take away from 16 and still have 16.
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