MATHEMATICS HIGH SCHOOL

Every 1/2 hour Naomi streches her neck; every 1/3 hours she stretches her legs; and every 1/6 hour she streches her arms. Which parts of her body will Naomi strech when2/3 of an hour has passed?A- neck and legs
B- neck and arms
C- legs and arms
D- none

Answers

Answer 1
Answer:  The correct answer A. 

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Which of the following ordered pairs represents the solution to the system given below? x − 4y = 7
5x + 9y = 6

Answers

x − 4y = 7
5x + 9y = 6

5x − 20y = 35  //1st * 5
5x + 9y = 6

5x +9y - 5x + 20y = 6 - 35  //2nd - 1st
5x + 9y = 6

29y=-29
5x=6-9y

y=-1  //1st : 29
5x=6-9*(-1)

y=-1
x=15:5 //2nd : 5

y=-1
x=3

check:
for x=3 and y=-1 there is:
x − 4y = 7 is 3 − 4*(-1) = 7 is 7=7 ok
5x + 9y = 6 is 15-9=6 is 6=6 ok

answer: (3;-1) represents the solution.

Answer:

It’s 3,-1

Step-by-step explanation:

You have to plug in the points u can use a calculator or work it by hand but I did it on the calculator and that’s what I got

Im factoring and i need to find what times what equals 120 but subtracts to be 7

Answers

it would have to be 15 and 8 

Please help!! Im bad at this

Answers

Answer:

B

Step-by-step explanation:

This is proportional because the number of calories burned is directly proportional to the amount of time spent on the treadmill

P10.
2
In parallelogram PQRS, Ô = 114º,
PT bisects Ê and TS bisects ŝ.
Prove that PT I ST.
R

Answers

Answer:

PQ R s parallelogram

< Q = < s = 114

< P = 180 _ 114 = 66

<2 = 66 / 2 = 33

< I = 114 / 2 = 5 7

< I + < 2 = 3 3 + 57 = 90

< ( STP ) = 90

TP I ST

How are fractions and decimals related

Answers

A fraction is a short way to write a division problem. When you see a fraction, it means "the top number divided by the bottom number". When you actually DO the division, the answer is the decimal that's equal to the fraction.
because fractions and decimals represent the same value just in a different form

3x + y = 17
4x - y = 18

Answers

The two equations given are
3x + y = 17 and 4x - y = 18
Now we will first take one equation
3x + y = 17
Then
y = 17 - 3x
Now replacing the value of y in the second equation we get
4x - y = 18
4x - (17 - 3x) = 18
4x + 3x - 17 = 18
7x = 35
 x = 35/7
   = 5
Putting the value of x in the first equation we get
3x + y = 17
(3 * 5) + y = 17
15 + y = 17
y = 17 - 15
y = 2
So the value of x is 5 and y is 2
3x+y=17
subtract 3x on both sides
y=17-3x
substitute 17-3x for y in the second equation
4x-(17-3x)=18
7x-17=18
7x=35
x=5

and now that you know x=5 you can plug that in to either of the original equations
3(5)+y=17
15+y=17
subtract 15 from both sides
y=2
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