Can someone please help me??????

PLEASE HELP:

zlopas [31]

Answer:

x=3, y=4

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Please help. On a winter day in Alaska, the temperature at noon was -0.6°C. From noon to 3:00, the temperature increased by 1.2°

fomenos

Answer:

1st choice

Step-by-step explanation:

Temp at noon was -0.6. It increases 1.2 until 3.

-0.6+1.2

gets colder 0.4, then 0.6.

-0.6+1.2-0.4-0.6

the only correct way to put this equation as one of the other answers is by putting it as -0.6+1.2+(-0.4)+(-0.6)

hope that helped!

7 0

4 years ago

In a trolley ride around an amusement park, a child traveled from one signpost to a second signpost at a constant speed of 125 m

Inessa05 [86]

Answer:

Given speed of trolley = 125 meters per minute

$Speed= 125 meters/minute\\\\Speed =\frac{125}{60}meters/second\\\\Speed=2.083m/s$

Now we know that

Distance= Speed x time

Thus for the first case since the time of travel is less than 450 seconds thus the distance traveled is less than

Distance < 2.083 x 450 =937.5 meters

hence depending on the given information we cannot come to any conclusion weather the distance travelled is less than 800 m or greater than 800 m.

For the second case

since the time of travel is greater than 400 seconds

Thus the distance traveled is

$Distance>2.083\times 400=833.2meters$

which is greater than 800 meters.

4 0

4 years ago

What is the justification for the step taken from line 1 to line 3

goblinko [34]

The answer is combining like tems

8 0

3 years ago

which items of information are necessary to calculate the mass percent of an element in a given compound? select all that apply.

solmaris [256]

The mass percent of an element in a compound can be calculated by knowing specific items of information

The items of information necessary are;

The molar mass of the element, $MM_{element }$

The count of the number of moles of the element in the compound, <em>n</em>

The compound's formula

The compound's molar mass

Reasons:

The mass percent of an element in a compound is given as follows;

$Mass \ percent \ of \ element \ in \ a \ compound = \dfrac{MM_{element } \times n}{MM_{compound}} \times 100$

Where;

$MM_{element }$ = Molar mass of the element

$MM_{compound}$ = Molar mass of the compound

n = The number of moles of the element in the compound

Therefore, the items of information necessary to calculate the mass percent in a given compound are;

The molar mass of the element, $MM_{element }$

$MM_{element }$ , gives the mass per unit of the element in the compound

The count of the number of moles of the element in the compound, <em>n</em>

The number of moles of the element per mole of the compound gives the number by which the molar mass is multiplied, to get the mass of the element in the compound

The compound's formula

The formula of the compound is the source of information of the number of moles of the element present in a mole of the compound

The compound's molar mass

The molar mass of the compound is the mass to which the mass of the element in a mole of the compound is a fraction. That is the mass that divides the mass of the element in the calculation of the mass percent of the element

With the above information about the element in the compound, its mass percent can be calculated

Learn more here:

brainly.com/question/13648441

4 0

2 years ago

Can someone please help me??????​

Can someone please help me??????