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victus00 [196]
3 years ago
6

Select the correct statement or statements about compounds and molecules:

Mathematics
2 answers:
sineoko [7]3 years ago
7 0

Answer:

1) and 3)

Step-by-step explanation:

Ksenya-84 [330]3 years ago
6 0

Answer:

<h3> 1) Compounds don’t act like their elements; Compounds act like a different substance.</h3><h3>3) A molecule is two or more atoms bonded together.</h3>

Step-by-step explanation:

A compound is a molecule which is made of atoms from different elements.

Compounds are useful beacuse they don't actually act like their elements. For example, if you think about H_{2}O, you observe that it's a compund of 2 atoms of hydrogen and 1 atom of oxygen, but the compund doesn't act like hydrogen or oxygen, it's water. Therefore, the first choice is correct.

Now, as we said before, a molecule is form by atoms, specifically by two or more, because a single atom cannot form a molecule, it would be just an atom by itself. Therefore, the third choice is correct.

So, the right choices are 1 and 3.

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Claire is a manager at a toy packaging company. The company packs 80 boxes of toys every hour for the first 3 hours of the day.
Stells [14]

Answer:

See the attached figure.

Step-by-step explanation:

Modeling each part as a function.

Let x is hours of the working day

The company packs 80 boxes of toys every hour for the first 3 hours of the day. ⇒ y₁ = 80 x , x ∈ [0,3]

At the end of the 3 hours The company packs = 80 * 3 = 240

They stop packaging for the next 2 hours in order to carry out a training session. ⇒ y₂ = 240 , x ∈ [3,5]

Then, for the next 4 hours, they pack 20 boxes of toys every hour

y₃ = 20x + c , x ∈ [5,9]

To find c, y₂ = y₃ at x =5

∴ 240 = 20 * 5 + c

∴ c = 240 - 20 * 5 =240 - 100 = 140

∴ y₃ = 20x + 140 , x ∈ [5,9]

So,

y₁ = 80 x , x ∈ [0,3]

y₂ = 240 , x ∈ [3,5]

y₃ = 20x + 140 , x ∈ [5,9]

The graph models the piecewise function for the given situation is as shown in the attached figure.

8 0
3 years ago
Read 2 more answers
What is 4b+2(1+3b)=82
NemiM [27]

Answer:

8

Step-by-step explanation:

  • 4b+2+6b=82
  • 10b=80
  • b=8
7 0
3 years ago
Read 2 more answers
The straight line ℓ is perpendicular to the line y + 2x = 9 and passes through the point p(4, 3). find the x-intercept of ℓ.
evablogger [386]
The slope of the line l is the opposite reciprocal of y+2x=9. Rearranged the equation to y=9-2x and we get a slope of -2. The opposite reciprocal of -2 is 1/2.

y-y=m(x-x)
y-3=.5(x-4)
y=.5x+1

At the x-intercept, y=0, so
0=.5x+1
-1=.5x
x=-2
8 0
3 years ago
If I bought shoes for 32.30 with 15% off 7%sales tax a 25dollar gift card but had a coupon that was forgotten for 5%off the orig
Otrada [13]

Answer:

 $4.37 cash outlay

 $29.37 total amount paid, partly with gift card

Step-by-step explanation:

The discount was ...

  0.15 × $32.30 = $4.845 ≈ $4.85

So the price to which tax is added is ...

  $32.30 -4.85 = $27.45

The amount of tax is 7% of this value, or ...

  tax = $27.45 × 0.07 = $1.9215 ≈ $1.92

So, payment is made on the amount ...

  $27.45 + 1.92 = $29.37

$29.37 is the total amount paid.

If $25 is paid using a gift card, then the cash outlay is $4.37.

_____

Usually only a single coupon can be applied to a given purchase. Since the 15% store discount exceeds the amount of the 5% coupon left at home, it makes more sense to claim the 15% store discount and save the 5% coupon for another time.

__

<em>Alternate interpretation</em>

If, by some magic, both discounts could be applied, then the amount to be paid is $27.65, of which $2.65 exceeds the gift card amount. The calculation proceeds the same way, except that 20% is used instead of 15%.

4 0
3 years ago
How do you write 71,700,000,000 in scientific notation?
Helen [10]

Answer:

7.17 (10^10)

Hope this helps!

3 0
3 years ago
Read 2 more answers
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