3 years ago

Describe the energy transformations that occur when you burn a piece of wood

Mathematics

1 answer:

Nesterboy [21]3 years ago

3 0

The wood burns into an ash.

Chemical change.

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Joanna went school supply shopping. She spent $33.33 on notebooks and pencils. Notebooks cost

vodomira [7]

Answer:

Joanna bought 21 items that come out to a total of $33.33. She bought 9 notebooks and 12 pencils.

Step-by-step explanation:

Notebooks (N) = $1.85 Pencils (P) = $1.39

9N+12P= $33.33

9*1.85=16.65

12*1.39=16.68

16.65+16.68=33.33

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2 years ago

What is the value of 34 + 3.5(−44÷2)? a.−111 b.−43 c.43 d.111

mart [117]

Answer:

Step-by-step explanation:

-44÷2=-22

34+3.5*-22= -43

5 0

2 years ago

Add 620 grams to 3.7 kilograms.give your answer in kilogram

Alla [95]

3.7kg is also equal to 3700 grams
3700+620 grams
= 4320 grams
= 4320/1000 kg
= 4.32 kg

3 0

2 years ago

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Rebecca drove 44 1/3 miles in 1 1/3 hours. What is the unit rate for miles per hour?

saul85 [17]

$unit\ rate=\frac{distance}{time}\\\\
distance=44\frac{1}{3} miles\\
time=1\frac{1}{3}hour\\\\
unit\ rate=\frac{44\frac{1}{3}}{1\frac{1}{3}}=\ \ \ | make\ improper\ fractions\\
\frac{\frac{133}{3}}{\frac{4}{3}}=\frac{133}{3}*\frac{3}{4}=\frac{133}{4}=33\frac{1}{4}\\\\
unit\ rate= 33\frac{1}{4}\frac{miles}{hour}
$

5 0

3 years ago

How do you calculate angles on a straight line??

dimaraw [331]

Answer:

Step-by-step explanation:

Straight line is an angle whose vertex point(O) has a value of 180. The arms (OA & OB) of the straight line angle lies opposite to each other from the vertex point

Sum of all the angles in a straight line = 180

From this you can find the value of unknown angle, if other angles are given.

∠AOC + ∠BOC = 180

3 0

2 years ago

Read 2 more answers