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kap26 [50]
2 years ago
11

Physical and chemical changes

Mathematics
2 answers:
OlgaM077 [116]2 years ago
5 0
Physical changes the appearance of matter. Chemical change is when two substances combine to form a new one
SCORPION-xisa [38]2 years ago
3 0

Answer:

Physical and chemical changes can occur in matter. The look of material changes as a result of a physical change. Physical changes are sometimes known as phase changes. When materials change phase, they transition from solid to liquid, liquid to gas, or some other combination. If you mix materials together and see fire, bubbles, or a change in color, you might be able to see a chemical shift.

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Marcus has $28 to spend. He spent $3.75 to buy a notebook. He needs to save $11.25 but he wants to buy a snack. Chips cost $1.30
Alborosie

Total money Marcus has = $28

Money spent to buy a notebook = $3.75

Money left now = 28-3.75=24.25

Money needed to be saved = $11.25

So, the amount of money Marcus can spend = 24.25-11.25=13

Cost of a packet of chips = $1.30

The inequality to determine the maximum number of chips he can buy is:

Let the number of chips Marcus can buy = x

As he cannot spend more than $13 to buy chips so equation becomes:

1.30x\leq 13

Solving this we get

x\leq 10

Hence, Marcus can buy a maximum of 10 packs of chips and  save $11.25



4 0
2 years ago
Could anyone help me with these?
lora16 [44]
Part A:

Derrick is incorrect.
A yard is equivalent to 3 feet.
Thus, 20 yards will be equivalent to 60 feet.

The width is 20 yard and 2 feet. It's the same as 60 feet and 2 feet, or 62 feet. Thus, Derrick is incorrect.

Part B:

Let's calculate the area of the parking lot.

We know the width is 62 feet from part A.
The length is 30 yards, or 90 feet.

Multiply the length and width to get the area in square feet.

90 \times 62=5580

The parking lot has an area of 5580 square foot.
It costs 2 dollars per square foot to repave the parking lot. Multiply the area by 2 dollars.

5580 \times 2=11160

It will cost $11,160 to repave the whole parking lot.
4 0
3 years ago
Read 2 more answers
Nathan cut a square tile in half for his kitchen floor design. He made one cut along a diagonal from one vertex to another verte
Amiraneli [1.4K]
<span>3. Two isosceles right triangles

Every square has 4 right angles, so each triangle will have one right triangle, which makes the triangles, right triangles. 

They are isosceles because all sides of the square are the same, though the diagonal is not.

Hope this helps :)


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4 0
3 years ago
Solve the compound inequality 7x &gt; –35 and 3x ≤ 30.
docker41 [41]

Answer:

x>-5 x ≤10

Step-by-step explanation:

-35/7=-5

7x/7=x

3x/3=x

30/3=10

5 0
2 years ago
Which scalelfactors are contractions?<br> -1<br> 3/4<br> -0.5<br> 7
yanalaym [24]

Answer:

- 1

<h2>Not sure!! I don't know this asnwer is wrong or right.</h2>
5 0
3 years ago
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