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2 years ago

Draw an area model and then solve using the standard algorithm

Mathematics

1 answer:

Serggg [28]2 years ago

4 0

Answer:

well if your asking for 21 x 23 its 483

Step-by-step explanation:

Hi if the awnser for the equation is not the anwser your looking for please comment so I can help you with something else and here how you get the anwser you can break 21 and 23 down so 20 +1 and 20+ 3 then these steps or array.

20x20=400

20x1=20

20x3=60

3x1=3

Now add those numbers together you get 483

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4 ? 10<br> 9 22 <br><br> Do these two ratios form a proportion

Sav [38]

Yes because they as fraction would be equal parts I think

8 0

2 years ago

V+8w=4v,for v<br><br> -m+5n=-2, for n

jok3333 [9.3K]

Answer:

v = 8w/3,
n = (m - 2)/5.

---------------------------

<h3>Given equations</h3>

v + 8w = 4v and - m + 5n = - 2

<h3>Solve the first equation for v</h3>

v + 8w = 4v
4v - v = 8w
3v = 8w
v = 8w/3

<h3>Solve the second equation for n</h3>

- m + 5n = - 2
5n = m - 2
n = (m - 2)/5

6 0

1 year ago

Read 2 more answers

Zara walked 3/4 mile in 30 minutes. How long will it take her to walk 2 miles?

Talja [164]

Answer:

80 minutes

Step-by-step explanation:

(3/4)/30=2/x

cross product

30*2=(3/4)x

60=3/4x

x=60/(3/4)

x=(60/1)(4/3)

x=240/3

x=80

5 0

3 years ago

Why is 1 + (−5) equal to −4? PLEASE HELP

AfilCa [17]

Answer:

Since the -5 is a bigger number than 1 you would keep the negative and carry it to the -4.

Step-by-step explanation:

7 0

3 years ago

A team of scientist surveying a forest found that there were four oak trees for every 10 pine trees. If they counted 24 more pin

Ipatiy [6.2K]

Answer:

There are 16 Oak tree in the forest.

Step-by-step explanation:

Given: There are 4 Oak tree on every 10 pine trees.

There are total 24 more pine tree than Oak tree.

Using the ratio of trees to find the number of trees.

Lets assume there are total number of Oak tree be "x".

∴ Total number of Pine trees will be $"x+24"$

We know the ratio of Oak to Pine tree is 4:10 or $\frac{4}{10}$

⇒ $\frac{x}{x+24} = \frac{4}{10}$

Multiplying both side by $x+24$

⇒ $x= \frac{4(x+24)}{10}$

Using distributive property of multiplication, distributing 4 with x and 24.

⇒ $x= \frac{4x+96}{10}$

Multiplying both side by 10

⇒ $10x= 4x+96$

subtracting both side by 4x

⇒ $6x= 96$

dividing both side by 6

⇒ $x= \frac{96}{6}$

∴ $x= 16$

Hence, There are 16 Oak trees in the forest.

5 0

3 years ago