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Alexxandr [17]
3 years ago
14

Which promblem can be solved using 3 times 7=21

Mathematics
1 answer:
Eddi Din [679]3 years ago
8 0

Answer:

21/7= 3

Step-by-step explanation:

When we multiply 3 into 7 we get 21 .

Hence by the multiplication method, we get our answer.

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What is 4 3/10 plus (-6.2) in decimal form
k0ka [10]

Answer:

Step-by-step explanation:

First change 4 3/10 to 4.3. Then you change 4.3 + -6.2 to 4.3 - 6.2.

Then you do 4.3 - 6.2 and you should get - 1.9.

5 0
3 years ago
Read 2 more answers
A shop sells DVDs and CDs.
Vsevolod [243]

Answer:

Step-by-step explanation:

Lets Price of a DVD is fixed i.e. 15

and One CD price is 5 (Not fixed)

In First situation

2 DVDs and 1 CD cost = 35 as given

2 x 15 + 5 = 35

Lets one CD price is 7.5

In Second situation

2 x 15 + 2 x 7.5 = 45

Its mean CD price may be between 5 to 7.5

In asked scenario, Martin has 50

1 DVD and 3 CDs?

1 x 15 + 3 x 7.5 = 37.5

37.5 is lesser than 50

Hence Martin has enough to buy 1 DVD and 3 CDs.

3 0
3 years ago
The graph shows a distribution of data. What is the standard deviation of the data? A)0.5 B)1.5 C)2.0 D)2.5
ruslelena [56]

Answer:

A)0.5

Step-by-step explanation:

We can see in the graph , that it is bell-shaped along x =2. A bell-shaped graph along one value is called symmetric graph and it represents a normal distribution.

Since, the give graph is symmetric around x=2, so the mean of the data is 2.

The point immediate left to the mean represents x-σ

so,

2 - σ = 1.5

So,

σ = 0.5

The sigma represents standard deviation.

Hence, Option A is correct ..

7 0
3 years ago
Read 2 more answers
Area as a sum:<br> Area as a Product:<br><br><br> I need the are as a sum Nd a product
PSYCHO15rus [73]

Given:

The area model.

To find:

The area as a sum and area as a product.

Solution:

The four terms of the area model are 2x^2,10x, 3x, 15.

The area as a sum is the sum of all the terms of given area model.

Area as a sum = 2x^2+10x+3x+15

                        = 2x^2+13x+15

The area as a product is the factor form of sum of all the terms of given area model.

Area as a product = 2x^2+10x+3x+15

                        = 2x(x+5)+3(x+5)

                        = (x+5)(2x+3)

Therefore, the area as a sum is 2x^2+13x+15 and the area as a product is (x+5)(2x+3).

8 0
3 years ago
I neeed help asap please
jekas [21]

With what I can help

8 0
3 years ago
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