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Anettt [7]
2 years ago
12

How does 10 - 4 help you solve 30 - 4

Mathematics
2 answers:
NikAS [45]2 years ago
7 0
It helps because if you know 10-4=6 then you know that 30-4 would be 26. Since 30 is only 20 more than 10 you know that 20+6 would be the answer.
kirza4 [7]2 years ago
4 0

Answer:

The value of given expression is 26.

Step-by-step explanation:

We need to solve 30 - 4 using 10 - 4.

First of all solve 10 - 4.

10-4=6                     .... (1)

Consider the given expression

30 - 4

Split the number 30 as the sum 10 and a number.

(20 + 10) - 4

It can be written as

(20 + 10) + (-4)

Using associative property of addition.

20 + (10 + (-4))

20 + (10 - 4)

Using equation (1) we get

20 + 6

26

Therefore the value of given expression is 26.

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2 years ago
Triangle ABC was dilated and translated to form similar triangle A'B'C'.
Hunter-Best [27]
Dilation refers to a non rigid motion where a figure is transform and its image has the same form but a different size measure.

On this exercise is asked to find the scale factor by which the triangle ABC was 
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As can be see on the picture the dilation produce was an enlargement meaning that the image is larger that the preimage.
Of this form you can discard the choices A and B as possible solutions.

Lets try 5/2 as the possible scale factor:
(x,y)-- (kx, ky)
A(0,2)--(5/2(0),5/2(2))=A'(0,5)
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Lets try 5/1 or 5 as the scale factor:
A(0,2)--(5(0),5(2))=A'(0,10)
B(2,2)--(5(2),5(2))=B'(10,10)
C(2,0)--(5(2),5(0))=C'(10,0)

As said at the beginning of the question the triangle was not only dilated.
After a dilation and a translation, the scale factor of the dilation is letter C or 5/2.  

3 0
2 years ago
Read 2 more answers
Maria said that -4n + 3 +9n - 4 is equivalent to 4n. What error did maria likely make?
ivann1987 [24]
Maria combined all of the factors, which were not all like terms. She should’ve did -4n+9n and 3-4 to get 5n-1
8 0
2 years ago
Read 2 more answers
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