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ss7ja [257]
3 years ago
14

Help with math!!! 3 questions...

Mathematics
1 answer:
sashaice [31]3 years ago
3 0
#1=D        #2=d      #3=B     hope i helped and please mark me as brainiest
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Expand why you would make one of the addends a tens number when solving an addition problem.
MaRussiya [10]
It makes it easier to solve
4 0
3 years ago
Given only the information in the diagram, determine if m is parallel to n . If so, name the postulate or theorem used to suppor
Helen [10]
From my research on the internet, the image attached supports this problem. The two lines are parallel, as supported by the converse of corresponding angles postulate. It states that:<span> If a </span>transversal<span> intersects two lines and the corresponding angles are </span>congruent<span>, then the lines are parallel.</span>

5 0
3 years ago
Read 2 more answers
1) reflection across y = x
Harlamova29_29 [7]
I’m doing this so I can ask a question
4 0
3 years ago
(-3C^4-5C^2-7C)+(4C^4+8C^3+2C^2) in standard form
posledela

Answer:

C(C^3 + 8C^2 -3C -7)

Step-by-step explanation:

(-3C^4-5C^2-7C)+(4C^4+8C^3+2C^2)  

(-3C^4 +4C^4)+8C^3 + ( -5C^2 +2C^2)  -7C  [Combine like terms]

C^4 + 8C^3 -3C^2 -7C                                     [Simplify]

C(C^3 + 8C^2 -3C -7)                                   [Isolate 1C from the rest]

4 0
3 years ago
Wolfrich lived in portugal and brazil for a total period of 14 months in order to learn portuguese. He learned an average of 130
maksim [4K]

Answer: he lived 9 months in Portugal and 5 months in Brazil.

Step-by-step explanation:

Let x represent the number of months he lived in Portugal.

Let y represent the number of months he lived in Brazil.

Wolfrich lived in Portugal and Brazil for a total period of 14 months in order to learn Portuguese. This means that

x + y = 14

He learned an average of 130 new words per month when he lived in Portugal and an average of 150 new words per month when he lived in Brazil. In total, he learned 1920 new words. This means that

130x + 150y = 1920- - - - - - - - - - - 1

Substituting x = 14 - y into equation 1, it becomes

130(14 - y) + 150y = 1920

1820 - 130y + 150y = 1920

- 130y + 150y = 1920 - 1820

20y = 100

y = 100/20

y = 5

x = 14 - y = 14 - 5

x = 9

8 0
3 years ago
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