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2 years ago

16

Mathematics

1 answer:

Amanda [17]2 years ago

6 0

Maybe C? and thats about it I dont know?

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15. The cost of beverages in a vending machine is shown.

Alja [10]

Answer:

I can't understand what you have written and what to find

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3 years ago

Yana plans to run 1 mile she has run 7/10 of a mile what fraction of a mile does she have left to run

Andre45 [30]

Answer:

3/10

Step-by-step explanation:

7+3= 10 so 7+3=10/10 which is one mile

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3 years ago

A number equals six less than four times a number. What is the number?

WITCHER [35]

Answer:

1.5

Step-by-step explanation:

set x = 6

and x less than four time of 6

it may mean 6÷4

6÷4 = 1.5 #

7 0

3 years ago

Number 1 and 2 please (25 points)

Elenna [48]

Answers:

1) $(3x+2)+(4-5x)=-2x+6$

$(3+2i)+(4-5i)=7-3i$

2) $(1-3x)(2+x)=-3x^{2}-5x+2$

$(1-3i)+(2+i)=5-5i$

Step-by-step explanation:

In mathematics there are rules related to complex numbers, specifically in the case of addition and multiplication:

<u>Addition: </u>

If we have two complex numbers written in their binomial form, the sum of both will be a complex number whose real part is the sum of the real parts and whose imaginary part is the sum of the imaginary parts (similarly as the sum of two binomials).

For example, the addition of these two binomials is:

$(3x+2)+(4-5x)=3x-5x+2+4=-2x+6$

Similarly, the addition of two complex numbers is:

$(3+2i)+(4-5i)=3+4+2i-5i=7-3i$ Here the complex part is the number with the $i$

<u>Multiplication: </u>

If we have two complex numbers written in their binomial form, the multiplication of both will be the same as the multiplication (product) of two binomials, taking into account that $i^{2}=-1$ .