Diane is mailing packages. each small pack package costs her $2.10 to send. each large package cost her $3.90.how much will it cost her to send 1 small package and 5 large package

First, organize your variables:

Let x= the number of small packages and y=the number of large packages. C= the cost of sending the packages.

Set up your equation:

2.10x+3.90y=C

Substitute 1 and 5 for x and y since that's how many packages Diane wants to mail, and then solve for C

2.10(1)+3.90(5)=C

2.10+19.50=C

21.60=C

It will cost Diane $21.60

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d