6. write the following proportion using colons. 7 is to 21 as 3 is to 9. a. 7: 21 = 3: 9 b. 7: 3 = 21: 9 c. 21: 7 = 3: 9 d. 7: 21 = 9: 3

A. 7:21 = 3:9

Step-by-step explanation:

7 is to 21 as 3 is to 9.

Replace the word to with colons and the word as with the equals sign

7:21 = 3:9

infinitely many solutions

step-by-step explanation:

we have been given the equation;

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

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.