There were n signers of the declaration of independence. the oldest was benjamin franklin, who was y years old. 7 is 10% of y and n is 80% of y. how many signers were there?

Find out the  how many signers were there .

To prove

As given

There were n signers of the Declaration of Independence.

The oldest was Benjamin Franklin, who was y years old. 7 is 10% of y and n is 80% of y.

10% is written in the decimal form.

= 0.10

80% is written in the decimal form.

= 0.80

As given

7 is 10% of y

Than the equation becomes

7 = 0.10 × y

y = 70

As given

n is 80% of y

Than the equation becomes

n = 0.80 × y

Put the value of y in the above

n = 0.80 × 70

n = 56

Therefore the 56 signers of the Declaration of Independence.

your answer is 40

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.