Which equation is true when n =4
a 2n=6
b n + 3=7
c 9-n=13
d n 12 = 3 n over 12 is fraction form
in ms perrons class 75 percent of students are boys. there are 18 boys in the class. what is the total number of students in ms perrons class

n+3 = 7 ; 24 students

Step-by-step explanation:

When n =4

a 2n=6

(2×4) = 6

8 = 6 (Wrong)

b n + 3=7

4 + 3= 7 (Right)

c 9-n=13

9 - 4 = 13

5 = 13 (Wrong)

d n 12 = 3 n over 12 i

(4×12) = (3×4)/12

48= 1 (Wrong)

In Ms perrons class 75 percent of students are boys and there are 18 boys in the class.

Let the total number of students in the class be y.

75% of y = 18

75/100 × y = 18

0.75 × y = 18

0.75y = 18

y = 18/0.75

= 24

There are 24 students in the class.

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°