Kelsey calculates that she spends 20% of a school day in science class. If she spends 55 minutes working in science class, how many minutes does Kelsey spend in school?

275 minutes

Step-by-step explanation:

1. 20% = 20/100

2. 55 minutes is a portion of the TOTAL amount of school so as a fraction is can be said as 55/x

3. now set up the proportion

20/100 = 55/x

we know this because 55 minutes = 20% of a school day

4. solve using cross multipication

20/100 = 55/x

20(x)=55(100)

20x=5500

x= 5500/20

x= 275

I hope this helped!

i can you with this question sweetie!

step-by-step explanation:

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°