Help! Have a math test tomorrow and I'm. Not sure on this

d = days passed

y = pages read

Andrew right now is on page 50, so we can say that his equation looks like => y = 50.  He's planning to read 10 pages per day, so, let's make a quick table for that

dayspages

150 + 10(1)

250 + 10(2)

350 + 10(3)

450 + 10(4)

550 + 10(5)

d  50 + 10(d )

namely y = 50 + 10d.

Holly hasn't started to read yet, so her equation looks like => y = 0,  but she'll be reading faster than Andrew, she'll be doing 20 pages a day, let's make another table

dayspages

10+20(1)

20+20(2)

30+20(3)

40+20(4)

50+20(5)

d  0+20(d )

or just pretty much y = 20d.

bearing in mind that, on a system of equations, the solution is where the graphs meet, or intersect, check the picture below.

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°

step-by-step explanation: