Answer:
39°
sum of triangle's interior angles: 180°
180°-90°-51°=39°
That is not possible to make a triangle with a right angle and a acute angle because a acute triangle only has acute angles and a right triangle has a obtuse angle in it
The slope-intercept form:
y = mx + b
m - slope
b - y-intercept
Answer:
B. y = 4/9x + 4
slope = 4/9, y-intercept = 4
D. y = -4/9x - 4
slope = -4/9, y-intercept = -4
Answer:

Step-by-step explanation:
We have given that melissa used 4 cups of sugar to bake 54 cookies.
That means 1 cup of sugar will be used to bake
by unitary method
We have to find the ratio of cups to the cookies
We are using 1 cup of sugar
And cookies will be 
A and d seem correct to me.
b and c are definitely wrong.