Y = Why Though? (Linear Equations)
Solve: 2x + 5 = 17
x = 6
A gym charges a $15 sign-up fee plus $8 per class. Write an equation for the total cost y after x classes.
y = 8x + 15
What is the sum of the angles in a triangle?
180 degrees
The trig ratio of sin is represented by what?
___________
__________
Hypotenuse
Solve:
3x=213x=213x=21
A. 3
B. 6
C. 7
D. 9
Which answer can you eliminate immediately because it is too small?
A: 3
What is the slope of this line: y = -3x+8
m = -3
A ladder leans against a wall. The bottom of the ladder is 6 feet from the wall and the ladder is 10 feet long. How high up the wall does the ladder reach?
h = 8 feet
A right triangle has one acute angle measuring 35°. What is the other acute angle?
55 degrees
A right triangle has:
What trig ratio would you use? What would it be?
Sin = 3/5
If a graph has a negative slope, which answer choices can you eliminate?
A. Positive slopes
B. Fractions
C. Decimals
D. Negative numbers
A: Positive slopes
A line passes through (2,5) and (6,13). What is the slope?
m = 2
A phone battery starts at 90% and loses 5% every hour. Write an equation for the battery level after h hours.
y = 90 - 5h
What is the length of a rectangle that is 60 square units and has a width of 5.
Length = 12 units
A ladder leans against a wall. The ladder is 10 feet long and reaches 8 feet up the wall. Which trig ratio would help find the angle with the ground?
A. Sine
B. Cosine
C. Tangent
D. None
cosine
A student solves:
2x+4=102x+4=102x+4=10
Which answer is reasonable?
A. 3
B. 30
C. 300
D. -100
A: 3
Solve: 4(x-2)=20
x = 7
A rectangular garden has a length that is 5 feet longer than its width. The area of the garden is 84 square feet. Find the dimensions of the garden.
The width is 7 feet and the length is 12 feet.
A circle has radius 4. What is the area? Round to the hundredths place.
A = πr2
50.27square units
A right triangle has:
Which trig ratio should be used to find the angle?
cosine
A problem asks for AREA, but a student chooses an answer measured only in inches. Why is that probably wrong?
Area should be in square units.
Which equation represents a line with slope 3 and y-intercept -2?
A. y=−2x+3
B. y=3x−2
C. y=2x+3
D. y = -3x - 2
B: y = 3x -2
A school is selling tickets to a fundraiser. Student tickets cost $5 and adult tickets cost $9. The school sold 120 tickets total and made $780. How many adult tickets were sold?
45 adult tickets were sold.
A right triangle has a hypotenuse that is 10 inches and a leg that is 3 inches. What is the length of the other leg? Round to the hundredths place.
9.54 inches
Which sides does tangent compare?
Opposite/Adjacent
A movie theater sells adult tickets for $12 and student tickets for $8. A group buys 10 tickets total and spends $96. How many student tickets were sold?
6 student tickets were sold.