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(For guru2009 only) 1. 2x-5y=10; for...

(For guru2009 only)

1. 2x-5y=10; for y

Y=___ (Use integers or fractions for any numbers in the expression. Simplify your answer)

2. Retail prices in a department store are obtained by marketing up the whole price by 20%. That is, retail price is obtained by adding 20% of the wholesale price.

(A) What is the retail price of a suit if the wholesale price is $300?

The retail price is $___

(B) What is the wholesale price of a pair of jeans if the retail price is $90?

(C) The wholesale price is$___

3. Find the slope and y-intercept of the line

Y=6x-14

Find the slope.

The slope of the line is___ (Type an integer or a fraction)

Find the y-intercept___ (Type an integer or a fraction)

4. (A) Find the slope of the line that passes through the given points.

(B) Find the standard form of the equation of the lin.

(-4,-5) and (4,-8)

A. The slope is___ (Type an integer or a simplified fraction)

B. The slope is undefined

Choose the correct answer

a. Y+8=-3/8(x-4)

b. 13/2x+8y=52

c. Y=-3/8x-7

d. Y=-3/8x+7

e. 3x+8y=-52

f. Y+5=-3/8(x+4)

5. A plant can manufacture 50 golf clubs per day at a total daily cost of $5383 and 60 clubs per day for a total of $6133.

(A) Assuming that daily cost and production are linearly related, find the total daily cost, C, of producing x golf clubs.

C=___ (Simplify your answer. Use integers or fractions for any numbers in the expression. Do not include the $ symbol in your answer)

6. Write the equations of the vertical and horizontal lines through the point (-6, -1)

Equation of the vertical line___

Equation of the horizontal line___

7. One estimate for the ideal body weight of a woman is shown below. Use this information to answer parts (A) through (D).

50 kg + 2.5 kg for each inch over 5 feet

(A) Find a linear model for an estimate of the weight of a woman using w for ideal weight (in kilograms) and h height over 5 feet (in inches).

W=___ (Type an equation using h as the variable)

(B) Interpret the slope of the model.

___ the rate of change of weight with respect to height is 50 inches per kilogram

___ the rate of change of weight with respect to height is 50 kilograms per inch

___ the rate of change of weight with respect to height is 2.5 kilograms per inch

___ the rate of change of weight with respect to height is 2.5 inches per kilogram

(C) If a woman is ‘54” tall, what does the model predict her weight to be?

W=___kg

(D) If a woman’s predicted weight is 63 kilograms, what is her height?

H= 5 feet and ___ inches (Round to one decimal place as needed)

8. At low altitudes the altitude of a parachutist and time in the air are linearly related. A jump at 2,420 feet lasts 110 seconds.

(A) Find a linear model relating altitude a (in feet) and time in the air t (in seconds)

A=___ (Type an equation using t as the variable)

(B) Find the rate of change of the parachutist in the air

___ feet/sec

(C) Find the speed of the parachutist at landing

___feet/sec

9. Solve the system by the substitution method

X+2y = -2

Y = -3x-21

(A) The solution is ___ (Type an ordered pair)

(B) There are infinitely many solutions

(C) There is no solution

10. Solve by using the substitution or elimination by addition.

4x-2y= 52

3x+5y= -13

(A) The unique solution to the system is ___ (Type an ordered pair)

(B) There are infinitely many solutions

(C) There is no solution

11. Solve by using the substitution or elimination by addition.

5x-4y= 2

-10x+8y=-4

A. The unique solution to the system is ___ (Type an ordered pair)

B. There are infinitely many solutions

C. There is no solution

1. 2x-5y=10; for y

Y=___ (Use integers or fractions for any numbers in the expression. Simplify your answer)

2. Retail prices in a department store are obtained by marketing up the whole price by 20%. That is, retail price is obtained by adding 20% of the wholesale price.

(A) What is the retail price of a suit if the wholesale price is $300?

The retail price is $___

(B) What is the wholesale price of a pair of jeans if the retail price is $90?

(C) The wholesale price is$___

3. Find the slope and y-intercept of the line

Y=6x-14

Find the slope.

The slope of the line is___ (Type an integer or a fraction)

Find the y-intercept___ (Type an integer or a fraction)

4. (A) Find the slope of the line that passes through the given points.

(B) Find the standard form of the equation of the lin.

(-4,-5) and (4,-8)

A. The slope is___ (Type an integer or a simplified fraction)

B. The slope is undefined

Choose the correct answer

a. Y+8=-3/8(x-4)

b. 13/2x+8y=52

c. Y=-3/8x-7

d. Y=-3/8x+7

e. 3x+8y=-52

f. Y+5=-3/8(x+4)

5. A plant can manufacture 50 golf clubs per day at a total daily cost of $5383 and 60 clubs per day for a total of $6133.

(A) Assuming that daily cost and production are linearly related, find the total daily cost, C, of producing x golf clubs.

C=___ (Simplify your answer. Use integers or fractions for any numbers in the expression. Do not include the $ symbol in your answer)

6. Write the equations of the vertical and horizontal lines through the point (-6, -1)

Equation of the vertical line___

Equation of the horizontal line___

7. One estimate for the ideal body weight of a woman is shown below. Use this information to answer parts (A) through (D).

50 kg + 2.5 kg for each inch over 5 feet

(A) Find a linear model for an estimate of the weight of a woman using w for ideal weight (in kilograms) and h height over 5 feet (in inches).

W=___ (Type an equation using h as the variable)

(B) Interpret the slope of the model.

___ the rate of change of weight with respect to height is 50 inches per kilogram

___ the rate of change of weight with respect to height is 50 kilograms per inch

___ the rate of change of weight with respect to height is 2.5 kilograms per inch

___ the rate of change of weight with respect to height is 2.5 inches per kilogram

(C) If a woman is ‘54” tall, what does the model predict her weight to be?

W=___kg

(D) If a woman’s predicted weight is 63 kilograms, what is her height?

H= 5 feet and ___ inches (Round to one decimal place as needed)

8. At low altitudes the altitude of a parachutist and time in the air are linearly related. A jump at 2,420 feet lasts 110 seconds.

(A) Find a linear model relating altitude a (in feet) and time in the air t (in seconds)

A=___ (Type an equation using t as the variable)

(B) Find the rate of change of the parachutist in the air

___ feet/sec

(C) Find the speed of the parachutist at landing

___feet/sec

9. Solve the system by the substitution method

X+2y = -2

Y = -3x-21

(A) The solution is ___ (Type an ordered pair)

(B) There are infinitely many solutions

(C) There is no solution

10. Solve by using the substitution or elimination by addition.

4x-2y= 52

3x+5y= -13

(A) The unique solution to the system is ___ (Type an ordered pair)

(B) There are infinitely many solutions

(C) There is no solution

11. Solve by using the substitution or elimination by addition.

5x-4y= 2

-10x+8y=-4

A. The unique solution to the system is ___ (Type an ordered pair)

B. There are infinitely many solutions

C. There is no solution

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