N/A — Exam Answers

The height h , in feet, of a projectile t seconds after launch is modeled by the equation h is equal to 32 t minus 16 t squared How long after launch does the projectile return to the ground?

Raj tried to solve the following system. 9 x minus y is equal to 15 2 x plus 8 y is equal to 28 Raj's Work 9 x minus y is equal to 15 negative y is equal to 15 minus 9 x y is equal to negative 15 plus 9 x 2 x plus 8 times open paren 15 plus 9 x close paren is equal to 28 2 x plus 120 plus 72 x is equal to 28 74 x plus 120 is equal to 28 74 x is equal to negative 92 x is equal to negative 46 over 37 9 times open paren negative 46 over 37 close paren minus y is equal to 15 negative 414 over 37 minus y is equal to 15 y is equal to negative 969 over 37 What error did Raj make?

The digits of a two-digit number sum to 8. When the digits are reversed, the resulting number is 18 less than the original number. What is the original number?

A quadratic function is given. f⁡(x)=(x+10)^2−3 Danielle translated the graph 3 units down and 5 units to the left to create g⁡(x) What is the equation of g⁡(x) in vertex form? Enter your answers in the boxes.

A store sells the basic model of a phone for 60 dollars and the upgraded model for 200 dollars It costs the store 10 dollars to buy each basic model and 50 dollars to buy each upgraded model from the phone company. On Tuesday, the store has 1 dollars comma 800 in sales for these two models, and it paid the phone company 400 dollars to buy these phones. How many upgraded models did the store sell on Tuesday?

For what values of m does the graph of y is equal to m x squared minus 5 x minus 2 have no x -intercepts?

If y varies directly as x , and y is 400 when x is r and y is r when x is 4 , what is the numeric constant of variation in this relation?

Package A contains 3 birthday cards and 2 thank-you notes and costs 9 point 6 0 dollars Package B contains 8 birthday cards and 6 thank-you notes and costs 26 point 6 0 dollars If x represents the cost of a birthday card and y represents the cost of a thank-you note, how much does each birthday card cost? 3 x plus 2 y is equal to 9 point 6 8 x plus 6 y is equal to 26 point 6

If y varies directly as x , and y is 12 when x is 1 point 2 , what is the constant of variation for this relation?

A rectangular field has an area of 1 comma 764 m squared The width of the field is 13 m more than the length. What is the perimeter of the field?

What is the value of the product open paren 3 minus 2 i close paren times open paren 3 plus 2 i close paren ?

Which pair of complex numbers has a real-number product?

Donte simplified the expression. 4 times open paren 1 plus 3 i close paren minus open paren 8 minus 5 i close paren 4 plus 3 i minus 8 plus 5 i negative 4 plus 8 i What mistake did Donte make?

The cost of soup, s , varies directly with the number of cans, c When c is 4 , the cost is 3 dollars Which graph represents the cost of the soup?

How does the graph of y is equal to A times open paren x minus h close paren squared plus k change if the value of h is doubled?

What is the discriminant of 3 x squared minus 10 x is equal to negative 2 ?

The equation v_f=v_i+a⁢t is used to calculate the final velocity of an object undergoing constant acceleration. v_f is the final velocity in m/s v_i is the initial velocity in m/s a is the acceleration in m/s^2 t is the time in seconds. An object starts moving along a straight line with an initial velocity of 4+3⁢im/s It accelerates for a time period of t=2−i seconds under constant acceleration a=1+2⁢im/s^2 What is v_f ? Enter your answer in the box.

Which inequality is graphed?

Brandi is downloading music for her MP3 player. Albums cost 10 dollars each, and singles cost 1 dollars each. She wants to purchase at least 5 singles but wants to spend no more than 25 dollars total. If Brandi purchases x albums and y singles, which of the following is a possible combination of albums and singles that Brandi could purchase and stay within her guidelines?